Dream 2655PIA-DK User manual

2655PIA-DK_Rev0 – User’s Manual
2655PIA-DK Users Manual - Rev. 03/13 1© 2013 Dream S.A.S.
2655PIA-DK Quick Guide
Digital piano with SAM2655 V0.0
1. Making connections
Connect the Front panel to the main board
Connect the main board to a FATAR TP40 keyboard
Connect The main board to pedal (see table below for pinout)
Connect the main board audio outputs to line level inputs of a mixer, a stereo sound system…
Connect the main board to 12V/1A DC power supply (- to tip , +to ring )
Pedal Inputs (J18) Pinout
Pin # Function Description
1 Pedal Ground Reference Ground for pedal inputs
2 Forte (Sustain) 4-level Half-pedal
Sustain Max if connected to Pedal Ground
Sustain Off if not connected
3 Sostenuto On/Off pedal
Sostenuto on if connected to Pedal Ground
Sostenuto off if not connected
4 Una Corda (Soft) On/Off pedal
Soft on if connected to Pedal Ground
Soft off if not connected

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2. Front Panel
3. Functions
Instrument Select:
1: Studio Grand Piano, 2: Concert Grand Piano
3: Electric Piano 1 4: Electric Piano 2
5: Harpsichord 6: Vibes
7: Strings 8: Church Organ
Layer (Dual) mode is available by simultaneously pressing two “Instrument Select” buttons.
Double function buttons:
There are two different firmwares for 2655PIA-DK.
- 2655PIA-ST is firmware version with Style player
- 2655PIA is firmware without Style player
All buttons have same functions in the two versions except that 6 of them have double functions in 2655PIA-ST. To
alternate between the two sets of functions, just press “Plus” and “Minus” buttons at the same time.
Blinking point in right down corner of the LED display shows that double functions buttons are in Style Player mode.
Plus
Minus
Set
Demo
Rec Mode
Play_Rec Start
TrackA
TrackB
Metronome
Instrument Select
Registration select
Chorus
Reverb
Intro_Ending / Split
Fill In_Key Start /Tune
Start/Stop / Transpose
Variation / Touch Curve
Rhythm Only / Manual Drums
St
y
le selection / Sliders Assi
g
n
Registrations Mode
Assignable Slider 1:
default = Port 2 volume
Assignable Slider 2:
default = Balance

2655PIA-DK_Rev0 – User’s Manual
2655PIA-DK Users Manual - Rev. 03/13 3© 2013 Dream S.A.S.
Button Function in
2655PIA Default Function in 2655PIA-ST Alternate Function in 2655PIA-ST
Start_Stop / Transpose Transpose Transpose Start_Stop
Intro_Ending / Split Split Split Intro_Ending
Style Selection / Sliders Assign Sliders Assign Sliders Assign Style Selection
Fill In_Key Start Tuning Tuning Fill In_Key Start
Rhythm Only Manual Drums Manual Drums Rhythm Only
Variation Touch Curve Touch Curve Variation
Split:
- Press the “Split” button to activate Split function. “Split” LED will turn on.
If Dual mode is activated
- First selected sound in previous Dual mode is played on left of the split point (Lower sound). It is transposed
one octave up.
- Second selected sound in previous Dual mode is played on right of the split point (Upper sound)
If not in Dual mode
- Current selected sound is played on right of the split point (Upper sound)
- Strings sound is played on left of the split point (Lower sound). It is transposed one octave up.
Default split point is G2 (MIDI note #55). Split point can be changed:
- Press and hold the “Split” button, then press a key on the keyboard.
The pressed key becomes the lower note for the Upper sound. Its MIDI number is displayed.
Change the Upper sound
- Press one of the 8 instrument buttons
Change the Lower sound
- Press and hold the “Split” button, then press one of the 8 instrument buttons
Transpose:
Global transpose is available in the range (-12,+12 semitones)
- Press and hold the “Transpose” button, then press the “Plus” or “Minus” button to specify the desired
transposition value.
The “Transpose” LED will turn on, indicating that the transpose function has been activated.
The current transpose setting will be shown in the display.
- To cancel transpose, select value “0” or press again the “Transpose” button. “Transpose” LED will turn off.
Transposition value is memorised until power off.
- To recall memorized transposition, press the “Transpose” button. “Transpose” LED will turn on.
Tuning:
Global tuning is available in the range (427.0, 453.0Hz)
- Press “Tuning” button. The “Tuning” LED will turn on. Default value is 440.0Hz. Display shows “40.0”
- Use the “Plus” or “Minus” button to specify the desired tuning value. Display is “27.0” ~ “53.0”. Steps are
0.5Hz.
- Press “Tuning” button to quit.
Reverb Type: Room1 / Room2 / Hall / Plate.
Reverb depth can be set for each instrument. Follow the steps below:
- Hold the “Reverb“ button pressed
- Use the “Plus“ and “Minus” buttons for adjusting the reverb depth in the range 1-20
Chorus: Chorus1 / Chorus2 / Short Delay.
Chorus depth can be set for each instrument. Follow the steps below:
- Hold the “Chorus“ button pressed
- Use the “Plus“ and “Minus” buttons for adjusting the chorus depth in the range 1-20

