Lectrosonics DSP4/4 DUAL Operating Instructions And Troubleshooting Manual page 28

Get Current Memory Preset - Gets the currently active DSP4/4 memory preset value.
Host sends command - 21 (15 hex)
Host receives 1 byte: current memory preset, 0 - 7 representing memory presets 1 - 8.
Set Current Memory Preset - Sets the DSP4/4's current memory preset. The DSP4/4 will immediately set all of its
programmable parameters to the new memory preset. The Mode data byte gives the option of memory
recall with or without affecting the current settings of the rear panel (i.e. programmable input controlled)
gains.
Host sends command - 22 (16 hex)
Host sends 2 byte:
Byte 1: New memory preset, 0 - 7 representing memory presets 1 - 8.
Byte 2: Mode, 0 resets the rear panel input and output gains to the programmed preset. 1 does not change
any of these gains.
Get Input Gain - Gets the input gain associated with any one input or all 4 inputs. This gain value is the same one
you can manipulate from the Input Gain tab on the DSP4/4 control panel.
Host sends command - 31 (1F hex)
Host sends 1 byte: input number to return, 0 - 3 returns the single gain value from inputs 1 - 4, while 4
returns 4 bytes representing the input gain of all inputs, starting with input 1.
Host receives 1 or 16 bytes: input gain(s), 0 - 79, where 0-78 represents +10dB to -68dB, and 79 is off. If
the input gain value is greater than 127, this means the input is muted. The unmuted gain may be derived by
subtracting 128 from the returned value.
Set Input Gain - Sets the input gain of 1 or more input channels.
Host sends command - 30 (1E hex)
Host sends 2 bytes:
Byte 1: A 4 bit mask, where each bit position represents one of the 4 inputs. For example, the lowest bit of
the mask represents input 1, the next lowest bit input 2, and so on. A "1" in a bit position will apply the gain
in byte 2 to the associated channel, while a "0" in a bit position will not apply the gain to the associated
channel.
Byte 2: Input gain value, 0 - 78, which represents +10dB to -68dB, 79 for off, 80 to increment the current gain
by 1dB, 81 to decrement the current gain by 1dB, 82 to mute the input, and 83 to unmute it to its pre-mute
gain value.
Get Output Gain - Gets the output gain associated with any one output or all 4 outputs. This gain value is the same
one you can manipulate from the Output Gain tab on the DSP4/4 control panel.
Host sends command - 61 (3D hex)
Host sends 1 byte: input number to return, 0 - 3 returns the single gain value from outputs 1 - 4, while 4
returns 4 bytes representing the output gain of all outputs, starting with output 1.
Host receives 1 or 12 bytes: input gain(s), 0 - 79, where 0-78 represents +10dB to -68dB, and 79 is off. If
the output gain value is greater than 127, this means the output is muted. The unmuted gain may be derived
by subtracting 128 from the returned value.
Set Output Gain - Sets the output gain of 1 or more input channels.
Host sends command - 60 (3C hex)
Host sends 2 bytes:
Byte 1: A 4 bit mask, where each bit position represents one of the 4 outputs. For example, the lowest bit of
the mask represents output 1, the next lowest bit output 2, and so on. A "1" in a bit position will apply the
gain in byte 2 to the associated channel, while a "0" in a bit position will not apply the gain to the associated
channel.
Byte 2: Input gain value, 0 - 78, which represents +10dB to -68dB, 79 for off, 80 to increment the current gain
by 1dB, 81 to decrement the current gain by 1dB, 82 to mute the input, and 83 to unmute it to its pre-mute
gain value.
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Memory Preset Commands
Input Related Commands
Output Related Commands