GliGli P600 OS Ver 2.28 Noise Mod JRS

I updated the OS to version 2.28.

This adds "To Tape" + 444 menu option for assigning the poly mod filter env to modulate the pitch of VCO A only, VCO B only, or both.


This is great for the creation of brass sounds and EDM leads.


The default is the factory VCO A only.

Here is the link to a .ZIP for the .SYX and .HEX file

p600firmware V2_28.zip



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...
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 ...
Read more

Gligli P600 Noise Mod Version 2.20 JRS

  I updated Gligli 2.1 RC3 to Version 2.20 Noise Mod by adding the following features: 1) Three (3) new LFO waveforms added: reverse saw (revsaw) from Overcycler   gligli/overcycler: Hybrid polyphonic wavetable ... - GitHubgithub.com › gligli › overcycler   as well as adding Step8 and Seq from JHHL's code  http://jhhl.net/Software/p600.html  The new LFO waveforms are paired as follows:  Step8-RevSaw Seq-none Thus, you would select "step8-RevSaw" and the LFO waveform switch would be in the "up" position (like for triangle, saw, and sine) to select RevSaw. Note, if the LFO switch is in the "up" position and "Seq-none" is selected, currently the LFO would be disabled, e.g., there would be no output. I am going to replace "none" with a new waveform when I get a chance. I may add Step4 just to plug in the hole. 2) New Pitchbender target VCO B only (note the second new pitch bender target "PW" does not work yet)  3) New noise so...
Read more