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Touch Curve: Soft / Medium / Hard / Constant Velocity (default = 64)
Touch curve can be selected for each instrument
- Press the “Touch Curve” button. The “Touch Curve” LED will turn on. Default value for current selected
instrument will be displayed: “S F t” message for Soft curve, “M E d” for Medium curve, “H r d” for Hard curve
and “C S t” for Constant curve
- Press the “Touch Curve” button again for exit.
The value for the constant velocity can be set:
- While constant curve is selected, hold the “Touch Curve“ button pressed until the display shows the current
constant dynamic value.
- Use the “Plus“ and “Minus” buttons for adjusting the constant dynamic in the range 0-127
Demo:
Press “Demo”, then press “Instrument Select” button 1, 2 or 3.
Metronome:
The metronome signature can be set. Follow the steps below:
- Hold the “Metronome“ button”
- Use the “Plus“ and “Minus” buttons for choosing the signature.
Available signatures are 1/4, 2/4, 3/4, 4/4, 5/4, 6/8, 12/8
- Press “Set” button to display metronome volume. Metronome volume can be adjusted from “1” to “20” with the
“Plus“ and “Minus” buttons.
Sequencer
A 4-track, 3-song sequencer is implemented in 2655PIA-DK. Sequencer functions are handled with “Rec Mode”,
“Play/Rec Start”, “Track A”, “Track B” and “Set” buttons.
Rec Mode:
- Should be pressed before starting a track record. Then, track to be recorded can be selected.
- Allow to stop the track record.
Play/Rec Start:
- Start playing the selected recorded song
- Stop playing the selected recorded song
Track A:
- Select the track to record if even track
- Mute/demute even track of the selected track pair
Track B:
- Select the track to record if odd track
- Mute/demute odd track of the selected track pair
Set:
- Access to “Song select” and “Track pair select”. Displayed values can be changed with “Plus” and “Minus”
buttons.

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Below is an example on how to use the sequencer.
Select song 2
- Press “Set” button once. Display is “S n.1”. Press “Plus” button to display “S n.2”. Song #2 is selected.
Select track pair 3-4
Press “Set” button once. Display is “t.1.2”. Press “Plus” button to display “t.3.4”. Track pair 3-4 is selected.
You can switch back to tempo display by pressing few times “Set” button.
Record track 3:
- Press “Rec Mode” button. “Rec Mode” led is lit.
- Press “Track A” button. “Play/Rec Start” and “Track A“ leds are flashing.
- Note: At this step, track 3 record operation can be cancelled by pressing “Rec Mode” button.
- Start the recording by playing the keyboard or by pressing one pedal. “Play/Rec Start” led stops flashing
and stays lit.
- Stop recording by pressing the “Rec Mode” button. “Rec Mode” and “Play/Rec Start” leds are off.
Play track 3:
- “Track A” led is lit to show that there are data recorded in track 3.
- Press the “Play/Rec Start” button for playing what is recorded on track 3. The “Play/Rec Start” led is lit.
Record track 4:
- Press the “Rec Mode” button. “Rec Mode” and “Track A” leds are lit.
- Press the “Track B” button. “Play/Rec Start” and “Track B“ leds are flashing
- Note: At this step, track 4 record operation can be cancelled by pressing “Rec Mode” button.
- Start the recording by playing the keyboard or by pressing one pedal. “Play/Rec Start” led stops flashing
and stays lit.
- Stop recording by pressing the “Rec Mode” button. “Rec Mode” led is off.
Play track 3 and track 4:
- “Track A” led is lit to show that there are data recorded in track 3.
- “Track B” led is lit to show that there are data recorded in track 4.
- Press the “Play/Rec Start” button for playing what is recorded on track 3 and track 4. The “Play/Rec Start”
led is lit.
Delete song:
- Press “Set” button to get song selection menu. Use “Plus” and “Minus” buttons to select the song to delete.
- While keeping “Rec Mode” button pressed, press “Play/rec Start” button. Selected song is immediately
deleted.
Manual Drums:
Manual Drums function will select a Drum kit that can be played on keyboard. This feature can be used to record
Drum track (10) in sequencer.
- Press “Manual Drums” button to get drum kit instruments on keyboard. “Manual Drums” LED will turn on.
- Use “Instrument select” buttons to choose from the 8 available drum kits.
- Press “Manual Drums” button again to switch back to piano mode. “Manual Drums” LED will turn off.
Available drum kits are: o1: Standard Set
o2: Room Set
o3: Power Set
o4: Electric Set
o5: TR808 Set
o6: Jazz Set
o7: Brush Set
o8: Orchestra

2655PIA-DK_Rev0 – User’s Manual
2655PIA-DK Users Manual - Rev. 03/13 6© 2013 Dream S.A.S.
Sliders assign:
The two sliders can be allocated to various functions. To switch between the available functions:
- Press and hold the “Sliders Assign” button, then press the “Plus” or “Minus” button to choose the function
Available functions are
- Volume balance: Display is “b A L ”. Slider 1 is general volume for MIDI In and Style Player and Slider 2 is
volume Balance between the two sounds if in Split mode or in Dual Mode
Only if Style player
- Accompaniment volumes. Display is “A c c ”. Slider1 is Bass & Drums volume and slider 2 is volume for
the others 5 style player tracks.

