Studiomaster AC36II User manual

Thank you for purchasing our products.
Please read the owner’ s manual thoroughly prior to using the system.
Please keep the manual for future reference.
OWNER’SMANUAL
Digital Audio Processor
AC36II/AC48II

INDEX
FUNCTIONS ------------------------------------------------------------------------------ 1
FRONT PANEL ---------------------------------------------------------------------------- 1
REAR PANEL ------------------------------------------------------------------------------ 2
OPERATION GUIDANCE ---------------------------------------------------------------- 2
PC SOFTWARE ONLINE SPECIFICATION ------------------- ----------------------- 5
PC SOFTWARE INTERFACE SPECIFICATIONS ----------------------------------- 6
SPECIFICATIONS ------------------------------------------------------------------------ 11
ACCESSORIES --------------------------------------------------------------------------- 11
REAR PANEL CONTROL PORT CONNECTION ------------------------------------ 12
EXTEND REMOTE CONTROL PROTOCOL CONNECTION----------------------- 13
SAFETY INSTRUCTIONS --------------------------------------------------------------- 16
Digital Audio Processor

FRONT PANEL
FUNCTIONS
Input Level Indicators
5-segment high precision LED show the situation of current input channel's level.
Input Edit Keys
Press to enter into relevant channel, parameters will show on the edit key and LCD.
Input Mute Keys
Mute channel by pressing and exit by pressing again.
Parameter edit keys
Choose all the system menu/input parameter/output parameter, exit by pressing ”exit” key.
LCD
Show all the related operation parameter and status of current operation.
Parameter Edit Knob
Edit the whole menu and parameter setting confirm by press.
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4
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Digital Audio Processor
● 32-bit DSP SHARC process, 96kHz sampling rate, 24-bit AD/DA convert.
● Input processing includes High-cut, Low-cut, 5 PEQ, Noise gate, Gain, Mute, Phase, Delay, Link and
so on.
● Output processing includes crossover, 7 PEQ, Gain, Mute, Compressor/ Limiter, Phase, Delay, Link
and so on.
● Adjustable PEQ frequency, Gain and bandwidth; we can choose style: PEAK, H-SHELF, L-SHELF,
Low cut, High cut。
● Every input and output can do matrix assign flexibly, and all the input and output channel name can be
changed.
● The style of all High-cut ,Low-cut filter and Distributor unit: Butterworth, Linkwitz-Riley, Bessel; slope
is from -6dB/Oct to -48dB/Oct.
● Adjustable compressor/limiter threshold, ratio, attached time and release time.
● All delay module's delay time can reach over 680ms.
● Pre settings can copy for every single channel, every channel can do link adjust.
● Inside single generator(pink, white noise and 20-20K sine wave, amplitude adjustable).
● Front panel has level indicator for input/output, USB pot, RS232, 485 control at rear panel. One-key
online made the operation more convenient.
● 30 user preset, device parameter and single preset file can save and recall separately. Maximal 250
units can be link together via ID settings. Password protection function for high level applications.
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4
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356 8 10

Output Level Indicators
4-segment high precision LED and1 compressor signal LED shows the status of output level and
compressor on current channel.
Output Mute Keys
Mute channel by pressing and exit by pressing again.
Output Edit Keys
Press to enter into relevant channel edit status parameter will show on the edit, Key and LCD.
USB
Used to connect with PC and center-control equipment, remote control.
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REAR PANEL
21 345
Power Socket
The voltage is 95V-240V.
Power on/off Switch
RS232/485 interface
Center-control by RS232, cascade control by RS485.
Output interface
Male XLR balanced output 1-8.
Signal input interface
Female XLR balanced input A-D.
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5
2
OPERATION GUIDANCE
Below status after power on:
Power on, show brand, model and version.
After self-check, show brand, model and current user preset.
ID Number Select
ID: 1
Press UTIL key, enter below setting status
Press UTIL key one time, enter ID number setting: the ID number of the units,
should be different when cas cade connection, the setting scale is1-254. (If
cas cade connection units are over 16 or long distance, a loaded 120 ohms
resistance should be parallel connected by RS 485.
Unit unlock
Password 1234
Press DOWN key one time, enter password setting: users can choose all the
words or numbers to set the password they want, the initial password is
“1234”.
Digital Audio Processor
Studiomaster
AC48II V1.0
AC48II
F00 Default Preset

