[sdiy] New Octave Cat Website

[John Loffink]

I posted this some time ago to the SDIY list:

 

Some differences: 
SRM: No pink noise 
SRM: No ring modulator 
Odyssey: No cross modulation by VCOs 
SRM: 2x3 way FM switches, Odyssey 2x2 way FM switches 
Odyssey: No AR FM of VCOs 
SRM: Sine/DC pulse width modulation, and only on VCO1, square wave only on 
VCO2, Odyssey has sine/ADSR modulation 
Odyssey: no suboctave waveforms on VCOs 
Odyssey: no triangle waveform on VCO1 
Odyssey: switch selection of VCO waveforms and noise/RM with mixing 
sliders, SRM has slider per VCO waveform and noise 
SRM: no HPF 
SRM VCF: 2 FM switches and levels instead of Odyssey's 3, but has separate 
keyboard tracking knob 
Odyssey VCF: no modulation from VCO1 
Odyssey: no LFO sine modulation delay 
SRM ADSR trigger source/repeat is 3 way switch, Odyssey is 2 switches 
SRM: no AR trigger source selection, is always keyboard 
SRM VCO1 Audio on/off switch to filter, when using at low frequencies to 
modulate VCO2 or the filter or used as S&H source 
SRM VCA has a single volume control and ADSR/AR/bypass mode (no envelopes) 
switch, Odyssey has intial gain and AM amount level/switch 
SRM S&H source is noise or VCO1, Odyssey has 2 switch selections and sliders

 

John Loffink

The Microtonal Synthesis Web Site

http://www.microtonal-synthesis.com

The Wavemakers Synthesizer Web Site

http://www.wavemakers-synth.com


 

Very nice! Lots of good info. You might add a link to Mark Glinsky's Manual
Manor, where schematics can be purchased. I haven't seen Cat schematics
anywhere else (but then again, I haven't looked too hard). Another section
that might be interesting would be a side by side Odyssey vs. Cat
comparison. They are VERY similar synths, but each has a few tricks of its
own. Fer example: 

Cat

   Triangle wave on VCO1

   Sub Octave on both VCOs

   Ability to freely mix available waves (One of the Cat's neatest features)

   "Poly" and "Mono" keyboard modes (the 'two note" Ody keyboard is limited
at best)

 

Ody

   PWM on both VCOs, including PWM depth slider and additional mod source

   (PWM on Cat is on VCO1 only and mod choice is only LFO sine or DC)

   Wider range of S/H input sources

   "Lag" control on S/H output
   Wider range of VCF mod sources
   White or pink noise available

 

Anyway, I like your site, and look forward to seeing more of it in the
future!

 

 

Tim (Odyssey nut, but likes Cats and cats too) Servo
 

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