Doepfer

I've been trying to use my A-114 to double the frequency of a waveform (as
suggested by some articles about modular synthesis), but couldn't get it to
work.
(After all, a ring modulator gives the sum and the difference of its inputs,
so having the same signal at both inputs would give only the sum, the same
waveform one octave higher, yes?)
It seems that the sound doesn't change much at all if I send the same sine
wave trough both its inputs.


Does anyone know why this doesn't work? Does it work on other synths?

Desperately trying to get something in the range of 15000-18000 Hz out my
A-110...

Thanks!

Mdimm

--- In Doepfer_a100@y..., unknown freak <ospengler@r...> wrote:
> Given that there would be no audible overtones in frequencies 
above
> about 10 kHz -- i.e. probably no real difference between the 
sound of a
> sine and a sawtooth -- why not assign this job to a self-
oscillating
> filter?

True. I've been doing that up until now when I wanted 
frequencies in that range. But the filters are busy doing 
something else sometimes, and I'd generally like to get this trick 
to work.

I've only got one A-110 (and no A-111's at all) at the moment, so 
using two synched oscillators is not possible with my setup.

Hey Mdimm,

After reading this, I had to try it too, and experienced the same problem. No difference between the A-110 VCO or the A-111 hi-end-VCO. 
I tried the A-114 ringmod as well as my Lindhof-ringmod and nothing was audible, not even visible on a oscilloscope.  Might be the effect of the 1496 chip used in both ringmodulators.
But try this: Take two VCOs having the same frequency and sync them additionally, then plug both sine outs into the ringmod. Now you have a doubled frequency although the doubled sine is modified a little bit thru the ringmod. Lacking a second A-110 at the moment i had to do this with one A-110 and one A-111. Don´t know how well it will work with two A-110s.

best,

Paul

  ----- Original Message ----- 



  I've been trying to use my A-114 to double the frequency of a waveform (as
  suggested by some articles about modular synthesis), but couldn't get it to
  work.
  (After all, a ring modulator gives the sum and the difference of its inputs,
  so having the same signal at both inputs would give only the sum, the same
  waveform one octave higher, yes?)
  It seems that the sound doesn't change much at all if I send the same sine
  wave trough both its inputs.


  Does anyone know why this doesn't work? Does it work on other synths?

  Desperately trying to get something in the range of 15000-18000 Hz out my
  A-110...

  Thanks!

  Mdimm




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

The A165 Trigger Modifier seems to be working okay as a frequency 
doubler in the audio range, but I don't have a scope and can't see 
how well it's holding up in the upper frequencies.

Another possibility would be to try AM using a VCA instead of the Ring 
Mod. This gives you both input frequencies in addition to the sum and 
difference, so you'd have to filter out the carrier frequency.

Joe

--- In Doepfer_a100@y..., "mdimmm" <mdimmm@h...> wrote:

> --- In Doepfer_a100@y..., unknown freak <ospengler@r...> wrote:
> > Given that there would be no audible overtones in frequencies 
> above
> > about 10 kHz -- i.e. probably no real difference between the 
> sound of a
> > sine and a sawtooth -- why not assign this job to a self-
> oscillating
> > filter?
> 
> True. I've been doing that up until now when I wanted 
> frequencies in that range. But the filters are busy doing 
> something else sometimes, and I'd generally like to get this trick 
> to work.
> 
> I've only got one A-110 (and no A-111's at all) at the moment, so 
> using two synched oscillators is not possible with my setup.

Given that there would be no audible overtones in frequencies above
about 10 kHz -- i.e. probably no real difference between the sound of a
sine and a sawtooth -- why not assign this job to a self-oscillating
filter?

"mdimmm@hotmail.com" wrote:

> 
> I've been trying to use my A-114 to double the frequency of a waveform (as
> suggested by some articles about modular synthesis), but couldn't get it to
> work.
> (After all, a ring modulator gives the sum and the difference of its inputs,
> so having the same signal at both inputs would give only the sum, the same
> waveform one octave higher, yes?)
> It seems that the sound doesn't change much at all if I send the same sine
> wave trough both its inputs.
> 
> Does anyone know why this doesn't work? Does it work on other synths?
> 
> Desperately trying to get something in the range of 15000-18000 Hz out my
> A-110...
> 
> Thanks!
> 
> Mdimm
> 
> 
> To unsubscribe from this group, send an email to:
> doepfer_a100-unsubscribe@yahoogroups.com
> 
> 
> 
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Not sure if I understand but are you trying to have 2 waveforms from 
1 VCO but one an octave higher?
If so just use a a-115 (audio divider), or a a-163 (frequency 
divider).

JOhn M




--- In Doepfer_a100@y..., "mdimmm@h..." <mdimmm@h...> wrote:
> I've been trying to use my A-114 to double the frequency of a 
waveform (as
> suggested by some articles about modular synthesis), but couldn't 
get it to
> work.
> (After all, a ring modulator gives the sum and the difference of 
its inputs,
> so having the same signal at both inputs would give only the sum, 
the same
> waveform one octave higher, yes?)
> It seems that the sound doesn't change much at all if I send the 
same sine
> wave trough both its inputs.
> 
> 
> Does anyone know why this doesn't work? Does it work on other 
synths?
> 
> Desperately trying to get something in the range of 15000-18000 Hz 
out my

> A-110...
> 
> Thanks!
> 
> Mdimm

The funny thing is, I just tried my A114 Ring Modulator for doubling 
frequency, and it's working just fine. I have the sine wave output 
from an A110 split with an A118 multiple and patched to both of the 
A114's inputs.

I wonder what's the deal with yours?

Joe

---- In Doepfer_a100@y..., "jmaddocks1975" <jmaddocks1975@y...> wrote:

> Not sure if I understand but are you trying to have 2 waveforms from 
> 1 VCO but one an octave higher?
> If so just use a a-115 (audio divider), or a a-163 (frequency 
> divider).
> 
> JOhn M
> 
> 
> 
> 
> --- In Doepfer_a100@y..., "mdimmm@h..." <mdimmm@h...> wrote:
> > I've been trying to use my A-114 to double the frequency of a 
> waveform (as
> > suggested by some articles about modular synthesis), but couldn't 
> get it to
> > work.
> > (After all, a ring modulator gives the sum and the difference of 
> its inputs,
> > so having the same signal at both inputs would give only the sum, 
> the same
> > waveform one octave higher, yes?)
> > It seems that the sound doesn't change much at all if I send the 
> same sine
> > wave trough both its inputs.
> > 
> > 
> > Does anyone know why this doesn't work? Does it work on other 
> synths?
> > 
> > Desperately trying to get something in the range of 15000-18000 Hz 
> out my
> > A-110...
> > 
> > Thanks!
> > 
> > Mdimm

--- In Doepfer_a100@y..., "buechlerjoe" <buechlerjoe@t...> 
wrote:
> The A165 Trigger Modifier seems to be working okay as a 
frequency 
> doubler in the audio range, but I don't have a scope and can't 
see 
> how well it's holding up in the upper frequencies.
> 
> Another possibility would be to try AM using a VCA instead of 
the Ring 
> Mod. This gives you both input frequencies in addition to the 
sum and 
> difference, so you'd have to filter out the carrier frequency.
> 
> Joe

That might work, thanks. 

Curious though, that the trick with the A-114 seems to work on 
some people's modules, but not all.
I used the same setup as you describe in your other message, 
A-110 sine via A-180 into both A-114 inputs.