Andrey Savitsky wrote:

Hello pd-list!

i'd like to construct an oscilliscope with spectrum analyzer.

Could you drop any idea how can i do this one.

Or by another words: how to detach any frequency from audio input?

Are there any special objects or abstractions?

rfft~ + friends ares surely your friends too. see doc/4.fft.examples

mfg.cds.asr IOhannes