3
In Source Select
ANALOG INPUT
Copy CH select
InA InB
LCD DISPLAY TIME
10 Second
Load preset
F00 Default Preset
Store preset
U01 Default Preset
Press DOWN key two times, enter password memory setting way. OFF
mains that password does not memory. It can operate the panel follow-up
afterunlocking the passesword at first time. ON mains that password memory.
It always needs to unlock the password when open the unit every time.
Press DOWN key three times, enter signal source selection: pink noise, white
noise and sine wave 20Hz-20kHz.
Press DOWN key four times, enter copy channel selection: input or output
channel can copy freely.
Press DOWN key five times, enter delay unit setting: ms, m, ft can be chosen.
Press RECALL/SAVE key, enter below setting status
Press RECALL key, enter preset transfer. Users can transfer the saved
Settings U01-U30 and the initial setting F00.
Press SAVE key, enter preset save. Users can save the adjust status in
U01-U30. Attention that the F00 factory preset can’t save.
Press INPUT EDIT enter the settings as follows
Default preferred option is gain the scale is -60dB-+12dB.
Press DOWN key one time enter PEQ parameter setting PEQ current filter
number Is 8 ,the scale of “F” is 20Hz-20kHz, “Q” is 0.4-128, "G" is -12dB
- +12dB, the style of filter are Peak, Low-shelf, High-shelf, Low-cut, High-cut,
Allpass1, Allpass2, Bypass(ON/OFF).
LOCK Select
OFF
PEQ:1 INA
G: 0.0 FREQ: 50.7 BY
Q: 3.00 TYPE: PEAK □
Press DOWN key five times, enter linking adjustment selection: If the
current channel is INA, you can choose INB, INC, IND channel to adjust
parameter simultaneously, together.
Press DOWN key three times, enter delay parameter setting: the scale is
0-680mS, 0-234m, 0-769ft.
PHASE INA
0: □ 180: □
Press DOWN key four times, enter phasic adjust setting, adjustment scale is
(0/180).
Press DOWN key two times enter low-high pass parameter setting, the scale
of the “HP” is 20Hz -20kHz, “LP” is 20Hz -20kHz, 3 different slanting rate for
low/ high pass filter Butterworth, Bessel, Linkwitz-Riley, Slanting rate is
-6dB--48dB.
HI & LOW - PASS INA
HP: 19.6 BYPASS
LP: 20K15 BYPASS
DELAY INA
0.000ms
0.000m 0.000ft
√
IN-LINK INA
A: □ B: □ C: □ D: □
√
GAIN INA
-60.0dB
GAIN OUT1
+0.0dB
Default preferred option is gain, the scale is- 60dB--12dB.
Press OUTPUT EDIT enter the settings as follow
Digital Audio Processor

4
:
Press DOWN key one time, enter PEQ PARAMETER SETTING: ”PEQ” current
number is 9, the scale of “F” is 20Hz-20kHz, “Q” is 0.4-128 “G” is -12dB
- +12dB, the style of filter are Peak, Low-shelf, High-shelf, High-cut, Low-cut,
Allpass1, Allpass2, Bypass(ON/OFF).
DELAY OUT1
0.000ms
0.000m 0.000ft
Press DOWN key four times,enter delay parameter setting: the scale is 0-680
mS, 0-234m, 0-769ft .
Press DOWN key two times, enter low-high pass parameter setting: the scale
of “HP” is
20Hz-20kHz, “LP” is 20Hz- 20kHz, 3 different slanting rate for low/high pass
filter: Butterworth, Bessel, Linkwitz-Riley, Slanting rate is -6dB--48dB.
Press DOWN key three times, enter matrix setting, all the output channel can
choose one
or several input signal freely.
Press DOWN key five times, enter phase parameter setting: the scale is
°0/180°.
Press DOWN key six times, enter compressor setting: the scale of threshold is -60dB
~+20dB, startup time is 1-999ms,attached time is 10-3000ms, ratio is 1:1, 1:10-LIMIT..
Press DOWN key seven times, enter linking adjustment: select the
corresponding channel can adjust the parameters.
COMPRESSOR OUT1
TH:+20.0 RAT:1.0
AT: 50ms REL: 500ms
MATRIX OUT1
A: □ B: □ C: □ D: □
√
PEQ: 1 OUT1
G:0.0 FREQ:40.2 BY
Q:3.00 YPTE: PEAK □
HI&LOW-PASS OUT1
HP: 19.6 BYPASS
LP: 20K15 BYPASS
PHASE OUT1
0: □ 180: □
√
OUTLINK OUT1
1: □ 2: □ 3: □ 4: □
5: □ 6: □ 7: □ 8: □
√
Digital Audio Processor