2655PIA-DK_Rev0 – User’s Manual
2655PIA-DK Users Manual - Rev. 03/13 7© 2013 Dream S.A.S.
SDCard (SD) Functions
General information: In the current version, 2655PIA-DK firmware support SDCard with FAT16 (up to 4 GByte) or
FAT32 file systems.
Only Standard MIDIFile in format 0 are supported.
Up to 3 SMF can be stored at the same time in the internal memory. Maximum File size for one SMF loaded in
internal memory is 33 kByte
SD functions can be acceded by pressing repetitively on the “Set” button until the display shows “S d. C”.
Then following functions can be used:
SD Scroll:
Scroll across SDCard MIDIFiles.
- Press the first ”Instrument select” button. Display toggles between “F i l ” and “S.xx ” or “F.x x ” if one SD that
contains Standard MIDIFiles (SMF) is inserted in SDMMC socket. If no SD inserted or SD without SMF,
display will toggle between “F i l ” and “- - - “.
- Use “Plus” and “Minus” buttons to select the SMF that you want to play, to load or to delete.
SMF with name included 2 digits in 4th and 5th characters be displayed in format “S.x x ”. xx is the value of
the 2 digits in name.
Example: “SONG56.MID” will be displayed as “S.5 6 ”.
If name of SMF doesn’t include 2 digits in 4th and 5th characters, display will be “F.x x ”. xx is the value of
the index of the song in the SD directory.
Example: “PRELUDE.MID” can be displayed as “F.0 2 ”if it is referenced at the index 2 of the SD
directory.
Play File from SD:
When in SD Scroll mode you can play directly from SD the File that is currently displayed. For that, simply press
the “Play/Rec Start” button.
Load File from SD:
Load File from SD to internal memory. This menu can be reached only if SD that contains SMF is inserted
- Press the second ”Instrument select” button. Display toggles between “L d.F ” and “Y E S ”
- Pressing the “Plus” button now, will load the latest SMF that was selected with SD Scroll function to current
selected song of sequencer. If load operation succeeds, then display will go back to tempo.
If file is too big for internal memory, load operation will abort and display will show “b i g ”.
If file is not a valid SMF format 0, load operation will abort and display will show “b a d ”.
- Pressing the “Minus” button will cancel the Load operation and escape from SD Functions.
Save Song to SD:
Save the current sequencer Song to SD in SMF format. This menu can be reached only if unlocked SD that
contains SMF is inserted
- Press the third ”Instrument select” button. Display toggles between “S A.F ” and “S.0 0 ”
- Use “Plus” and “Minus” buttons to choose the number you will add in the song name. If display is “S.0 7 ”,
song will be saved on SD with name SONG07.MID.
- Press again the third ”Instrument select” button. Display toggles between “S A.F ” and “Y E S ”
- Pressing the “Plus” button now, will save the last selected sequencer song as SMF in SD.
- Pressing the “Minus“ button will cancel the Save operation and escape from SD Functions.
Delete SD File:
Delete File of SD. This menu can be reached only if unlocked SD that contain SMF is inserted
- Press the fourth “Instrument select” button. Display toggles between “d l.F ” and “Y E S ”
- Pressing the “Plus” button now, will delete the latest SMF that was selected with SD Scroll function
- Pressing the “Minus” button will cancel the Delete operation and escape from SD Functions.

2655PIA-DK_Rev0 – User’s Manual
2655PIA-DK Users Manual - Rev. 03/13 8© 2013 Dream S.A.S.
Advanced Functions
Some advanced functions can be configured by pressing repetitively on the “Set” button until the display shows
“F n c”.
Then following functions can be adjusted:
Lower Octave Shift:
Octave shift of the lower sound.
- Press the first ”Instrument select” button. Display toggles between “L.O.S " and “1”. Use “Plus” and “Minus”
buttons to select the octave shift in range (0-2)..
Damper Pedal Assign:
Damper pedal can be assigned to Upper sound or lower sound or to both.
- Press the second ”Instrument select” button. Display toggles between “d.P d " and “L _ U ”. It means that
Damper pedal is assigned to Upper and Lower sounds.
- Use “Plus” and “Minus” buttons to select “ _ U ” (Damper pedal assigned only for Upper sound) or “L _ ”
(Damper pedal assigned only for lower sound).
Temperament:
Various historical temperaments other than the modern “equal ” can be selected.
- Press the third ”Instrument select” button. Display toggles between “t M P " and “T P.1 ”. It means that
temperament #1 is currently selected.
- Use “Plus” and “Minus” buttons to select another temperament through the 7 available.
Available temperaments are:
oTP.1: Equal
oTP.2: Pythagorean
oTP.3: Pure Major
oTP.4: Pure Minor
oTP.5: Mean Tone
oTP.6: Werckmeister III
oTP.7: Kirnberger III
Root Note:
Root note should be specified for temperaments others than the Equal one.
- Press the fourth ”Instrument select” button. Display toggles between “r t.n " and “ C ”. It means that root note
for is currently selected temperament is C.
- Use “Plus” and “Minus” buttons to select another root note. “ C ‘ “ in display
Mike setting:
Mike can be connected on mike input
- Press the fifth ”Instrument select” button. Display shows“M i c ” on the LED display.
- Then press “Plus” button to put the mike input On with low reverb level. Display will be “M.i c ”.
- Pressing again “Plus” button again will increase the reverb level and display will be “M.i.c ”, then “M.i.c.”.

