BOSSCO DD-7 Digital Delay User manual

Owner’s Manual
English
Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY”
and “IMPORTANT NOTES”(supplied on a separate sheet).
After reading, keep the document(s) where it will be available for immediate
reference.

2
Panel DescriptionsMain Features
5
3
1
4
6
7
2
7Achieves long delay times of up to 6.4 seconds. (*1) What’s
more, up to 40 seconds of loop play—or “sound on sound”—is
possible in HOLD mode.
7Multiple delay modes include “MODULATE,”which adds a
chorus eect to the delay sound, and“ANALOG,” which models
the classic BOSS DM-2 analog delay pedal.
7Features two new stereo modes in addition to 2-in/2-out true
stereo connections.
7Provides stereo eects like “Panning”and “Eect + Direct.”
7Parameters can be controlled using an optional expression
pedal (Roland EV-5).
7The delay time can be set in realtime by pressing an optional
footswitch (FS-5U) or the built-in pedal to input the tempo.
(*1) The delay time that can be set varies according to the mode.

Panel Descriptions
3
English
1. DC IN jack
Accepts connection of an AC Adaptor (PSAseries; optional). By using
an AC Adaptor, you can play without being concerned about how
much battery power you have left.
* If there are batteries in the unit while an AC adaptor is being
used, normal operation will continue should the line voltage
be interrupted (power blackout or power cord disconnection).
* Use only the specied AC adaptor (PSA-series).
* If the AC adaptor is connected while power is on, the power
supply is drawn from the AC adaptor.
2. CHECK indicator
This is a combination indicator, which indicates whether the eect
is on or o, indicates the various functions, and functions as the
battery check indicator.
The indicator lights when an eect is ON.
* If this indicator goes dim or no longer lights while an eect
is ON, or when the functions are indicated, the battery is
near exhaustion and should be replaced immediately. For
instructions on changing the batteries, refer to“Changing the
Battery” (p. 20).
* The CHECK indicator shows whether the eect is on or o, and
indicates the dierent functions. It does not indicate whether
the power to the device is on or not.
3. OUTPUT-A (MONO) jack
OUTPUT-B jack
The output jacks are used to connect the unit to an amplier or
another eects unit.
* The unit’s functions dier according to how it is connected.
Refer to“Setting the Output Method” (p. 13).
4. INPUT-A (MONO) jack
INPUT-B jack
These jacks accept input signals (coming from a guitar, some other
musical instrument, or another eects unit).
* The unit’s functions dier according to how it is connected.
Refer to“Setting the Output Method” (p. 13).
* The INPUT-A (MONO) and INPUT-B jacks double as power
switches. Power to the unit is turned on when you plug into
the INPUT-A (MONO) or INPUT-B jack; the power is turned o
when the cable is unplugged. Be sure to disconnect any cord
plugged into the INPUT-A (MONO) or INPUT-B jack when not
using this eects device.

Panel Descriptions
4
5. TEMPO/EXP jack
This jack is for connecting an optional external footswitch (FS-5U) or
an optional expression pedal (Roland EV-5).
You can make tempo settings using a footswitch or manipulate
various parameters using an expression pedal.
* Refer to“Setting the Tempo Using an External Footswitch” (p.
10), “Control Using an Expression Pedal”(p. 17).
6. Pedal switch
This is used for switching the eect on and o, and for switching
between the dierent functions.
7. Thumbscrew
When this screw is loosened, the pedal will open, allowing you to
change the battery.
* For instructions on changing the battery, refer to“Changing
the Battery” (p. 20).
9 10 118
8. E.LEVEL (Eect Level) knob
This adjusts the volume of the eect sound. Turn the knob clockwise
to increase the eect sound. When set at the three o’clock position,
the eect is played at the same volume as the direct sound.
* When the E.LEVEL knob is set to MAX while in REVERSE mode,
only the eect sound is output, with the eect sound at the
same level as the input sound.

Panel Descriptions
5
English
9. F.BACK (Feedback) knob
This adjusts the feedback level. The number of times the delay
sound is repeated increases as the knob is turned to the right.
* This cannot be used in HOLD mode.
* Oscillation may occur when the knob is set at certain
positions.
10.D.TIME (Delay Time) knob
This adjusts the delay time. Turning the knob clockwise lengthens
the delay time.
* This cannot be used in HOLD mode.
* The delay times that can be set vary according to the position
of the MODE knob.
11.MODE knob
This switches the delay eect.
Ordinary Delay
MODE Knob Delay Time
3200 ms 800–3200 ms
800 ms 200–800 ms
200 ms 50–200 ms
50 ms 1–50 ms
* The delay time is doubled when the DD-7 is connected for
long delay output. For more information, refer to“Long” (p.
14).
Specialized Delays
MODE Knob Delay Time
HOLD 40 sec. *1
MODULATE 20–800 ms
ANALOG 20–800 ms
REVERSE 300–3200 ms
*1 In HOLD mode, the maximum recording time is 20 seconds for
stereo input or 40 seconds for monaural input.
* The delay time is doubled when the DD-7 is connected for
long delay output. For more information, refer to“Long” (p.
14).
HOLD:
This records up to 40 seconds of a performance (when using
monaural input), then plays it back repeatedly.
* For details, refer to“Using the HOLD (Overdubbing) Function”
(p. 12).
MODULATE:
This produces a pleasant chorus eect by adding a small amount of
undulations to the eect sound.
ANALOG:
The sound changes progressively with each repetition of the repeat
sound. This tone is modeled on the BOSS “DM-2” Compact Delay.

