jhhl.net: P600 update

j h h l . n e t: P600 Firmware update

This is some variant firmware for GliGli's Prophet 600 Teensy++ upgrade. It merely adds two more shapes to the LFO: a four step shape and an eight step shape.

Here's an audio example:

Here's the link to the firmware's .syx file, which you can load into your Teensy using the instructions on page 10 of the Version 2 Prophet 600 Firmware Upgrade instructions file (at least, it's on page 10 in English!) After you load it and reboot, it will say "JHHL's P600 upgrade Ver 2.00" instead of "GliGli's P600 upgrade ...", no offense to GliGli, but I wanted to see right away which version was running!
Here's the link to the step4/step8 sysex, have fun!
The way to get to the new shape is exactly the same technique as with the other shapes: use keypad 1 (or TO TAPE + keypad 1 if you are using a preset) and turn the speed knob to select your LFO shape pairs. It'll be the last one.

Here's an audio example of another update that I'm working on: it slows down the 8 step shape and replaces the 4 step one with a random sequencer
The "sequence" LFO cycles through 16 values with an algorithm which I may fiddle with somewhat:

3/8 of the time, it picks a random value.
- The rest of the time, it picks whatever was last chosen 5/8s of the time (making a longer note)
- Otherwise, it randomly picks from whatever was already chosen.

That way, it puts a lot of redundant and long values in the sequence. Of course, it's completely microtonal, so you get some pretty weird micro sequences.
To create a new sequence, flip the LFO shape switch to the 8-step (up) and then back to random (down).

Here's the link to the seq/step8 sysex (Sept 7, 2014 version)

p600fw is GPL 3.0, so here's the source for my version: p600-jhhl-fw.zip
The original repository is at : https://github.com/gligli/p600fw.git (Sept 8, 2014)