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Registrations
Presets can be stored in 8 Registrations. Registrations are memorized even after power off.
Registrations retain the following parameters:
oReverb Type
oReverb Volume
oChorus Type
oChorus Volume
oTouch Curve
oTempo
oUpper Sound
oLower Sound
oUpper Volume
oLower Volume
oSplit On/Off
oSplit point
oTranspose
oTune
oTemperament
oRoot Note
oLower Octave Shift
oDamper Pedal Assign
If 2655PIA-ST parameters below are also stored:
oStyle #
oVariation #
oStyle player 1 Volume (Bass & Drum)
oStyle player 2 Volume (All parts except Bass & Drum)
oRhythm Only On/Off
To save your current setting in one registration, do the next steps:
- Check that the “Registration” LED is off. If it is On, press the “Registration” button to quit the registration mode.
- Adjust all parameters until you get the setting that you want to save in one registration.
- Press and hold “Registration” button while you press one of the 8 “Instrument select” buttons. The current
setting is now stored in the registration corresponding to the “Instrument Select” button that you have pressed.
To recall a registration:
- Enter registration mode by pressing “registration” button. “Registration” LED is On to show that you are in
registration mode. By default Registration1 is recalled and LED of first ”Instrument Select” is On.
- To recall another registration, just press the corresponding “Instrument” select button.
To exit registration mode:
Press the “Registration” button to get the “Registration” LED Off

2655PIA-DK_Rev0 – User’s Manual
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MIDI
MIDI parameters can be configured by pressing repetitively on the “Set” button until the display shows “M i d ”.
Then following parameters can be adjusted:
Transmit channel:
Transmit channel is MIDI transmit channel for keyboard upper notes. Keyboard lower/dual notes will be transmitted
on next greater channel.
- Press the first ”Instrument select” button. Display toggles between “t r.C " and “1”. Use “Plus” and “Minus”
buttons to select the MIDI transmit channel in range“1-16”
Local Control On/Off:
Local Control On/Off function allows connecting or not the Sound engine to Keyboard. If Local Control is On
keyboard can play sound engine and send notes info to MIDI out. If Local Control is Off keyboard is not connected
to sound engine but it continues to send notes info to MIDI out.
- Press the second ”Instrument select” button. Display toggles between “L c l " and “On ”. Use “Plus” and
“Minus” buttons to set the Local control to “On” or “Off”
Program Change On/Off:
Program Change On/Off function decides if Program Change are received and transmitted by 2655PIA-DK.
- Press the third ”Instrument select” button. Display toggles between “P G.C " and “On ”. Use “Plus” and “Minus”
buttons to set value to “On” or “Off”
Factory Reset
2655PIA can be restored as it was at its first power-up by pressing the higher note of the keyboard while power-up.
Following actions will be done:
- Instruments will recover their factory effect and touch curve settings.
- Registrations will be restored to their factory default.
- All songs of Sequencer will be erased
Optional Functions (for 2655PIA-ST only)
Style player: Use “Intro_Ending”, “Fill-In”, “Start_Stop”, “Variation”, ”Rhythm Only”, “Style selection” buttons.
Easy Chord mode for beginners can be activated by pressing “Style selection” button, then “Set” button”
Style Selection: Press the “Style Selection” button then select with “Plus“ and “Minus” buttons.
0: EuroPop, 1: 90sDance,
2: KickDance, 3: 80sPop,
4: TechnoRock, 5: Country,
6: Beguine, 7: Bossa,
8: Blues, 9: JazzTet,
10: Rock&Roll, 11: Soca,
12: Lounge, 13: Waltzer
Recognized chords: MAJ, MIN, DOM, MIN7, MAJ7, MIN7b5, SUS4, DIM, AUG, MAJ6, MIN6, DOMSUS4

2655PIA-DK_Rev0 – User’s Manual
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4. Feature Table
FEATURES DETAILS
Sounds 8 sounds selectable from panel 128 GM sounds + 99 variations selectable from MIDI
Manual Drums
Memory for piano samples 8 MByte
Memory for GM sound + variations. 8 MByte
Sound Engine 32-parts Multitimbral high range Wavetable Synthesizer
Polyphony Up to 64 voices
Display 3-digit LED
Effect Reverb (Room1, Room2, Hall, Plate)
Chorus (Chorus1, Chorus2, Short Delay)
Metronome Time signature: 1/4, 2/4, 3/4, 4/4, 6/4, 6/8, 12/8 32-250 bpm
with volume control
Sequencer 3 songs, 4 dual tracks per song, 15 000 event per song
SMF format 0, storage in DataFlash
Demo 3 demo songs
Registrations 8 registrations for user
Storage in DataFlash
Touch Curve Soft, Medium, Hard, Constant (programmable from 0 to 127 by user)
Dual 2-sound layer with volume balance
Split Programmable Split point
Transpose -12 to +12 semi-tones
Tune 427 to 453 Hz
Temperaments Equal, Pythagorean, Pure Major, Pure Minor, Mean Tone, Werckmeister III, Kirnberger III
Programmable Root Note
USB (Optional) USB MIDI (needs Dream USB-DBG-IF interface)
Soundbank, Firmware, Demo and Style* update
SD Card
SDMMC socket.
SD Card support, up to 4 GByte
Save sequencer song in SMF format 0,
Read SMF, Load SMF format 0, Delete SMF
Style Player*
8-part, 2-group style player
1 volume per group
14 Styles with Intro, Ending, Fill in, Variation
Start-Stop, Rhythm Only, Easy Chord
Pedals Damper (4 levels), Sostenuto, Soft
Reset Recall of factory Registrations and settings
Production Test
Test for front panel: Leds, Display, Switches, Pedals, Sliders
Test for soundboard components: SAM2655, DataFlash, Flash,
MIDI test
Play sine wave for audio test
Mike Input mike input with reverb
* Only implemented in 2655PIAST-C-PDK

