MOTM

I have an interest in imparting human voice qualities to various 
sounds as has been done by Tomita, et al.  (Not using a vocoder - 
purely by mucking with the harmonic spectra.) Since I don't have the 
proper number of modules to do this yet, I was wondering if anyone in 
the group has played with such setups.  My specific question relates 
to VC of the filters... should the keyboard control voltage cause the 
filter cutoff frequencies to track the pitch source on a 1:1 basis to 
preserve the sound?  Or is the tracking less than 1:1, or are the 
filters simply fixed and the useful range is less than 2 octaves?

Another question is, what is the "best" waveform to use as the 
excitation source for 'voice' configurations?  (I was thinking of an 
80/20 pulse from a 300 VCO but would a sawtooth be better?)  I know 
that the excitation wave has to be harmonic-rich, but is there 
a "best"?  Okay, that spawns another question... is there a waveform 
that is generally accepted as being the most harmonic-rich (other 
than white/pink noise!)?

Cheers!
Tom Farrand

I think a pr of band pass filter is good for this.  I do alot of this on a
Yamaha FS1R but that uses formant shaping.  For anyone with the miniwave, are
there some bases for voice included in that ?
Jim

mbedtom@... wrote:

> 
> I have an interest in imparting human voice qualities to various
> sounds as has been done by Tomita, et al.  (Not using a vocoder -
> purely by mucking with the harmonic spectra.) Since I don't have the
> proper number of modules to do this yet, I was wondering if anyone in
> the group has played with such setups.  My specific question relates
> to VC of the filters... should the keyboard control voltage cause the
> filter cutoff frequencies to track the pitch source on a 1:1 basis to
> preserve the sound?  Or is the tracking less than 1:1, or are the
> filters simply fixed and the useful range is less than 2 octaves?
> 
> Another question is, what is the "best" waveform to use as the
> excitation source for 'voice' configurations?  (I was thinking of an
> 80/20 pulse from a 300 VCO but would a sawtooth be better?)  I know
> that the excitation wave has to be harmonic-rich, but is there
> a "best"?  Okay, that spawns another question... is there a waveform
> that is generally accepted as being the most harmonic-rich (other
> than white/pink noise!)?
> 
> Cheers!
> Tom Farrand
> 
> 
> 
> 
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

This is a cool way to impart musicality into your patches.  Some of 
my favorite intruments can be very voice-like: violin, guitar, etc.

The 410 has 3 filters tuned to vocal formant ranges.  Listen to the 
(completely strange) free-running patch that Robert Rich did on the 
news section of Paul's site.  Very vocal, if somewhat demented.

The MiniWave has a bank of vocal formants (bank 8) and I've played 
around with switching these under CV for vocal effects.

For lots of harmonic content, mix both saw and square and tweak the 
PWM under CV.  Add a second VCO slightly detuned for more, and a 
little 120 for even more.  Filters in series then help to shape the 
sound.

Mike

--- In motm@y..., mbedtom@a... wrote:
> I have an interest in imparting human voice qualities to various 
> sounds as has been done by Tomita, et al.  (Not using a vocoder - 
> purely by mucking with the harmonic spectra.) Since I don't have 
...

Yes, the MiniWave has a full bank of vocal formant waves.
Good raw material.

Moe

>>>>> 
I think a pr of band pass filter is good for this.  I do alot of this 
on a
Yamaha FS1R but that uses formant shaping.  For anyone with the 
miniwave, are
there some bases for voice included in that ?
Jim

mbedtom@a... wrote:
> 
> I have an interest in imparting human voice qualities to various
> sounds as has been done by Tomita, et al.  (Not using a vocoder -
> purely by mucking with the harmonic spectra.) Since I don't have the
> proper 
<<<<<

>>My specific question relates to VC of the filters... should the keyboard 
control voltage cause the filter cutoff frequencies to track the pitch source 
on a 1:1 basis to 
preserve the sound?  Or is the tracking less than 1:1, or are the filters 
simply fixed and the useful range is less than 2 octaves?<<

Typically you would use a number of bandpass filters that are tuned to fixed 
frequencies.  But those will be different depending on whether you are doing 
male/female or what vowel sound you are trying to get.  However, synthesizer 
filters never seem to have steep enough rolloffs to get a really clear sound. 
 You really need to gang up on them to get rid of a lot of the synthetic 
electronic waveform sound.

>>Another question is, what is the "best" waveform to use as the excitation 
source for 'voice' configurations?  (I was thinking of an 80/20 pulse from a 
300 VCO but would a sawtooth be better?)<<

Pulse is better than sawtooth in most cases, but mixing in noise really helps 
a lot, especially for a large chorus of voices.  That's what I did on a Nord 
Modular Mellotron patch I did.  Perhaps even using noise as a modulation 
source to roughen up the sound would also help.

-Elhardt

>I have an interest in imparting human voice qualities to various sounds
as has been done by Tomita, et al.

Now correct me if I'm wrong... but I thought that Tomita used old
Roland/Korg stuff to get some of the vocal sounds. The Roland SH-2000
has a 'Voice' preset that sounds very similar. It does it by a
combination of selected waveforms, fixed filtering and the dynamic
ladder filter. And a little wheeeep at the start of every note. That
comes from a dedicated EG blipping the frequency of the VCO slightly at
every new note.

Mind you, they may have got the idea from Tomita and bunged it on there
afterwards. Works well though.

Regards,

Tony Allgood, Penrith, Cumbria, England

www.oakleysound.com
My music: www.mp3.com/taklamakan