[PD] Mute certain partials (sigmund~)?

William Brent william.brent at gmail.com
Sat Mar 30 16:21:37 CET 2019

If you're open to other processing options, I made an extern a while back
that does FFT filtering relative to harmonic numbers. You feed it a signal
and the continuous MIDI pitch output from [sigmund~], and then based on
scalar values from a table you can boost/cut the amplitude of any given
harmonic by index. I haven't maintained it at all, but you can get the
source, help, and win/mac binaries here:


That should give you the effect you want if I'm understanding you right.
But if you specifically want to stick with analysis/resynthesis using
[sigmund~], I gave a shot at a solution that produces mute/play flags for
each [sigmund~] "track" by index. I did use [tabletool] from the timbreID
library for a nearest value search in a table, and batch freq/MIDI
conversion. But if you install timbreID you can try this out. I just did
the logic to produce the mute/play flags, so there's more work to do
sorting how to apply them.

I may fold something like this into the next version of my [sigmund~]
companion oscillator bank [martha~], so if I do I'll let you know!


On Fri, Mar 29, 2019 at 11:09 AM Peter P. <peterparker at fastmail.com> wrote:

> I am trying to mute every even partial of an integer series of partials
> from a harmonic oboe sound tracked with [sigmund~]. I find that this is
> non-trivial as it is hard to determine
> -the order of increasing frequencies (sigmund orders them by strength)
> -which partial is the lowest for a harmonic sound.
> Does anyone have a good idea how this can be done either in realtime or
> offline (via tables perhaps)?
> Thanks!
> P
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William Brent

“Great minds flock together”
Conflations: conversational idiom for the 21st century

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