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5. Synthesizer Tracks mapping table
2655PIA firmware has a built in 32-tracks GM synthesizer. Mapping of the sound tracks is shown in the table below:
Sound Player Track number (0-31)
Keyboard Single or Upper Sound 0
Keyboard Dual Sound 1
Keyboard Lower Sound 2
Demo tracks 7-14
Piano Sequencer dual tracks 1-4 7-14
Metronome 15
Style Player 24-31
MIDI File Player 16-31
MIDI IN 16-31
6. 2655PIA DSP Modules and Audio Routings
AudioIn
GMFX
GMSynth
--> Main Out L/R
--> Rev Send Out
--> Chr Send Out
Main Out
L/R
Reverb
Chorus
MAIN1
MAIN2
FX1
FX2
DABD0_L
DAAD0_L
Mike Input
Inp
Mix
DABD0_R
Reverb send
Piano keyboard tracks
Piano sequencer tracks
Demo tracks
MIDI tracks
SMF player tracks
Style player tracks

2655PIA-DK_Rev0 – User’s Manual
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7. MIDI Implementation
7.1. Detailed MIDI Implementation
MIDI
MESSAGE HEX CODE DESCRIPTION
NOTE ON 9nH kk vv Midi channel n(0-15) note ON #kk(1-127), velocity vv(1-127). vv=0 means
NOTE OFF
NOTE OFF 8nH kk vv Midi channel n(0-15) note OFF #kk(1-127),
vv is don’t care.
PITCH BEND EnH bl bh Pitch bend as specified by bh|bl (14 bits)
Maximum swing is +/- 1 tone (power-up). Can be changed using « pitch bend
sensitivity ». Center position is 00H 40H.
PROGRAM
CHANGE CnH pp Program (patch) change. Specific action on channel 10 (n=9) : select drumset. Refer to sounds / drumset list. Drumsets can be assigned to other
channels (see SYSEX MIDI channel to part assign and part to rhythm
allocation)
CHANNEL
AFTERTOUCH DnH vv vv pressure value. Effect set using Sys. Ex. 40H 2nH 20H-26H
MIDI RESET FFH Reset to power-up condition
CTRL 00 BnH 00H cc Bank select : Refer to sounds list. No action on drumset. cc=64 reserved for
dream sound editor
CTRL 01 BnH 01H cc Modulation wheel. Rate and maximum depth can be set using SYSEX
CTRL 05 BnH 05H cc Portamento time.
CTRL 06 BnH 06H cc Data entry : provides data to RPN and NRPN
CTRL 07 BnH 07H cc Volume (default=100)
CTRL 10 BnH 0AH cc Pan (default=64 center)
CTRL 11 BnH 0BH cc Expression (default=127)
CTRL 64 BnH 40H cc Sustain (damper) pedal
CTRL 65 BnH 41H cc Portamento ON/OFF
CTRL 66 BnH 42H cc Sostenuto pedal
CTRL 67 BnH 43H cc Soft pedal
CTRL 80 BnH 50H vv Reverb program vv=00H to 07H (default 04H)
00H: Room1 01H: Room2
02H: Room3 03H: Hall1
04H: Hall2 05H: Plate
06H: Delay 07H: Pan delay
CTRL 81 BnH 51H vv Chorus program vv=00H to 07H (default 02H)
00H: Chorus1 01H: Chorus2
02H: Chorus3 03H: Chorus4
04H: Feedback 05H: Flanger
06H: Short delay 07H: FB delay
CTRL 91 BnH 5BH vv Reverb send level vv=00H to 7FH
CTRL 93 BnH 5DH vv Chorus send level vv=00H to 7FH
CTRL 98 BnH 62H vv Nrpn LSB
CTRL 99 BnH 63H vv Nrpn MSB
CTRL 100 BnH 64H vv Rpn LSB
CTRL 101 BnH 65H vv Rpn MSB
CTRL 120 BnH 78H 00H All sound off (abrupt stop of sound on channel n)
CTRL 121 BnH 79H 00H Reset all controllers
CTRL 122 BnH 7AH vv Local ON/OFF: OFF if vv=0, ON else
CTRL 123 BnH 7BH 00H All notes off
CTRL 126 BnH 7EH 00H Mono on
CTRL 127 BnH 7FH 00H Poly on (default power-up)
(to be continued)

