Gligli P600 Noise Mod V2.26 JRS Overview




Gligli P600 Noise mod V2.26B JRS:

https://github.com/matrix12x/p600fw/...717999ed60cf98


History

=======
- all revisions based on Gligli V2.1 RC3
- V2.20 JS - added noise mod and new LFO waveforms step8, seq, RevSaw
- V2.21 JS - added new LFO waveforms step4
- V2.22 JS - added 4bit Triangle and 6bit Sine
- V2.23 JS - fixed patch compatibility bug introduced in V 2.22
- V2.24 JS - reverted polymod bug to RC1 behavior 
- V2.25 JS - added new vibrato waveforms and Vibrato targets
- V2.26B JS - fixed post “Tune” volume bug introduced in V2.25

V2.25 includes -
LFO has 6 new waveforms:
Step8, RevSaw, Seq, Step4, Bit_Tri, Bit_Sine
New Pitch Bender targets:PW(VCO A), and VCO B only 

New noise source setting control. Pressing "to tape" 0 a second time lets you adjust the VCF CV input level and store it with a patch. I modified my P600 to add a noise source and use this parameter to adjust the noise source per patch, hence in the UI this displays as "noise". However, in an unmodified Prophet 600, this parameter controls the VCF CV input level.

Vibrato now has: 1) all LFO waveforms (CC74), 2) high and low range (CC75), and 3) target AB, A, B, VCA and Noise level (CC76)

Added channel aftertouch (e.g., channel pressure). If you use an external controller that has aftertouch controlling the Prophet 600, the Prophet 600 now uses this MIDI channel aftertouch data to modulate whatever the Mod-wheel is modulating. For example, I used it to apply vibrato to notes.

Added Poly-Aftertouch (e.g., per note)

Also added are:
CC7 Volume 
CC120 (All sound off)
CC123 (All notes off)

To use vibrato waveforms "to tape" + 1 three times

To use vibrato range "to tape" + 2 three times

To use vibrato targets "to tape" + 3 three times

Comments

Post a Comment

Popular posts from this blog

Prophet 600 Noise Source Modification

Image
So, I modified my  Prophet 600  to have a noise source, with a level parameter that is storable with a patch. I was inspired by a Japanese  Prophet 600  mod I saw online a while back. He documented what he did very well.  http://prophet-600.blogspot.com/2014/09/prophet-600-adding-noise-waveform.html The goals were as follows: 1) Modify the GliGli FW to add a noise source using what was the external filter CV input  2) rewire the external filter CV so I still have an external filter CV and it no longer goes thru U458 (CEM 3360) 3) build a hardware noise source run it through U458 which is under software control, accessible using "To tape" and pressing 0 twice ("To tape 0 twice" is/was a duplicate arpeggio speed control.) So here is where I'm at: 1) The code is done and works. I can save and recall the Noise parameter and the code controls U458 to make the noise level settable by the front panel. The code I modified so far seems stable. 2)  I cut a trace leading f
Read more

Prophet 600 Poly Mod VCO B to modulate VCO A

Image
So, I don't like how the Prophet 600's VCO A changes in pitch (not just timbre) when using Poly Mod VCO B to modulate the pitch of VCO A even on the original factory OS. It is not a software thing, it's the hardware itself.  The circuit that feeds VCO B's output to the CV input of VCO A is not AC coupled (it does not have a DC blocking cap). Thus a DC offset is introduced which changes the tuning of VCO A by raising the pitch. I hate this. I never use Poly Mod VCO B to modulate the pitch of VCO A.  I held down a single note with Saw wave selected on VCO A and VCO B was zero volume. No  Poly Mod . Here I added some FM (frequency modulation) to VCO A (Saw wave) in an unmodified Prophet 600 by using Poly Mod VCO B to VCO A frequency. If you look at the fundamental, it goes up in frequency relative to the first image. My thought were to mod the Prophet 600 to add a DC blocking cap, for example between the 4061 (e.g., U429 pin 1) and the CV in (pin 15) for VCO A (e.g., U28 C
Read more

Gligli P600 Noise Mod V2.32 JRS

Image
*****New V2.32 update****** I've updated the OS V2.32 to add as a vibrato LFO-target: filter resonance. It's very cool, especially when the filter cutoff frequency is relatively low. For example, I set the vibrato shape to pulse or random and the depth to full and it has a nice effect. The update also increases the range for the target of noise level (CV in on a P600 without the noise source mod from my earlier post) and speeds up the main volume knob considerably.  To be honest, I leave mine on max all the time, and never saw its speed as an issue. But I saw an easy fix and did it. Zip file with the .syx and .hex located here:  Download
Read more