Audio Artifacts/Crackling Sound

[K1ESE]

On strong signals (which all of them seem to be in contests) the audio from the SP jack on the front of my client box makes crackling sounds in my headphones. 

I have set the server box setting for Radio>"Codec inp attenuation" to both NO and YES. The crackling is there with either setting.

I have set the client box setting for Radio>"Codec out gain" at 255 and 220.  At 220 the audio is lower, but I increase the radio volume to compensate.  The crackling is there with either setting.

Is there another setting that might impact the received audio?

73,
John K1ESE

[dj0qn]

Hi John,

Try the following:

Play around with these 3 until you are satisfied:
- increase rx jitter buffer to min 12+
- increase rx jitter delay to min 10+
- audio packet size 20 or 40

Other possibilities that may help:
- audio quality to 0 (half the bandwidth of codec 2 and more than adequate for SSB & CW)
- set RTP to continuous

73,
Mitch DJ0QN / K7DX