[PROBLEM] Initial stuttering when playing back high resolution files

[Tim Curtis]

The symptoms suggest something external to moOde software or RaspiOS since none of dev's can reproduce the issue using the supplied test files on either the exact same Audiophonics ES9038 DAC (I2S) as the OP, other I2S DAC's or USB DAC's.

If there were some sort of issue with audio glitches in the Linux kernel USB audio driver it would show up on our end in testing and attempts to reproduce the issue.

[DutchBassAddict]

The symptoms suggest something external to moOde software or RaspiOS since none of dev's can reproduce the issue using the supplied test files on either the exact same Audiophonics ES9038 DAC (I2S) as the OP, other I2S DAC's or USB DAC's.

If there were some sort of issue with audio glitches in the Linux kernel USB audio driver it would show up on our end in testing and attempts to reproduce the issue.

Interesting, I am not sure what conclusion to draw, as Volumio was working (though I am not sure if that was downsampling or not, so I will have to try that again) Might I ask if you experience any issues if you switch to DoP mode? If you weren't already using that? As soon as I switched to that mode the problem reoccurred. I am glad to see its working fine for others, though a bit disappointed my gear isn't!

[Tim Curtis]

The symptoms suggest something external to moOde software or RaspiOS since none of dev's can reproduce the issue using the supplied test files on either the exact same Audiophonics ES9038 DAC (I2S) as the OP, other I2S DAC's or USB DAC's.

If there were some sort of issue with audio glitches in the Linux kernel USB audio driver it would show up on our end in testing and attempts to reproduce the issue.

Interesting, I am not sure what conclusion to draw, as Volumio was working (though I am not sure if that was downsampling or not, so I will have to try that again) Might I ask if you experience any issues if you switch to DoP mode? If you weren't already using that? As soon as I switched to that mode the problem reoccurred. I am glad to see its working fine for others, though a bit disappointed my gear isn't!

I tested both MPD "Native DSD" option that falls back to to PCM on-the-fly conversion since the Audiophonics device does not support native DSD bitstream, and DSD over PCM (DoP) which the device does support and there were no audio glitches with either option for the supplied DSF test file.

[DutchBassAddict]

The symptoms suggest something external to moOde software or RaspiOS since none of dev's can reproduce the issue using the supplied test files on either the exact same Audiophonics ES9038 DAC (I2S) as the OP, other I2S DAC's or USB DAC's.

If there were some sort of issue with audio glitches in the Linux kernel USB audio driver it would show up on our end in testing and attempts to reproduce the issue.

Interesting, I am not sure what conclusion to draw, as Volumio was working (though I am not sure if that was downsampling or not, so I will have to try that again) Might I ask if you experience any issues if you switch to DoP mode? If you weren't already using that? As soon as I switched to that mode the problem reoccurred. I am glad to see its working fine for others, though a bit disappointed my gear isn't!

I tested both MPD "Native DSD" option that falls back to to PCM on-the-fly conversion since the Audiophonics device does not support native DSD bitstream, and DSD over PCM (DoP) which the device does support and there were no audio glitches with either option for the supplied DSF test file.

Thanks for testing - clearly something about my device is the issue as it works fine for you. The strange thing is that DoP seems to work fine with Volumio as the OS (confirmed with same tracks), which seems to indicate it may not be the hardware. I am possibly more confused than I was before now