RE: 2 modules ideas

[Fraser, Colin J]

-----Original Message----- 
From: jbv 
Sent: Thu 10/08/2000 19:53 
To: Synth-DIY 
Cc: 
Subject: 2 modules ideas



2) formant synthesis 

the CEM3350 is a double VC BP filter with 
VC bandwidth and VC resonnance... 

The idea is to put several of those in parallel 
and perform some formant synthesis by 
controlling all CVs from a uC. 

AFAIK, 7 to 8 formants are sufficiant for 
acceptable speech synthesis. Therefore, putting 
4 CEM3350 in parallel could allow some 
speech / singing synthesis with white noise 
or any VCO output... 

I've been thinking about that one for a while.

You could add a bunch of rectifiers and envelope followers on the individual
filter outputs.

Record the spectral dynamics of one sound, store these digitally in a
'spectral sequence' bank, then replay them to vocode another sound.

Perhaps you could even perform FFT analysis of a sampled wave over time then
have an algorithm to generate the control transients for your formant filter
bank, with added dynamic reconfiguration of centre frequencies and Qs to
provide the best quality vocoding.

Spectral resynthesis ?

Probably a lot of work...


 

Colin f

(sorry 'bout the html - no choice with outlook web access on exchange 2k)