Panel Descriptions
6
REVERSE:
This delay produces an eect like playing back a tape in reverse.
You can adjust the E.LEVEL knob setting to get two dierent kinds
of eect, “Eect Sound + Direct Sound” and “Eect Sound Only.”
Turning the E.LEVEL knob completely to the right switches this to
“Eect Sound Only.”

7
English
AC Adaptor
(PSA-series: optional)
Keyboard
Electric
Guitar
Guitar Amplier
Expression pedal
(Roland EV-5)
Footswitch
(FS-5U)
Connections
You can obtain a variety of dierent delay eects by
changing how the connections are made. For more
information, refer to “Setting the Output Method”
(p. 13).

Panel Descriptions
8
* When running the unit on battery power, inserting a plug into the INPUT-A (MONO) or INPUT-B jack will automatically switch the
unit on.
* Before turning the unit on/o, always be sure to turn the volume down. Even with the volume turned down, you might hear some
sound when switching the unit on/o. However, this is normal and does not indicate a malfunction.
* This unit is equipped with a protection circuit. A brief interval (a few seconds) after power up is required before the unit will operate
normally.
* The use of an AC adaptor is recommended as the unit’s power consumption is relatively high. Should you prefer to use batteries,
please use the alkaline type.
* To prevent malfunction and equipment failure, always turn down the volume, and turn o all the units before making any
connections.
* Some connection cables contain resistors. When connection cables with resistors are used, the sound level may be extremely low, or
impossible to hear. For information on cable specications, contact the manufacturer of the cable.
* We recommend that you keep batteries installed in the unit even though you’ll be powering it with the AC adaptor. That way, you’ll
be able to continue a performance even if the cord of the AC adaptor gets accidentally disconnected from the unit.
* Once the connections have been completed, turn on power to your various devices in the order specied. By turning on devices in
the wrong order, you risk causing malfunction and/or damage to speakers and other devices.
• When powering up: Turn on the power to your guitar amp last
• When powering down: Turn o the power to your guitar amp rst
* When operating on battery power only, the unit’s indicator will become dim when battery power gets too low. Replace the battery
as soon as possible.

9
English
Operating the Unit
4 3 25
1. Turn on the eect
After you have nished making the connections, press the pedal
switch to turn the eect on (the CHECK indicator lights red).
* The DD-7 features a“seamless switching function”whereby
the delay sound decays gradually, even after the eects are
switched o.
* When in HOLD mode, the eect cannot be switched on or o.
* You can obtain a variety of dierent delay eects by changing
how the connections are made. For more information, refer to
“Setting the Output Method” (p. 13).
2. Select the mode
Use the MODE knob to select the mode to be used.
* Operations vary according to the mode. Refer to each
operation.
3. Adjust the delay time
Adjust the delay time with the D.TIME knob.
4. Adjust the feedback level
Use the F.BACK knob to adjust the feedback level (or how much the
sound is repeated).
* Oscillation may occur with certain input sounds, or when the
knob is set at certain positions.
5. Adjust the volume
Adjust the volume level of the eect sound with the E.LEVEL knob.