USB connection steps
USB connection
USB cord
1, Click the PC software on the CD, press next step to continue according to the instruction until
Finish setup, then exit.
Notice: User manual, PC software are on the attached CD, due to the software upgrades time by time,
Please do control your DSP processor ONLY by this CD!
DSP Processor
PC or Laptop
PC SOFTWARE ONLINE SPECIFICATION
5
2, Connect the processor to the computer by USB, after turning on the device, the computer will
searching new hardware automatically, during setup new hardware there will show the.
Warnings: hardware setup success and can be used.
Digital Audio Processor

3, Open PC controlling software, PC software will find USB and connect device, after that the on-Line
key change into green at the top right corner and show “Online” , you can operate the Processor by
controlling software, Click “Online” button before exit.
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THE FIRST: VOLUME CONTROL INTERFACE
PC SOFTWARE INTERFACE SPECIFICATIONS
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Digital Audio Processor

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1, Menu
File Open and save preset parameter, the whole date upload to the computer
and download to the device.
Link
Copy
Lock
Setting ID
Test Tone
Channel Name
Language Chinese and English menu is switchable.
Help RS232 control protocol codes for reference.
The whole channel name are revisable.
Input and output channels can be set freely to adjust all of the parameters.
Parameter copy freely between the input and Output channels.
Setting password of the panel to ensure the safety of the device.
To cascade control more than 255 device by setting different ID.
Buid-in signal generator, outputting pink noise, white noise and sine wave.
2, Spectrum Area:
You can choose PEQ and phase freely which show the input andoutput channels.
3, The Volume Control Area:
Gain, Phase, Mute control for all input & output channels.
4, Preset Operation Area:
Save or convert preset parameter and show current preset parameter status.
THE SECOND: COMPRESSOR INTERFACE
1
2
1, Show compression status, level indicators and impression status of all channels.
2, Set the whole compression parameters for output channel, the compression range is -60dB–
+20dB, rate is 1:1, 1:10, LIMIT, start time is: 0-200ms, recovery time is 0-999ms.
Digital Audio Processor

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THE THIRD: DELAY INTERFACE
1, Show the delay parameter status of all channels.
2, Can adjust delay parameter of all channels, the scale is 0-680ms, there are millisecond, meter and
feet units for converting.
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2
THE FOURTH: MATRIX INTERFACE
1
2
1, Show connections of the device, users can enter and edit relevant channel by clicking the square ,
every channel name is revisable.
2, All output channels can choose any input channels.
Digital Audio Processor

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THE FIFTH: INPUT INTERFACE
1, Display the current channel PEQ curve graph, can change each PEQ point frequency and gain
through the mouse, and also can change the high/low cut frequency point.
2, Adjustable Gain, Mute, Q , Frequency, Type of all PEQ, Bypass key is optional, we can choose
PEQ style: Balance, High-shelf, Low-shelf, High-cut, Low-cu.
3, The Gain, Q, Frequency of PEQ can be adjusted by putter, and can be controlled by pressing the
UP, DOWN, LEFT, RIGHT key on the keyboard.
4, Low-cut frequency 20HZ-20KHZ is adjustable, you can choose slope rate: Butterworth, Bessel,
Linkwitz-Riley, the scale is: -6dB-- -48dB.
5, High-cut frequency 20HZ-20KHZ is adjustable, you can choose slope rate : Butterworth, Bessel,
Linkwitz-Riley, the scale is: -6dB-- -48dB.
6, The Gain, Mute, Phase of the input channel can control separately, as same as the level display
Light.
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356
Digital Audio Processor