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(continued)
MIDI
MESSAGE HEX CODE DESCRIPTION
CTRL CC1 BnH ccH vvH Assignable Controller 1. cc=Controller number (0-5Fh), vv=Control value (0-
7Fh). Control number (ccH) can be set on CC1 CONTROLLER NUMBER
(Sys. Ex 40 1x 1F). The resulting effect is determined by CC1 controller
function (Sys.Ex. 40 2x 40-4A)
CTRL CC2 BnH ccH vvH Assignable Controller 2. cc=Controller number (00h-5Fh), vv=control value (0-
7Fh). Control number can be set on CC2 CONTROLLER NUMBER (Sys.Ex.
40 1x 20). The resulting effect is determined by CC2 controller function
(Sys.Ex.40 2x 50-5A).
RPN 0000H BnH 65H 00H 64H 00H 06H vv Pitch Bend Sensitivity: vv=00 to 18H (+00 to +24 semitones) (default=2)
RPN 0001H BnH 65H 00H 64H 01H 06H vv Fine tuning in cents (vv=00 -100, vv=40H 0, vv=7FH +100
RPN 0002H BnH 65H 00H 64H 02H 06H vv Coarse tuning in half-tones (vv=00 -64, vv=40H 0, vv=7FH +64
NRPN 0108H BnH 63H 01H 62H 08H 06H vv Vibrate rate modify (vv=40H -> no modif)
NRPN 0109H BnH 63H 01H 62H 09H 06H vv Vibrate depth modify (vv=40H -> no modif)
NRPN 010AH BnN 63H 01H 62H 0AH 06H vv Vibrate delay modify (vv=40H -> no modif)
NRPN 0120H Bnh 63H 01H 62H 20H 06H vv TVF cutoff freq modify(vv=40H -> no modif)
NRPN 0121H BnH 63H 01H 62H 21H 06H vv TVF resonance modify (vv=40H -> no modif)
NRPN 0163H Bnh 63H 01H 62H 63H 06H vv Env. attack time modify(vv=40H ->no modif)
NRPN 0164H BnH 63H 01H 62H 64H 06H vv Env. decay time modify(vv=40H -> no modif)
NRPN 0166H BnH 63H 01H 62H 66H 06H vv Env. release time modif(vv=40H ->no modif)
NRPN 18rrH BnH 63H 18H 62H rr 06H vv Pitch coarse of drum instr. note rr in semitones (vv=40H -> no modif)
NRPN 1ArrH BnH 63H 1AH 62H rr 06H vv Level of drum instrument note rr (vv=00 to 7FH)
NRPN 1CrrH BnH 63H 1CH 62H rr 06H vv Pan of drum instrument note rr (40H = middle)
NRPN 1DrrH BnH 63H 1DH 62H rr 06H vv Reverb send level of drum instrument note rr (vv=00 to 7FH)
NRPN 1ErrH BnH 63H 1EH 62H rr 06H vv Chorus send level of drum instrument note rr (vv=00 to 7FH)
NRPN 3751H BnH 63H 37H 62H 51H 06H 23H Auto- test. See paragraph 7.2
Standard Sysex F0H 7EH 7FH 09H 01H F7H General MIDI reset
Standard Sysex F0H 7FH 7FH 04H 01H 00H ll F7H Master volume (ll=0 to 127, default 127)
SYSEX F0H 41H 00H 42H 12H 40H 00H 00H dd
dd dd dd xx F7H Master tune (default dd= 00H 04H 00H 00H) -100.0 to +100.0 cents. Nibblized data should be used (always four bytes). For example, to tune to +100.0
cents, sent data should be 00H 07H 0EH 08H
SYSEX F0H 41H 00H 42H 12H 40H 00H 04H vv
xx F7H Master volume (default vv=7FH)
SYSEX F0H 41H 00H 42H 12H 40H 00H 05H vv
xx F7H Master key-shift (default vv=40H, no transpose)
SYSEX F0H 41H 00H 42H 12H 40H 00H 06H vv
xx F7H Master pan (default vv=40H, center)
SYSEX F0H 41H 00H 42H 12H 40H 00H 7FH
00H xx F7H GS reset
SYSEX F0H 41H 00H 42H 12H 40H 01H 30H vv
xx F7H Reverb type (vv=0 to 7), default = 04H
00H: Room1 01H: Room2
02H: Room3 03H: Hall1
04H: Hall2 05H: Plate
06H: Delay 07H: Pan delay
SYSEX F0H 41H 00H 42H 12H 40H 01H 31H vv
xx F7H Reverb character, default 04H
SYSEX F0H 41H 00H 42H 12H 40H 01H 32H vv
xx F7H Reverb Pre-LPF, 0 to 7, default = 0
SYSEX F0H 41H 00H 42H 12H 40H 01H 33H vv
xx F7H Reverb master level, default = 64
SYSEX F0H 41H 00H 42H 12H 40H 01H 34H vv
xx F7H Reverb time
SYSEX F0H 41H 00H 42H 12H 40H 01H 35H vv
xx F7H Reverb delay feedback. Only if reverb number=6 or 7 (delays)
(to be continued)

