While playing with the fft function over in nudel for the last few month, I've noticed that the defaults currently (fft(1,8)) don't make much sense in most cases.

I almost always change them to fft(0,1), so I think these are better values.

Sadly this change is technically compatability breaking with current flok-rooms.
I think that is fine as the impact is small-ish.

In general 0,1 has a bit bigger amplitudes, but it also incorporates all of the frequency spectrum (and not only an eights).

Changes:

• change defaults of fft function:
  • index is now 0
  • buckets is now 1
• the third parameters can now also just be a string, setting the analyzer id directly.
  • this is the most used other option, and it was noisy to set it with the object each time