Doepfer

In a message dated 11/28/2002 7:47:51 PM Eastern Standard Time, 
synth_freak_2000@yahoo.com writes:


> a154
> control section be able to reach audio freqs!!!a
> graphic vco(a155) with random running mode or vc
> addressable steps would be awesome



balis,
i think that the added features of the a-154 would certainly expand the 
possibilities of using the sequencer as a "grahic vco", my experiments in 
this area ( both with a previously owned serge tkb and the a-155 ) have led 
me to feel that the "graphic vco" idea has merit for control waveforms but 
when reaching audio frq`s, there isn`t enough variation to merit the extra 
effort - the standard waveform choices provide a reasonable spread of 
harmonic series for "day to day" use and the addition of things like linear 
fm and various waveshapers ( doepfer a-136 is nice, i can also recommend the 
blacet/wiard  mini-wave ) provide enough extra waveform variety with less 
effort and less expensive circuitry. better, IMHO, to make it the "best" 
sequencer it can be and if audio use is limited, so be it. 
not to have you think i`m a complete reactionary, i think that there is good 
work to be done in the complex vco area and i`m waiing for someone to have 
the vision to extend their linear fm vco to  thru zero operation which is a 
definite improvement over regular ( ala a-111 ) fm, just as one simple 
example.
best,
dave




[Non-text portions of this message have been removed]

> i think that the added features of the a-154 would certainly expand 
> the possibilities of using the sequencer as a "grahic vco", my 
> experiments in this area ( both with a previously owned serge tkb 
> and the a-155 ) have led 
> me to feel that the "graphic vco" idea has merit for control 
> waveforms but 
> when reaching audio frq`s, there isn`t enough variation to merit the 
> extra 
> effort - the standard waveform choices provide a reasonable spread 
> of 
> harmonic series for "day to day" use and the addition of things like 
> linear 
> fm and various waveshapers ( doepfer a-136 is nice, i can also 
> recommend the 
> blacet/wiard  mini-wave ) provide enough extra waveform variety with 
> less 
> effort and less expensive circuitry. 

I dunno, you've probably played with this concept much more than I 
have. I currently have a bank of Regelwerk faders patched to the A155 
via the A191 so it can be used as a true graphic VCO, and biased the 
pre-out jack with a negative voltage. I can get quite dramatic changes 
in the harmonic content by adjusting the faders in real time, and 
I can also record the waveshaping session on a midi sequencer.

It's possible that I could do something very similar with the 
distortion/waveshaper, but it doesn't seem like there would be 
anywhere near as much control. 

In any case, it's a lot of fun.

Joe

hi joe,
and why do you need to add a negative voltage to the
pre out of the a155?i thought that ,in order to use
the a155 as a graphic vco, all you had to do is pass
it thru a filter module to transform its voltage
output to AC.
bakis.



--- Joe Buechler <buechlerjoe@toadmail.com> wrote:
> 
> > i think that the added features of the a-154 would
> certainly expand 
> > the possibilities of using the sequencer as a
> "grahic vco", my 
> > experiments in this area ( both with a previously
> owned serge tkb 
> > and the a-155 ) have led 
> > me to feel that the "graphic vco" idea has merit
> for control 
> > waveforms but 
> > when reaching audio frq`s, there isn`t enough
> variation to merit the 
> > extra 
> > effort - the standard waveform choices provide a
> reasonable spread 
> > of 
> > harmonic series for "day to day" use and the
> addition of things like 
> > linear 
> > fm and various waveshapers ( doepfer a-136 is
> nice, i can also 
> > recommend the 
> > blacet/wiard  mini-wave ) provide enough extra
> waveform variety with 
> > less 
> > effort and less expensive circuitry. 
> 
> I dunno, you've probably played with this concept
> much more than I 
> have. I currently have a bank of Regelwerk faders
> patched to the A155 
> via the A191 so it can be used as a true graphic
> VCO, and biased the 
> pre-out jack with a negative voltage. I can get
> quite dramatic changes 
> in the harmonic content by adjusting the faders in
> real time, and 
> I can also record the waveshaping session on a midi
> sequencer.
> 
> It's possible that I could do something very similar
> with the 
> distortion/waveshaper, but it doesn't seem like
> there would be 
> anywhere near as much control. 
> 
> In any case, it's a lot of fun.
> 
> Joe
> 
> 


=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner-moderator

Hi bakis

You're right about that. It works without the negative voltage. Just 
being anal, I guess.

Joe

--- In Doepfer_a100@y..., bakis Sirros <synth_freak_2000@y...> wrote:

> hi joe,
> and why do you need to add a negative voltage to the
> pre out of the a155?i thought that ,in order to use
> the a155 as a graphic vco, all you had to do is pass
> it thru a filter module to transform its voltage
> output to AC.
> bakis.
> 
> 
> 
> --- Joe Buechler <buechlerjoe@t...> wrote:
> > 
> > > i think that the added features of the a-154 would
> > certainly expand 
> > > the possibilities of using the sequencer as a
> > "grahic vco", my 
> > > experiments in this area ( both with a previously
> > owned serge tkb 
> > > and the a-155 ) have led 
> > > me to feel that the "graphic vco" idea has merit
> > for control 
> > > waveforms but 
> > > when reaching audio frq`s, there isn`t enough
> > variation to merit the 
> > > extra 
> > > effort - the standard waveform choices provide a
> > reasonable spread 
> > > of 
> > > harmonic series for "day to day" use and the
> > addition of things like 
> > > linear 
> > > fm and various waveshapers ( doepfer a-136 is
> > nice, i can also 
> > > recommend the 
> > > blacet/wiard  mini-wave ) provide enough extra
> > waveform variety with 
> > > less 
> > > effort and less expensive circuitry. 
> > 
> > I dunno, you've probably played with this concept
> > much more than I 
> > have. I currently have a bank of Regelwerk faders
> > patched to the A155 
> > via the A191 so it can be used as a true graphic
> > VCO, and biased the 
> > pre-out jack with a negative voltage. I can get
> > quite dramatic changes 
> > in the harmonic content by adjusting the faders in
> > real time, and 
> > I can also record the waveshaping session on a midi
> > sequencer.
> > 
> > It's possible that I could do something very similar
> > with the 
> > distortion/waveshaper, but it doesn't seem like
> > there would be 
> > anywhere near as much control. 
> > 
> > In any case, it's a lot of fun.
> > 
> > Joe
> > 
> > 
> 
> 
> =====
> synthfreak(parallel worlds)
> athens-greece
> [Doepfer_a100] group owner-moderator