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(continued)
MIDI
MESSAGE HEX CODE DESCRIPTION
SYSEX F0H 41H 00H 42H 12H 40H 01H 38H vv
xx F7H Chorus type (vv=0 to 7), default = 02H
00H: Chorus1 01H: Chorus2
02H: Chorus3 03H: Chorus4
04H: Feedback 05H: Flanger
06H: Short delay 07H: FB delay
SYSEX F0H 41H 00H 42H 12H 40H 01H 39H vv
xx F7H Chorus Pre-LPF, 0 to 7, default = 0
SYSEX F0H 41H 00H 42H 12H 40H 01H 3AH vv
xx F7H Chorus master level, default = 64
SYSEX F0H 41H 00H 42H 12H 40H 01H 3BH vv
xx F7H Chorus feedback
SYSEX F0H 41H 00H 42H 12H 40H 01H 3CH vv
xx F7H Chorus delay
SYSEX F0H 41H 00H 42H 12H 40H 01H 3DH vv
xx F7H Chorus rate
SYSEX F0H 41H 00H 42H 12H 40H 01H 3EH vv
xx F7H Chorus depth
SYSEX F0H 41H 00H 42H 12H 40H 1pH 02H nn
xx F7H MIDI channel to Part assign, p is part number (0H to FH), nn is MIDI channel (0H to FH, 10H=OFF).
This SYSEX allows to assign several parts to a single MIDI channel or to mute
a part.
Relation between Block Number and Part number:
Part MIDI channel (1 to 16)
0H 10 (DRUMS)
1H-9H 1-9
AH-FH 11-16
SYSEX F0H 41H 00H 42H 12H 40H 1pH 15H vv
xx F7H Part to rhythm allocation, p is part (0H to FH), vv is 00 (sound part) or 01 (rhythm part).
This SYSEX allows a part to play sound or drumset. There is no limitation of
the number of parts playing drumset.
Default assignment: block 0H plays drums (default MIDI channel 10) all other
parts play sound.
SYSEX F0H 41H 00H 42H 12H 40H 1pH 40H v1
v2 ... v12 xx F7H Scale tuning, p is part (0H to FH), v1 to v12 are 12 semi-tones tuning values (C, C#, D, ... A#, B), in the range -64 (00H)
0 (40H) +63(7FH) cents.
This SYSEX allows non chromatic tuning of the musical scale on a given MIDI
channel.
Default v1, v2, ... ,v12 = 40H, 40H,...,40H (chromatic tuning).
Scale tuning has no effect if the part is assigned to a rhythm channel or if the
sound played is not of chromatic type.
SYSEX F0H 41H 00H 42H 12H 40H 1pH 1AH vv
xx F7H Velocity slope from 00H to 7FH (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 1pH 1BH vv
xx F7H Velocity offset from 00H to 7FH (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 1pH 1FH vv
xx F7H CC1 Controller number (00-5FH) (default = 10H)
SYSEX F0H 41H 00H 42H 12H 40H 1pH 20H vv
xx F7H CC2 Controller number (00-5FH) (default = 11H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 00H vv
xx F7H Mod pitch control (-24,+24 semitone) (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 01H vv
xx F7H Mod tvf cutoff control (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 02H vv
xx F7H Mod Amplitude control (-100%-+100%) (default=40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 03H vv
xx F7H Mod lfo1 rate control (default = 40H). n is don’t care. Rate is common on all channels
SYSEX F0H 41H 00H 42H 12H 40H 2pH 04H vv
xx F7H Mod lfo1 pitch depth (0-600 cents) (default=0AH)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 05H vv
xx F7H Mod lfo1 tvf depth (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 06H vv
xx F7H Mod lfo1 tva depth (0-100%) (default = 0H)
(to be continued)

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(continued)
MIDI
MESSAGE HEX CODE DESCRIPTION
SYSEX F0H 41H 00H 42H 12H 40H 2pH 10H vv
xx F7H Bend pitch control (-24,+24 semitone) (default = 42H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 11H vv
xx F7H Bend tvf cutoff control (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 12H vv
xx F7H Bend Amplitude control (-100%-+100%) (default=40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 14H vv
xx F7H Bend lfo1 pitch depth (0-600 cents) (default=0AH)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 15H vv
xx F7H Bend lfo1 tvf depth (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 16H vv
xx F7H Bend lfo1 tva depth (0-100%) (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 20H vv
xx F7H CAF pitch control (-24,+24 semitone) (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 21H vv
xx F7H CAF tvf cutoff control (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 22H vv
xx F7H CAF Amplitude control (-100%-+100%) (default=40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 24H vv
xx F7H CAF lfo1 pitch depth (0-600 cents) (default=0AH)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 25H vv
xx F7H CAF lfo1 tvf depth (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 26H vv
xx F7H CAF lfo1 tva depth (0-100%) (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 40H vv
xx F7H CC1 pitch control (-24,+24 semitone) (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 41H vv
xx F7H CC1 tvf cutoff control (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 42H vv
xx F7H CC1 Amplitude control (-100%-+100%) (default=40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 44H vv
xx F7H CC1 lfo1 pitch depth (0-600 cents) (default=0AH)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 45H vv
xx F7H CC1 lfo1 tvf depth (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 46H vv
xx F7H CC1 lfo1 tva depth (0-100%) (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 50H vv
xx F7H CC2 pitch control (-24,+24 semitone) (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 51H vv
xx F7H CC2 tvf cutoff control (default = 40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 52H vv
xx F7H CC2 Amplitude control (-100%-+100%) (default=40H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 54H vv
xx F7H CC2 lfo1 pitch depth (0-600 cents) (default=0AH)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 55H vv
xx F7H CC2 lfo1 tvf depth (default = 0H)
SYSEX F0H 41H 00H 42H 12H 40H 2pH 56H vv
xx F7H CC2 lfo1 tva depth (0-100%) (default = 0H)
Notes:
1. NRPN sending method: CTRL#99=high byte, CTRL#98=low byte, CTRL#6=vv
Example: NRPN 0108H = 40H -> CTRL#99=1, CTRL#98=8, CTRL#6=64
2. x or xx means « don’t care »
3. For all SYSEX, starting of message:
F0h 41h 00h 42h 12h 40h … (Roland type)
can be changed also to
F0h 00h 20h 00h 00h 00h 12h 40h … (Dream type)

