Low input audio, states audio is coming from a audio matrix, using the 3.5 audio input

-Audio on the 3.5mm audio jack is very low level.
-Issues on G7500 codecs.
-User is replacing GS700/500 codecs and was working correctly on them.
-Audio is coming from a mixer and line level.
-3.5 jack cranked all the way to 10 and still audio issues, meters not moving.
-Audio set to playback to far site, echo cancled.
-User had a video in the room playing very loud, and the meters on the codec were not moving at all

Check on the logs the audio.in "threepointfive" parameter. If it have a non-zero value, the issue is on the (physical) gain.:   audio.in[12].level="10" audio.in[12].name="threepointfive" audio.in[12].threepointfivefullfunction="Playback to Far Sites, Mute Controlled, Echo Cancelled" 2021-01-26 16:04:33.248 DEBUG    logcat: ConfigServerResource(5483): (webapp) Config read requested for: [audio.in.name, audio.in.level, audio.in.ismicinput, audio.in.contentportsassociation, audio.in.stereomode, audio.in.enablestereoautorotation, audio.in.enableechocancellation, audio.in.threepointfivecontentfunction, audio.in.threepointfivefullfunction] Session: PSKCluq765fy G7500 is not an exact replacement for Group 500, they have important differences, specially talking about hardware.