10
THE SIXTH: OUTPUT INTERFACE
1, Display the current channel PEQ curve graph, can change each PEQ point frequency and gain
through the mouse, and also can change the high/low cut frequency point.
2, Adjustable Gain, Mute, Q , Frequency, Type of all PEQ, Bypass key is optional, we can choose PEQ
style: Balance, High-shelf, Low-shelf, High-cut, Low-cut.
3, The Gain, Q, Frequency of PEQ can be adjusted by putter, and can be controlled by pressing the
UP, DOWN, LEFT, RIGHT key on the keyboard.
4, Low-cut frequency 20HZ-20KHZ is adjustable, you can choose slope rate: Butterworth, Bessel,
Linkwitz-Riley, the scale is:-6dB-- -48dB
5, High-cut frequency 20HZ-20KHZ is adjustable, you can choose slope rate : Butterworth, Bessel,
Linkwitz-Riley, the scale is:-6dB-- -48dB.
6, The Gain, Mute, Phase of the output channel can control separately, as same as the level display
light.
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4
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Digital Audio Processor

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System Specification
Input Section
Output Section
Digital Processing
Display
Power Supply
Dimension
Weight
Frequency Response 20Hz~20kHz, +/-0.3dBu
Dynamic Range
>110 dBu
Distortion(THD)≤0. 01% at 1kHz(0dBu)
Cross-talk
2.3kg
48.2x20.5x4.4CM
32 bit DSP, 96kHz Sampling Rates
24-bit sigma - delta A/D, D/A convert
Impedance
(LxWxH)
Type
Impedance
Max. Input Level
Type
>70dBu 20Hz~20kHz
Balanced XLR
+15dBu
Balanced XLR
+15dBu
Dot matrix screen display current Parameters and all Setting
1, CD (Include PC software and user's manual).
2, One USB cord.
3, One electrical cord.
SPECIFICATION
ACCESSORIES
Max. Output Level
AC~95V-250V 50/60Hz
C.M.R.R >75dBu 1kHz
Digital Audio Processor
≥8kΩ
≤50Ω

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REAR PANEL CONTROL PORT CONNECTION
1, RS232 connection port: Central control and connect to PC through RS232 port.
RS232/USB
CONVERTER
PC or laptop
The 2PIN is: TXD, 3PIN
is:RXD, 5PIN is: GND
(1), Connect several devices by cascading 7PIN and 8PIN
of the RS232 port, connect the computer through
(2), RS485 converted RS232 switch, Cascade controllable
several devices after setting the different ID.
2, RS485 cascade contro port: Parallel connect several devices by RS485, you can choose different
ID to cascade control separately.
PC or laptop
The 7PIN is: RS485 D+ , 8PIN is: RS485 D- of the
RS232 port.
ID:1
ID:2
ID:3
Digital Audio Processor

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1, Control package Format
2, Command Detail
(1) Gain Control(0x41)
Example (increase input channel 1 gain): 7B7D01410000007D7B
(2) Mute Control(0x42)
Example (input channel 1 mute): 7B7D01420000017D7B
(3)Load Preset Control(0x43)
Example (recall user preset U00):7B7D01430100007D7B
EXTEND REMOTE CONTROL PROTOCOL
01 2 345678
DLE STX Device
Assress
CMD Data1 Data2 Date3
Packet 0x7B 0x7D 1～254 0x41～0x4A 0x? ? 0x7D0x? ? 0x? ? 0x7B
STX DLE
01 2 345678
DLE STX Device
Assress
CMD
Packet 0x7B 0x7D 1～254 0x7D 0x7B
STX DLE
0x41 In:0 Out:10～3+:0,-:1
Channel +/-
In/Out
01 2 345678
DLE STX Device
Assress
CMD
Packet 0x7B 0x7D 1～254 0x7D 0x7B
STX DLE
0x42 In:0 Out:10～3No:0 Yes:1
Channel No/Yes
In/Out
Packet
01 2 345678
DLE STX Device
Assress
CMD
0x7B 0x7D 1～254 0x7D 0x7B
STX DLE
0x43 F:0 U:10～31 0
Preset
0x30
Factory/User
Digital Audio Processor

