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white noise can be heared when music is streamed from librespot or shairport

mayamathe

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Oct 10, 2022
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Hello,

I am using Moode on a Rpi to centralized my music sources (I used a kahdas tone 1 as Dac, a JLH classe A and enclosure with fostex speaker)

When I listen music from audio files (flac 16/24, MP3, AAC) the sound is good with no interference noise
But when I play music from Spotify (librespot) or airplay (shaireport) I can hear a constant white noise.

tThat white noise is not very loud but as I use volume control but the spotify/airplay (not the amplifier) when I put music at a low volume that white noise is very audible.
I could reproduce that on a other system using moode also but with an other DAC and classe D amplifier

Does someone experienced the same issue? and does someone could help me to find the root cause and fix that issue?

Regards

Max
 
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mayamathe

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Joined
Oct 10, 2022
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Hello,

Thanks for you reply. and indeed the noise stop when playback in paused.
And after checking I could found the issue: the dithering

For librespot I could disable that function in the config file and for shairport-sync I had to set the output format to "S32"

Regards

Maximilien
 
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