Audio Output too high - AllanGallop/DigiOne GitHub Wiki

It's appears that with some combinations of operating system, sound modules and radio's that even at the lowest possible settings the output audio sent to the transceiver is still too high.

Symptoms

The audio output drive causes high notfication of the ALC, despite all audio levels being set to lowest possible settings. In some cases the audio drive remains high (to the transceiver) but at lowest setting causes PTT jitter to occur due to low audio input to the VOX circuit.

Effected

Thanks to the protoype testers for their support trying out multiple combinations. The current combinations with a known issue are:

OS	Module	Radio	Interface
Windows 7	CM108	ICOM IC-728	ACC-2
Windows 10	CM108	ICOM IC-728	ACC-2

Fix

Currently the best option to resolve this is to replace R11 (4700Ω) with a higher value to compensate, values 10KΩ - 50KΩ have been found to work adequately