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Example (read input channel 1 gain parameter):7B7D01480000007D7B
MCU Return:0x00～0x90=-60dB～+12dB,0.5dB/Step
(7)Get Now Mute(0x49)
Example (read input channel 1 mute parameter):7B7D01490000007D7B
MCU Return:0x00 or 0x01=Un-Mute or Mute
(6)Get Now Gain(0x48)
(4)Input Volume Control(0x44)
Example(InA volume +0.0dB):7B7D01440001187D7B
(5)Output Volume Control(0x45)
Example（Out2 volume -3.0dB):7B7D01450100FA7D7B
Packet
01 2 345678
DLE STX Device
Assress
CMD
0x7B 0x7D 1～254 0x7D 0x7B
STX DLE
0x49 In:0 Out:10～30
Channel
0x30
In/Out
Packet
01 2 345678
DLE STX Device
Assress
CMD
0x7B 0x7D 1～254 0x7D 0x7B
STX DLE
0x48 In:0 Out:10～30
Channel
0x30
In/Out
Packet
01 2 34
DLE STX Device
Assress
CMD
0x7B 0x7D 1～254 0x44 0x?? 00～07
HI-VOL
Channel
5678
0x7D 0x7B
STX DLE
0x??
LO-VOL
Packet
01 2 34
DLE STX Device
Assress
CMD
0x7B 0x7D 1～254 0x45 0x?? 0x?? 00～07
HI-VOL
Channel
5678
0x7D 0x7B
STX DLE
LO-VOL
Digital Audio Processor

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(8) Get Now Preset(0x4A)
Example (read preset parameter):7B7D014A0000007D7B
MCU Return:0x00～0x32=0:F00,1～32:U00～U31
Packet
01 2 345678
DLE STX Device
Assress
CMD
0x7B 0x7D 1～254 0x7D 0x7B
STX DLE
0x4A 0 0
0x30 0x30 0x30
0
Communication
parameter
Bits per second
Data bits
Parity
115200
8
None
Stop bits
Step
ID
1
>=20ms
1
Digital Audio Processor

16
Digital Audio Processor
SAFETY INSTRUCTION
PLEASE READ THESE SAFETY MATTERS CAREFULLY BEFORE USE：
• This product must make sure connect to the ground correctly. If it has broken down, to avoid any electric
shock, the device power cord and plug both equipped safety ground connection. The power cord should
according to the requirement to install and ground connection.
Warning: Incorrect ground connection might be caused electric shock happen!
If you have any inquiry about the ground connection, please let qualified people checking it or fix it，do
not change it by yourself. If the power plug is unsuitable, you can entrust electrician or professional staff to
install the suitable power plug.
• To avoid the risk of injury, please close supervision when using the product near child.
• Please do not use the device at wet place, such as: near bathtub, washbasin, kitchen sink, wet basement
or near swimming pool and lake.
• It should not be placed near the device which filled with liquids such as the vase.
• This product should install at draughty place or dry environment.
• The power source type must be match to the operation instruction or the volts type which on the product.
• The product must keep away from heat source, such as: electric heater, electric blanket or other heat
source products.
• The product equipped one power cord that complied with safety certification. If you can't insert the power
cord into the plug, please contact electrician or professional staff to change the old plug. Attention that
should not break the power plug safety device.
• If the product not for operation for a long time. Please pull out the power cord from power plug. Don't drag
the power cord
• This product use coupler as a make and break device, should be maintained convenient operation
• Please don't operate the product when following things opened, should call qualified people checking it
or fix it:
A. Power cord damaged.
B. Objects or liquid get into the product.
C. The product is sopping with rain.
D. The product can not operate correctly or show obvious unusual.
E. The product dropped down, damaged.
• Any inquiries about the product which not mentioned in the user manuals, please contact the eligible
electrician or professional staff to repair.
● Only apply to security use which area below altitude of 2000m.
● Only apply to security use which condition except tropical climate.
Pay attention to the dangerous voltage of the
insulation within the products. It may be
considerable damage to human body.
Important Notices and Operation Instructions.
WARNING:
Please do not let the heavy extrusion or stamp on the power cord, avoid by all pull or distort the power cord.
To avoid the risk of fire or electric shock, please do not use unqualified power cord.
CAUTION
To avoid the electric shock,
should not open it
Caution: to avoid electric shock, please don’t
remove the bottom. If it has any problems
should not repair it by yourself, please entrust
professional staff to repair it.