2655PIA-DK_Rev0 – User’s Manual
2655PIA-DK Users Manual - Rev. 03/13 17 © 2013 Dream S.A.S.
8. Production Test
8.1. Overview
Production test is implemented in firmware. It allows easily testing of each manufactured device at the final step of
production.
8.2. Starting Production Test
While starting-up the 2655PIA-DK board, press highest F# and C for 2 seconds. Display and LEDs go to off state.
8.3. LEDs and switches test
Switches with one LED (excepted instrument select switches): Press each switch to test it and its LEDs. LED is on
when switch is pressed and off when switch is released.
Switches with more than one LED: Press few times the same switch until you have seen each LED on and off.
Switches without LED: Press the switch 8 times and check each time if one segment is on in the display.
- SET switch is for high digit test
- MINUS switch is for medium digit test
- PLUS switch is for low digit test
Instrument select switches: Press switch to test its LED. LED stays on until another instrument switch is pressed.
8.4. Sliders test
Slider 1: Press Instrument 1 switch. Instrument 1 LED is on. Move slider 1 from left to right. Display shows values
increasing regularly from 0 to 127
Slider 2: Press Instrument 2 switch. Instrument 2 LED is on. Move slider 2 from left to right. Display shows values
increasing regularly from 0 to 127
8.5. Pedal test
Soft pedal (left): Press Instrument 3 switch. Instrument 3 LED is on. Press pedal. If pedal is simple switch, display
shows 0 when pedal is released and 127 when pedal is depressed. If pedal is analog system, display will show 4
values: 0 then 64 then 80 then 127.
Sostenuto pedal (middle): Press Instrument 4 switch. Instrument 4 LED is on. Display shows 0 when pedal is
released and 127 when pedal is depressed.
Damper pedal (right): Press Instrument 5 switch. Instrument 5 LED is on. Press pedal. If pedal is simple switch,
display shows 1 when pedal is released and 127 when pedal is depressed. If pedal is analog system, display will
show 4 values: 1 then 78 then 90 then 110.
8.6. MIDI test
The purpose of this test is to validate MIDI IN path, MIDI IN socket and MIDI OUT path, MIDI OUT socket.
- Connect MIDI IN to MIDI OUT with MIDI cable.
- Press Instrument 6 switch. Instrument 6 LED is on
- Display show “Mid” if test passes or “bAd” if test fails.

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8.7. Components test
Components test will automatically and consecutively test DataFlash device, each of the parallel ROM or Flash
devices and Firmware integrity. Even if Firmware is part of the first ROM or flash device, it should be checked
separately
To start component test press and hold MINUS switch then also press PLUS switch.
Firmware enters in component test and display shows:
- “dFl” while DataFlash is under test
- “rOM” while ROM or Flash devices are under test
- “Fir” while Firmware integrity is under test
When test is ended, state of the 5 first Intrument LEDs shows the test result. If the 5 LEDs are on then all
components test were successfully passed.
- If Inst 1 LED is off then DataFlash test was fail
- If Inst 2 LED is off then ROM or Flash device test was fail
- If Inst 6 LED is off then Firmware test was failed
Warning: ROM and Firmware test can be passed with success only if binary files for ROM or FLASH devices have
been created with Dream “MakeROM.exe” tool.
8.8. SAM2655 test
SAM2655 test will test internal chip elements.
To start component test press and hold MINUS switch then also press PLUS switch.
Steps are:
1-Play sine wave at 1.5kHz frequency
2-Test 32kx16 RAM
3-Change sine wave frequency to 750Hz
If test is success then a full scale, 750Hz, sine wave signal will be generated on main audio L and R output. It could
be useful for checking analog output stage of the product
Warning: Firmware stays in an endless loop at the end of the test. To recover normal playing mode, product should
be restarted.

2655PIA-DK_Rev0 – User’s Manual
2655PIA-DK Users Manual - Rev. 03/13 19 © 2013 Dream S.A.S.
Dream Contact
[email protected]
Website
http://www.dream.fr
This publication neither states nor implies any warranty of any kind, including, but not limited to, implied warrants of merchantability or fitness for
a particular application. Dream assumes no responsibility for the use of any circuitry. No circuit patent licenses are implied.
The information in this publication is believed to be accurate in all respects at the time of publication but is subject to change without notice.
Dream assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the information
included herein.
© Copyright 2013 Dream S.A.S. France