10
Using the Tempo Delay
Tempo input allows you to set the delay time to match the tempo
of a song by repeatedly pressing the pedal switch in time with the
desired tempo. You can also use this method to change the delay
time to any setting you like as you perform.
Using tempo input, the delay time can be set within the range of
0.2–3.2 seconds.
* With long delay, the maximum setting is 6.4 seconds.
Setting the tempo using the built-in pedal
1. Select the mode
Use the MODE knob to select the mode to be used.
* Tempo input cannot be used in HOLD mode.
2. Switch to TEMPO mode
Hold down the pedal switch for at least two seconds (the CHECK
indicator lights green).
* When an optional external footswitch (the FS-5U) is
connected to the TEMPO/EXP jack, you won't be able to enter
TEMPO mode by pressing the built-in pedal.
3. Begin inputting the tempo
Press the pedal switch in time with the song tempo (the CHECK
indicator ashes red and green).
* The timing with which you press the pedal is converted to
quarter-note beats.
4. Finish inputting the tempo
Hold down the pedal switch for at least two seconds to complete
the setting (the CHECK indicator lights red).
* The tempo may become confused momentarily when you go
from Step 3 to Step 4.
* Turning the D.TIME knob resets the delay time to that
indicated by the knob’s position.
Setting the Tempo Using an External Footswitch
Connecting an optional footswitch (FS-5U) to the TEMPO/EXP jack
lets you set the tempo delay by inputting the tempo.
* You can input the tempo with the external pedal regardless of
whether the eect is on or o.
1. Connect the FS-5U to the TEMPO/EXP jack
* Use a connecting cord with a 1/4”phone plug.
* On the FS-5U, move the polarity switch toward the jack.
* The FS-5L cannot be used.

Using the Tempo Delay
11
English
2. Select the mode
Use the MODE knob to select the mode to be used.
* Inputting the tempo is not possible in HOLD mode.
3. Start inputting the tempo
Press the pedal switch in time with the song’s tempo (Eect o:
CHECK indicator ashes red; eect on: CHECK indicator ashes red
and green).
* The timing with which you press the pedal is converted to
quarter-note beats.
* Tempo input using the built-in pedal is not possible.
* Turning the D.TIME knob resets the delay time to that
indicated by the knob’s position.
The delay sound produced is as shown in the gure.
* The CHECK indicator ashes red in time with the interval with
which you press the pedal.
MODE: 3200 ms
MODE: 800 ms
MODE: 200 ms
MODE: 50 ms
MODE: MODULATE
ANALOG
REVERSE
Rhythm Used in
Pressing the Pedal
* When the mode is MODULATE, ANALOG, or REVERSE, the
eect at the position of the MODE knob is applied to the
delay sound.

12
Using the HOLD (Overdubbing) Function
With the HOLD function, you can record up to 40 seconds of your
performance, and then have that content played back repeatedly.
You can also layer this as you perform something else, then record
these together (overdub).
You can keep the recorded content playing continuously as backing
and produce other special eects.
1. Select HOLD
Set the MODE knob to HOLD (the CHECK indicator goes out).
2. Begin recording
Recording starts when you press the builtin pedal switch (the
CHECK indicator ashes red).
* The maximum recording time is 20 seconds for stereo input or
40 seconds for monaural input.
* Recording continues even if you release the built-in pedal
switch.
3. When recording is nished, playback starts
Press the built-in pedal switch a second time to stop recording.
Playback of what you recorded begins simultaneously (the CHECK
indicator ashes green).
4. Overdubbing
Press the pedal switch during playback to start overdubbing (The
CHECK indicator ashes orange).
5. When overdubbing is nished, playback starts
Pressing the built-in pedal switch during overdubbing stops
overdubbing, and playback resumes (the CHECK indicator ashes
green).
6. Adjust the volume
Use the E.LEVEL knob to adjust the volume of the playback sound.
7. Finish playback
To stop playback, press the pedal twice.
* Press the pedal two times in succession, keeping the interval
between presses to one second or less.
* If a footswitch (FS-5U ; optional) is connected to the TEMPO/
EXP jack, you can stop playback by pressing the FS-5U.

13
English
Setting the Output Method
With the DD-7, you can obtain a variety of dierent delay eects by
changing how the connections are made.
Panning
This produces panning delay with A input and A/B output.
Guitar Amplier GuitarDD-7
AA
B
* The panning feature is not available in HOLD mode.
Eect + Direct
This produces eect + direct output with B input and A/B output.
A
B B
(Eect sound) DD-7 Guitar
Guitar Amplier
(Direct sound)
* A: eect, B: direct
* Switching o the eect outputs the direct sound from A.

Setting the Output Method
14
Long
This produces long delay with A input and B output.
Guitar Amplier GuitarDD-7
A
B
MODE Normal Delay Long Delay
3200ms 800–3200 ms 1600–6400 ms
800ms 200–800 ms 400–1600 ms
200ms 50–200 ms 100–400 ms
50ms 1–50 ms 2–100 ms
HOLD 40 sec. *1 40 sec.
MODULATE 20–800 ms 40–1600 ms
ANALOG 20–800 ms 40–1600 ms
REVERSE 300–3200 ms 600–6400 ms
*1 In HOLD mode, the maximum recording time is 20 seconds for
stereo input or 40 seconds for monaural input.
Stereo
This produces stereo delay with A/B input and A/B output.
A
BB
A
Guitar Amplier GuitarEector
(chorus,
anger etc.)
Keyboard
DD-7
* You can select any of three types of stereo delay modes.
For more information, refer to“Setting the Mode for Stereo
Delay” (p. 16).

