new MOOGERFOOGER pitch-shifter!!!!
-
- Posts: 34
- Joined: Wed Apr 06, 2005 12:55 pm
new MOOGERFOOGER pitch-shifter!!!!
hey guys
I read about new moogerfoogers all around this forum the last weeks and I mentioned that nobody thought of a real moogerfooger pitch-shifter. Like POG (ehx) for example or the WHAMMY(ies)... huh? what do you think? imagine an analog pitch-shifter where you would be able via the cv inputs to control higher octaves, fifths e.t.c. with an exp. pedal. An analog moogerfooger whammy...
Mike get to work!!!
regards
I read about new moogerfoogers all around this forum the last weeks and I mentioned that nobody thought of a real moogerfooger pitch-shifter. Like POG (ehx) for example or the WHAMMY(ies)... huh? what do you think? imagine an analog pitch-shifter where you would be able via the cv inputs to control higher octaves, fifths e.t.c. with an exp. pedal. An analog moogerfooger whammy...
Mike get to work!!!
regards
www.myspace.com/gravitysaysi
gravitysays_i
gravitysays_i
-
- Posts: 103
- Joined: Mon Aug 04, 2003 5:43 pm
- Location: Northeast USA
You can get lower pitches easily enough with a frequency divider, it's higher pitches that are tricky. It only works with a monophonic signal, too. It's kind of possible with a ring modulator, but far from the results you'd get with a digital device.
The ideal situaion would be a digital device with CV inputs for control.
The ideal situaion would be a digital device with CV inputs for control.
-
- Posts: 3
- Joined: Mon Oct 10, 2005 10:46 pm
Maybe we can't have a pitch shifter...but a Bode frequency shifter would make one sweet looking moogerfooger ![Shocked :shock:](./images/smilies/icon_eek.gif)
![Shocked :shock:](./images/smilies/icon_eek.gif)
guitars, amps, normal pedals;
MF101, MF102, MF103, MuRF, CP251;
Sequential Circuits Prophet 600;
Roland JX-8P, Roland Alpha Juno 2;
Ensoniq ESQ-M, Yamaha TX802, Kawai K5000r;
Alesis Quadrasynth Plus Piano
MF101, MF102, MF103, MuRF, CP251;
Sequential Circuits Prophet 600;
Roland JX-8P, Roland Alpha Juno 2;
Ensoniq ESQ-M, Yamaha TX802, Kawai K5000r;
Alesis Quadrasynth Plus Piano
-
- Posts: 800
- Joined: Thu May 26, 2005 8:52 pm
- Location: Portland, OR
- Contact:
An analog octave pedal is easy to do because you are just multiplying the signal by itself. Similar to ring modulation only instead of multiplying the input signal by a carrier signal, you simply multiply it by itself. This results in two frequencies: one at twice the frequency of the input (doubling frequency means it sounds an octave higher) and one at 0 Hz (which is inaudible). You can do it with the Moogerfooger Ring Mod by using a Y-cable to insert your audio input into the carrier in. This is not the same as what a pitch shifter can do.
I was way ahead of you on the pitch shift trick with the ring mod - and it doesn't work very well. It only works for waveforms with few harmonics and you only get octave pitch shift, no semitone or micropitch shift.
I asked Moog Music about the ring mod trick and they said it is a limitation of the multiplier IC used in the ring mod. That makes sense if you do the math with higher harmonics - the modulated harmonics increase in frequency EXPONENTIALLY and they exceed the bandwidth of the IC in a hurry.
I asked Moog Music about the ring mod trick and they said it is a limitation of the multiplier IC used in the ring mod. That makes sense if you do the math with higher harmonics - the modulated harmonics increase in frequency EXPONENTIALLY and they exceed the bandwidth of the IC in a hurry.
-
- Posts: 800
- Joined: Thu May 26, 2005 8:52 pm
- Location: Portland, OR
- Contact:
An octave pedal is a divider, not a multiplier. It generates a pitch that is an octave lower than the original. Divider circuits are much simpler than multipliers. The simplest divider can be built from a TTL J-K flip-flop IC.
That's how they make suboscillators for VCOs - it's an octave divider circuit.
The only con with dividers is that the output waveform is a square wave. You can filter it but in most cases it won't resemble the harmonic structure of the original waveform.
That's how they make suboscillators for VCOs - it's an octave divider circuit.
The only con with dividers is that the output waveform is a square wave. You can filter it but in most cases it won't resemble the harmonic structure of the original waveform.
-
- Posts: 34
- Joined: Wed Apr 06, 2005 12:55 pm
hey... how come electroharmonix is doing it??? ( www.ehx.com ..POG pedal..) If electroharmonix is doing it then moog will definetely do it better. right?
www.myspace.com/gravitysaysi
gravitysays_i
gravitysays_i
-
- Posts: 800
- Joined: Thu May 26, 2005 8:52 pm
- Location: Portland, OR
- Contact: