Does anybody know of a function or patch out there for gating speech so that the vowels would be silenced ? By attempting to keep as much of the percussive elements of the speech in as possible. (or vice-versa would be cool too)

I've tried spectral gating and bands etc, but I wondered if there'd be something more contrast like to isolate percussive parts of speech

Any help would be massively welcome, or if anyone has the interest in a new patch I'd happily talk about putting a small thankyou payment their way

http://forum.pdpatchrepo.info/topic/9564/is-this-msp-patch-amplitude-gate-possible-in-pd-extended/4

Thanks @seed but this is the spectral gating I mention. Doesn't seem to advance the idea of gating the percussive phonemes of the speech? or is there something I'm missing?

Any ideas PD people?

you`re correct. posted for reference.
this topic is beyond me but more advanced people might weigh in.

a vocoder might make isolating the elements you are interested in easier.
rjlib has a patch called e_forcepitch-help.pd (also a_onset-help.pd)

or maybe look at synthesis / how to generate might give you ideas as to how to subtract.
https://github.com/proteusvacuum/KlattSynth
text-to-speech synthesis with libflite
moocow/flite

good luck

p.s.
http://forum.pdpatchrepo.info/topic/1844/sample-slicer-with-user-selectable-slices/14
there is a patch here called bonks_slices.pd
its not really what you want but maybe you could modify the idea to isolate words and then split a word into parts.

Farnell has a great section in his book, Designing Sound, on mammal sounds and human vowels.

Maybe you could look at his patch and use it as a starting point. You can find the patch here
but i really recommend buying the book to read that section, the whole books is really good.

That might help as a starting point though.