Hi.
I have this idea for a special sound effect:
A monophonic input sound data is processed in such way that all the
frequencies above the 'base' frequency are stripped ( by base frequency
I mean the dominant frequency, I hope this is the right term ). The base
frequency changes in time, so the filter has to apply different
parameters as time progresses ( e.g.. each note gets a different
low-pass filter ). The filter will be so 'aggressive' that none or very
little of the higher frequencies will remain. The result would retain
the pitch and volume information of the original file but with a much
simpler sound, almost an oscillator sound. Those this effect can turn a
vocal or flute etc. recording into a 'synth sound' recording, in a much
more efficient way then current audio to pitch/midi convertors such as
AutoScore, and Sound2Midi.
It's even possible to ADD frequencies to the resulting simple sound, so
to make it complex again but with a completely different sound then the
original.

Well, first I'd like to know if such or similar devices exist.
And if CSound would be the best approch to implement it.
I'm very new to CSound, so I'd appreciate any help.

Thanx!

Oded.

oded@appstream.com