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If you need to adjust the Digital -> Analog audio, change:

usrpAudio = AUDIO_UNITY  ; AUDIO_UNITY, AUDIO_USE_GAIN, AUDIO_USE_AGC

usrpGain = 1.10                     ; AUDIO_USE_GAIN (0.0 to 5.0) (1.0 = AUDIO_UNITY)

usrpAGC = -20,10,100          ; Set the agc threshold (db), slope (db) and decay (ms)

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If you need to adjust the ASL -> DMR audio, change:

tlvAudio = AUDIO_UNITY     ; AUDIO_UNITY, AUDIO_USE_GAIN, AUDIO_BPF

tlvGain = 0.35                       ; Gain factor when tlvAudio = AUDIO_USE_GAIN (0.0 to 5.0) (1.0 = AUDIO_UNITY)