Tweaking the audio performance Rpi3

[pietpara]

BTW I just noticed during boot that I get 3 failed messages:

Failed to open vchi service
Failed to initialize shared memory services
Failed to start Load Kernel Modules

I guess that should not happen, right?

But, apart from playback with gaps between tracks and a pop, all works well.

Hmmm.
Is that something very obvious for the experts here?

Pietpara

[Frost_dk]

[pietpara]

Thank you for the tip, but it did not help.
I thought it might be the format 192000:24:2 that I set, so I changed it to 192000:16:2, but also no help.

That raises a question about the format too. Does setting 16 or 24 (assuming those are bit depth of the sound signal) depend on or affected somehow by what the source stream is?

Cheers
Pietpara

[pietpara]

[Discovery]

pietpara,

Did you start with a nightly build...?

[pietpara]

[hondagx35]

[pietpara]

[hondagx35]

Hi all,

I have no answer to all your questions belonging to SOXR and other sample rate converters.

But I have my own point of view:
It's really silly (bad idea) to modify the audio source instead of passing it untouched to your device unless you have some shitty sound card that doesn't handle the correct sample rate. It is arguable that padding the signal to 32bit is good, or at least harmless.

If you like to play highres audio I would recommend buying a DAC that can handle this natively.

Maybe someone can explain me (electronic engineer) why I should do sample rate conversion.

Frank

[pietpara]

Hello Frank,

I totally agree with you. But I was under the impression that the ES9018K2M DAC in the RaspTouch also uses it's internal upsampling and by using the SOXR one, which is considered a very good one, you can kind of by-pass that one, because the ESS need not upsample anymore.

Here's a bit of backround:

So, it seems that due to the way modern DACs work, with Delta-Sigma converters, upsampling is a must and almost standard in any DAC chip.



Anyhow, my questions are more towards the popping sound when switching tracks in RuneAudio. This is independent of the settings of RuneAudio. No matter what audio profile or config.txt or cdmline.txt, I always have a 'pop' when I manually change tracks. And I do not hear a pop when just playing the queue (playlist).
Now, when I turn on the SOXR upsampler, then I even get a gap and a pop between tracks when playing a playlist.

I would really like to solve this, since the pop is so nasty that I feel my tweeters don't like it either.

Doesn't anyone else have this issue?

Best,
Pietpara