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General Device Commands
Get Name String - Gets the AM8/4's "name" string. The first data byte is the length of the name string, and the rest
of the data bytes are the device name.
Host sends command - 1 (1 hex)
Host receives 5 bytes: Byte 1 is the length of the name string (4 for the AM8/4), bytes 2, 3, 4, and 5 are the
ASCII values for "AM84" (65,77,56,52)
Set Device Address - Sets the AM8/4's device address and stores the new address in nonvolatile memory.
Host sends command - 2 (2 hex)
Host sends 1 byte: device address, valid range 128 to 254.
Get Firmware Version - Returns the version number of the AM8/4's current firmware. For example, Version 1.0
software would be returned as 10 (decimal).
Host sends command - 25 (19 hex)
Host receives 1 byte: firmware version.
Memory Preset Commands
Get Current Memory Preset - Gets the currently active AM8/4 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 AM8/4's current memory preset. The AM8/4 will immediately set all of its
programmable parameters to the new memory preset. The mode byte gives the option of memory recall with
or without affecting the current settings of rear panel gain.
Host sends command - 22 (16 hex)
Host sends 2 bytes:
Byte 1: New memory preset, 0 - 7 representing memory presets 1 - 8
Byte 2: Mode, 0 resets the rear panel gain to the programmed preset value, and 1 does not change the
current rear panel gain.
Input Related Commands
Get Input Gain - Gets the input gain associated with any one input or all 10 inputs. This gain value is the same one
you can manipulate from the Input Gain tab on the AM8/4 control panel.
Host sends command - 31 (1F hex)
Host sends 1 byte: input number to return, 0 - 9 returns the single gain value from inputs 1 - 10 while 10
(0A hex) returns 10 bytes representing the input gain of all inputs, starting with input 1.
Host receives 1 or 10 bytes: input gain(s), 0 - 79 (0-4F hex), where 0-78 represents +15dB to -63dB, and 79
(4F hex) is off. If the input gain value is greater than 127 (7F hex), this means the input is muted. The
unmuted gain may be derived by subtracting 128 (80 hex) 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 5 bytes:
Bytes 1-4: 10 bit mask, where each bit position represents one of the 10 inputs. For example, the lowest bit
of the mask represents input 1, the next lowest bit input 2, and so on. The 10 bit mask is broken into
4 bytes as follows:
22
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