Hello. This is my first post to the mailing list, so I hope I have done this correctly.
> but it's sure very interesting to have an updated patch since going to 250 kHz, having better filtering can be a complicated task depending on which HW we try to emulate and how much CPU we want to dedicate to this part.
The change made in my pull request actually lowers the CPU usage. It is not trying to produce a more complicated hardware model that would require extra computation, but rather the opposite.
Summary:
- Fix the lowpass filters which have been broken since the move to 250 kHz. The audio output has essentially been unfiltered since that time.
- Provide a simplified lowpass filter model as a default, because I believe the two existing ones are flawed and not representative of the hardware sound they attempt to model.
-- Brad Smith