Ultra DAC settings

[bernard23]

I couldn't find this is a search, which was surprising.
Can anyone explain the differences between the DAC filter settings, as in how they work. Not interested in any subjective opinions, just what they're trying to achieve. I've never been able to reliably distinguish different dac filters on other devices and don't expect to here necessarily, but there's so many!!

 

[mlsstl]

These filters affect the way the DAC handles signals above the top frequency the sample rate can handle (e.g., 22,500 Hz for the 44.1K sampling rate of a CD.) The choice of filters affects how the DAC rolls off as it approaches that top frequency. It also affects how impulse signals are handled and how much "ringing" is present.

Here's an interesting article I found: https://addictedtoaudio.com.au/blogs/how-to/how-to-pick-the-best-filter-setting-for-your-dac

Personally I've never heard much of an identifiable difference between the filters, but then I'm in my 70s and don't hear high frequencies as well as someone younger might. The best suggestion I have is to find some material with significant high frequency energy (cymbals, etc.) and try each of the filters and see which one you prefer. Like many subjective perceptions in audio, there are a lot of different opinions.

 

[Burnside]

The first result in searching for “filter” in the forum gave me this:

Dac Digital Filter Type

I didn't understand at all the Dac Digital Filter Type Sharp Roll, Slow Roll, Short, Low dispersion, etc. What they mean? Thank you

forum.wiimhome.com

Other results include:

Post in thread 'DAC Filters switching no difference in Pro Plus'
https://forum.wiimhome.com/threads/dac-filters-switching-no-difference-in-pro-plus.2056/post-31305

Post in thread 'DAC Filters switching no difference in Pro Plus'
https://forum.wiimhome.com/threads/dac-filters-switching-no-difference-in-pro-plus.2056/post-41238

Plus there’s WiiM’s own faq re the filters in the Pro Plus:

Understanding the Six DAC Digital Filter Types of AKM 4493SEQ DAC on WiiM Pro Plus

The WiiM Pro Plus is equipped with the latest generation AKM 4493SEQ premium DAC, renowned for its exceptionally low distortion and wide dynamic range, a result of AKM’s advanced Velvet Sound Technology. This DAC supports high-resolution audio so...

faq.wiimhome.com

 

[bernard23]

These filters affect the way the DAC handles signals above the top frequency the sample rate can handle (e.g., 22,500 Hz for the 44.1K sampling rate of a CD.) The choice of filters affects how the DAC rolls off as it approaches that top frequency. It also affects how impulse signals are handled and how much "ringing" is present.

Here's an interesting article I found: https://addictedtoaudio.com.au/blogs/how-to/how-to-pick-the-best-filter-setting-for-your-dac

Personally I've never heard much of an identifiable difference between the filters, but then I'm in my 70s and don't hear high frequencies as well as someone younger might. The best suggestion I have is to find some material with significant high frequency energy (cymbals, etc.) and try each of the filters and see which one you prefer. Like many subjective perceptions in audio, there are a lot of different opinions.

Thanks for sharing this link, it's really useful!

 

[bernard23]

The first result in searching for “filter” in the forum gave me this:

Dac Digital Filter Type

I didn't understand at all the Dac Digital Filter Type Sharp Roll, Slow Roll, Short, Low dispersion, etc. What they mean? Thank you

forum.wiimhome.com

Other results include:

Post in thread 'DAC Filters switching no difference in Pro Plus'
https://forum.wiimhome.com/threads/dac-filters-switching-no-difference-in-pro-plus.2056/post-31305

Post in thread 'DAC Filters switching no difference in Pro Plus'
https://forum.wiimhome.com/threads/dac-filters-switching-no-difference-in-pro-plus.2056/post-41238

Plus there’s WiiM’s own faq re the filters in the Pro Plus:

Understanding the Six DAC Digital Filter Types of AKM 4493SEQ DAC on WiiM Pro Plus

The WiiM Pro Plus is equipped with the latest generation AKM 4493SEQ premium DAC, renowned for its exceptionally low distortion and wide dynamic range, a result of AKM’s advanced Velvet Sound Technology. This DAC supports high-resolution audio so...

faq.wiimhome.com

Thanks. Bizarre that it didn't work so obviously when I tried it though using a mobile device. Anyway, thank you.

Edit: some of that info though relates to the pro plus, I'm using the Ultra. Different chip and has additional filters. This is the one that's intriguing me