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Katana Annoying Periodic Noise


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Hi Allo Support,


I have a Katana with Isolator and PI 3b+, with Volumio 2.8. I was initially using two standard switching power supplies but have recently bought a Shanti to replace them.


A few days ago, an annoying noise has appeared. Every few seconds (it’s very regular, every 7 or 8 seconds or so), I hear a “grriiitch” sound.


•    I can hear it from my listening position during quiet music passages, or in between tracks or when playback is paused.
•    This noise is present on both channels, at a constant level, unaffected by the volume setting.
•    I switched back to my original power supplies: it made no difference; noise is still there.
•    I have a second Output Stage board, so I swapped them: it made no difference, noise is still there.

 

Any idea what could cause this? Can this be fixed somehow?
Thanks!
P.
 

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1 hour ago, sadl01 said:

Hi Allo Support,


I have a Katana with Isolator and PI 3b+, with Volumio 2.8. I was initially using two standard switching power supplies but have recently bought a Shanti to replace them.


A few days ago, an annoying noise has appeared. Every few seconds (it’s very regular, every 7 or 8 seconds or so), I hear a “grriiitch” sound.


•    I can hear it from my listening position during quiet music passages, or in between tracks or when playback is paused.
•    This noise is present on both channels, at a constant level, unaffected by the volume setting.
•    I switched back to my original power supplies: it made no difference; noise is still there.
•    I have a second Output Stage board, so I swapped them: it made no difference, noise is still there.

 

Any idea what could cause this? Can this be fixed somehow?
Thanks!
P.
 

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