WiiM Ultra optical output with volume control

[pieterv1]

I've done some searching and might have seen this question answered in the past, but just a quick double-check:

How is variable volume control handled by the WiiM Ultra (and probably WiiM Pro/Mini as well), when using the optical output?

Is it a 24 bit output to utilise the max resolution possible over a toslink/coax connection? This to reduce any possible degradation/maintain dynamic range at lower volumes (I know it'll be hardly noticeable)

 

[hgo58]

I've done some searching and might have seen this question answered in the past, but just a quick double-check:

How is variable volume control handled by the WiiM Ultra (and probably WiiM Pro/Mini as well), when using the optical output?

Is it a 24 bit output to utilise the max resolution possible over a toslink/coax connection? This to reduce any possible degradation/maintain dynamic range at lower volumes (I know it'll be hardly noticeable)

Volume control and other DSP is done with 32 bit. This is output on digital outputs depending on the configured values.

 

[pieterv1]

Volume control and other DSP is done with 32 bit. This is output on digital outputs depending on the configured values.

View attachment 34745

Ah I see there's the "fixed resolution" toggle so I could technically force it to always stick to 24-bit?

And sample rate will still be adaptive?

 

[hgo58]

And sample rate will still be adaptive?

No, fix resolution is fixed sample rate and fixed bit rate. Unless you need it to be fixed, leave it variable.