2011/3/17 Jaromír Mikeš <mira.mikes@gmail.com>

Hmmm ... it looks like good idea and Theremin patch as good starting point.

It is long time ago I played with MAX/MSP never with PD
Do you know some good object for HPF and LPF?

Is it possible to make standalone app from PD patch? MAX can do it if
I remember well.

Mira,

This is a good source for info on PD objects: http://en.flossmanuals.net/pure-data. In particular: http://en.flossmanuals.net/pure-data/ch082_audio-filters.

PD patches are not able to be made into standalone apps, at least not in any user-friendly manner. Also, the theremin patch linked to uses fiddle~, which I understand is slightly deprecated in favor of sigmind~. However, given that you seem to be only interested in onset information, and not pitch or sinusoidal partials as provided by these objects, it may be simpler to just use something similar to:

[hip~] or [lop~] > [bonk~] > [makenote]

-michael