december do i need to abuild an aliasing filter
No, an anti-aliasing filter is built into the converters.
I don't see anything critical in the patch. Can you try with a patch that only has
What is the cable that you are plugging into Bela connected to?
- If it comes from something that shares the same electric ground as Bela (e.g.: your computer, from which you are also powering the board), then you are going to have a nasty buzz because of a ground loop.
- If it comes from something that has a very high level (e.g.: a mixer output), then you could easily get clipping distortion for loud signals. You can fix this by reducing the gain of the Bela input (in the IDE settings, it's called 'pga gain left" and "pga gain right". It defaults to 10dB and has a range from 0 to 59.5dB).
- otherwise, did you check the cable itself/tried with a different one?