What sample rate and bit depth does the DSP operate at?

[Matt_Holland]

@WiiM Team @WiiM Support

As per the thread title, could the Wiim team confirm what resolution the DSP in the Ultra performs operations such as digital volume attenuation and EQ? Thank you.

 

[Burnside]

Does this help with part of your query?

P

Thread 'Quality basics: please improve digital volume control'

Mar 12, 2024

Dear WiiM-Team,

can you improve the quality of the digital volume control implementation? (Do you use e.g 64bit/dithering algorithms?)

The current algorithm seems to be detrimental to sound quality, apart from the numerical bit-reduction. This general improvement would be a gain for all WiiM devices and in the future.

Some users will not recognise, but many (current) users ask for 1:1 bit-perfect, which means that they are not satisfied with the current implementation. This user group may appreciate the WiiM technical quality level.

Perhaps it is possible to add a ISO226 adapted volume...

• planetti
• Replies: 21
• Forum: Feature Requests for WiiM Pro & Pro Plus

• 

 

[hgo58]

Does this help,with kart of your query?

P

Thread 'Quality basics: please improve digital volume control'

Mar 12, 2024

Dear WiiM-Team,

can you improve the quality of the digital volume control implementation? (Do you use e.g 64bit/dithering algorithms?)

The current algorithm seems to be detrimental to sound quality, apart from the numerical bit-reduction. This general improvement would be a gain for all WiiM devices and in the future.

Some users will not recognise, but many (current) users ask for 1:1 bit-perfect, which means that they are not satisfied with the current implementation. This user group may appreciate the WiiM technical quality level.

Perhaps it is possible to add a ISO226 adapted volume...

• planetti
• Replies: 21
• Forum: Feature Requests for WiiM Pro & Pro Plus

• 

"Our DAC supports 32-bit input, which we utilize to maintain bit depth. Additionally, intermediate processing is designed to preserve sample value accuracy throughout."

So following the input sample rate and using 32 bit for volume control.

 

[Burnside]

Post in thread 'Quality basics: please improve digital volume control':

“Thank you for your suggestion regarding digital volume control. Our volume table is 8-bit, and considering the maximum bit-depth is 24-bit, we employ 32-bit processing for volume control to avoid any loss in precision.”

https://forum.wiimhome.com/threads/...mprove-digital-volume-control.3063/post-47075

 

[Matt_Holland]

@Burnside @hgo58
Thank you both. Perfectly answers my query.