clipping / distortion on 100 volume and IQaudio DAC+

[jonas18z]

Anyone else has problem with clipping/ distortion on when volume is set to 100 with IQaudio DAC+?

around 95 is fine.

[KHatfull]

Try logging into the box via Putty/SSH and run alsamixer. See where the gain for the Pi-DAC+ is set, make sure it's not above 0db.

While you're there you could reduce the gain -3db from wherever it is which should solve your issue at 100% volume in RA.

However, I find that after a powercycle I have to reset the gain in alsamixer to where I want it, it doesn't seem to stick.

[jonas18z]

I attached a screenshot.

I don't understand:

Item: PCM [dB gain: 0.01]
And there is two value on the green/white bar 86 and 00



Is this bug under progress, I don't find it on github?

[ACX]

Please have a look at our future plans to improve that behaviour:
volume-control-linear-or-logarithmic-t254.html
and in particular at Gordon's post (IQaudIO's owner), where he explains the DAC's range:
volume-control-linear-or-logarithmic-t254.html#p2069

[jonas18z]

Thanks!