Setting the Output Method
15
English
Eect
This produces eect output with B input and A output.
A
B
Guitar Amplier Guitar
DD-7
RETURN SEND
INPUT
* The direct sound is not output from A, regardless of whether
the eect is on or o.
* Be sure to lower the output level of any device being
connected.

16
Setting the Mode for Stereo Delay
When using the DD-7 as a stereo delay, you can choose among
three dierent operation modes. Each mode provides a dierent
type of stereo delay eect.
* For detailed information on how to make the connections for
stereo delay, refer to “Stereo” (p. 14).
1. Make the connection to the INPUT-A (MONO) jack
and leave nothing connected to the INPUT-B jack
2. Hold down the built-in pedal and insert the plug to
INPUT-B jack
The setting mode for stereo delay is enabled, and the CHECK
indicator lights in orange.
3. Select the stereo delay eect
Use the MODE knob to select the mode for stereo delay.
3200ms: This is a completely independent delay for A and B.
800ms: This is panning delay.
200ms: This is a stereo delay that imparts spatial broadness to
reverberant sound.
4. Save the settings
Press the built-in pedal switch to make the CHECK indicator rapidly
ash in orange and save the settings.
After the settings have been saved, the unit returns to normal
operation.
* Never switch o the power while the CHECK indicator is
ashing rapidly.
* This setting is retained even while the power is turned o.

17
English
Control Using an Expression Pedal
Connecting an expression pedal (Roland EV-5; optional) to the
TEMPO/EXP jack enables you to control the respective parameters
of the E.LEVEL, F.BACK, and D.TIME knobs.
* Use only the specied expression pedal. By connecting any
other expression pedals, you risk causing malfunction and/or
damage to the unit.
Making the Settings for Expression Pedal Functions
1. Hold down the built-in pedal and connect the
expression pedal
The function-setting mode for the expression pedal is enabled and
the CHECK indicator lights in orange.
* The setting mode cannot be entered while HOLD MODE is
selected.
* When connecting an expression pedal to the TEMPO/EXP jack,
set the minimum volume for the connected expression pedal
to the “MIN” position.
2. Make the settings for the parameters
Turn the E.LEVEL, F.BACK, and D.TIME knobs to set the maximum
values of the ranges you want to control. If you don’t want to control
a particular parameter with the expression pedal, set its value to the
“MIN” position.
* You can set only the maximum value of a parameter range
controlled using the expression pedal. Setting the minimum
value is not possible.
3. Save the parameters
Press the built-in pedal switch to make the CHECK indicator rapidly
ash in orange and save the settings.
After the settings have been saved, the unit returns to normal
operation.
* Never switch o the power while the CHECK indicator is
ashing rapidly.
* This setting is retained even while the power is turned o.

18
Attaching the Included Sticker
This device comes with a“mode sticker”and an “application sticker.”
Apply these to the DD-7 as shown in the gure.
Mode Sticker: This allows you to check the function of each mode.
Application Sticker: This allows you to check the dierence in functions according to the input and output connections.
Application Sticker Mode
Sticker

19
English
Use of Battery
* A battery was installed in the unit before it left the factory. The life of this battery may be limited, however, since its primary purpose
was to enable testing.
* If operating this unit on batteries, please use alkaline batteries.
* If you handle batteries improperly, you risk explosion and uid leakage. Make sure that you carefully observe all of the items related
to batteries that are listed in“USING THE UNIT SAFELY” and“IMPORTANT NOTES”(supplied on a separate sheet).
* When operating on battery power only, the unit’s indicator will become dim when battery power gets too low. Replace the battery
as soon as possible.
* Batteries should always be installed or replaced before connecting any other devices. This way, you can prevent malfunction and
damage.

20
Changing the Battery
* The use of an AC adaptor is recommended as the unit’s power
consumption is relatively high. Should you prefer to use a
battery, please use the alkaline type.
Thumbscrew
Battery Housing
Pedal
Spring Base
Coil Spring
Guide Bush
Hole
Battery Snap
Cord
Battery Snap
9 V Battery
1. Hold down the pedal and loosen the thumbscrew,
then open the pedal upward.
* The pedal can be opened without detaching the thumbscrew
completely.
2. Remove the old battery from the battery housing,
and remove the snap cord connected to it.
3. Connect the snap cord to the new battery, and place
the battery inside the battery housing.
* Be sure to carefully observe the battery’s polarity (+ versus -).
4. Slip the coil spring onto the spring base on the back
of the pedal, and then close the pedal.
* Carefully avoid getting the snap cord caught in the pedal, coil
spring, and battery housing.
5. Finally, insert the thumbscrew into the guide bush
hole and fasten it securely.