Doepfer

I'm interested in filters creating formants. It's not about human
voice vowels or the sounds usually produced by by vocoders, but rather
the formants associated with certain acoustic instruments, like cello,
trumpet, trombone, French horn, etc.
Probably nothing can beat the Yamaha FS1R when it comes to parameters
 shaping formants, but like many other digitals it can't process
external sounds. I've read the specs for Doepfer A-104 Trautonium
Formant Filter, A-127 VC Resonance Filter, and A-128 Fixed Filter
Bank, as well as Analogue Systems RS-110 Multimode filter, and RS-360
Vocal /Phase Filter Bank. Certain details caught my interest like the
input sensitivity with A-104 that easily creates distortion and the
RS-110 external resonance feedback chain where reverbed signals can be
fed back. Some have extensive CV features like A-127, but unless
programmability is desired, this is not a prerequisite since formats
have fixed center frequences, bandwidth, etc, AFAIK. 
Unfortunately there are no audio samples for any of the above
mentioned, so I like to ask if any of the list members have looked
into/ experimented with instrument formats. Is there any reading to be
recommended?
I'm new to this list, but it looks quite promising/Lars

the A-128 fixed filter bank is quite good at imitating fx. violin 
sounds and the likes. And can also be used to imitate vovel sounds. 
So that would be my choice.

Keld

--- In Doepfer_a100@yahoogroups.com, "lars_arnwald" 
<lars.arnwald@...> wrote:
>
> I'm interested in filters creating formants. It's not about human
> voice vowels or the sounds usually produced by by vocoders, but 
rather
> the formants associated with certain acoustic instruments, like 
cello,
> trumpet, trombone, French horn, etc.
> Probably nothing can beat the Yamaha FS1R when it comes to 
parameters
>  shaping formants, but like many other digitals it can't process
> external sounds. I've read the specs for Doepfer A-104 Trautonium
> Formant Filter, A-127 VC Resonance Filter, and A-128 Fixed Filter
> Bank, as well as Analogue Systems RS-110 Multimode filter, and RS-
360
> Vocal /Phase Filter Bank. Certain details caught my interest like 
the
> input sensitivity with A-104 that easily creates distortion and the
> RS-110 external resonance feedback chain where reverbed signals 
can be
> fed back. Some have extensive CV features like A-127, but unless
> programmability is desired, this is not a prerequisite since 
formats
> have fixed center frequences, bandwidth, etc, AFAIK. 
> Unfortunately there are no audio samples for any of the above
> mentioned, so I like to ask if any of the list members have looked
> into/ experimented with instrument formats. Is there any reading 
to be

> recommended?
> I'm new to this list, but it looks quite promising/Lars
>

The problem with a fixed filter banks for me is experimenting with 
bandwidths. You have to manually adjust each adjacent band carefully 
to get the correct effect and that can be cumbersome. I prefer 
bandpass filters with resonance controls. I use three A-121 Multimode 
filters to not only get fixed resonances but variable ones like 
speech.

Another way is to use the A-129 Vocoder to automatically simulate 
acoustic instrument resonances. For example, feed a looped violin or 
oboe sample from your computer, external synth,  A-112, etc. into the 
vocoder and to resynthesize the spectral shape.


--- In Doepfer_a100@yahoogroups.com, "lars_arnwald" 
<lars.arnwald@...> wrote:
>
> I'm interested in filters creating formants. It's not about human
> voice vowels or the sounds usually produced by by vocoders, but 
rather
> the formants associated with certain acoustic instruments, like 
cello,
> trumpet, trombone, French horn, etc.
> Probably nothing can beat the Yamaha FS1R when it comes to 
parameters
>  shaping formants, but like many other digitals it can't process
> external sounds. I've read the specs for Doepfer A-104 Trautonium
> Formant Filter, A-127 VC Resonance Filter, and A-128 Fixed Filter
> Bank, as well as Analogue Systems RS-110 Multimode filter, and RS-
360
> Vocal /Phase Filter Bank. Certain details caught my interest like 
the
> input sensitivity with A-104 that easily creates distortion and the
> RS-110 external resonance feedback chain where reverbed signals can 
be
> fed back. Some have extensive CV features like A-127, but unless
> programmability is desired, this is not a prerequisite since formats
> have fixed center frequences, bandwidth, etc, AFAIK. 
> Unfortunately there are no audio samples for any of the above
> mentioned, so I like to ask if any of the list members have looked
> into/ experimented with instrument formats. Is there any reading to 
be

> recommended?
> I'm new to this list, but it looks quite promising/Lars
>