Notable changes:
- Fix modulation delay not modulating release stage.
- Fix no modulation delay still has a small delay.
- Fix last parameter not being stored in manual mode when switching to preset mode.
- CV update optimisations allowed me to add one more wait state, may fix some problems on lazy P600s.
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-05-24/
By the way, the only major thing preventing me from releasing a stable 2.0 version is the manual, as it needs to be updated to reflect changes in features / user interface.
So, if anybody is willing to spend some time to update the english master version, please contact me.
Saturday, May 24, 2014
Sunday, May 4, 2014
New DIY project: standalone Juno-60 chorus clone
I sold my JX-3P a while ago, but I found out I missed its chorus.
So I decided to clone it, and since the Juno-60 one is often described as better, this is the one I chose as a basis.
All components are still available, except maybe the BBDs, but you can source them from chinese ebay sellers, and they seem to be genuine.
All I did was to change input & output stages, and use a LFO design inspired from the BOSS CE-2, the remaining parts stayed mostly the same.
Enough said, here's the finished PCB:
And here's how it sounds (base sound from my Prophet 600):
Some more files: sfx.gligli.free.fr/zik/juno-chorus-clone/juno-chorus-clone.7z (pics, schematics, FLAC demo)
And, since it's a free/open source project, the project page: http://github.com/gligli/juno-chorus-clone
The debug phase went mostly well, but I still have to update the PCB from the fixes I made on the schematics, so better wait a little if you want to build one!
Edit:
PCB update done, should be ok to build!
Edit2:
I compared it with a Juno-60 recording and found out the chorus was a bit weak on mine. Turns out I copied a resistor value wrong in the BBDs output stages.
I fixed it and now it sounds really close to the original!
Edit3:
Some more changes to input and output levels.
Here's a second demo on polyphonic & arpeggio sounds:
So I decided to clone it, and since the Juno-60 one is often described as better, this is the one I chose as a basis.
All components are still available, except maybe the BBDs, but you can source them from chinese ebay sellers, and they seem to be genuine.
All I did was to change input & output stages, and use a LFO design inspired from the BOSS CE-2, the remaining parts stayed mostly the same.
Enough said, here's the finished PCB:
And here's how it sounds (base sound from my Prophet 600):
Some more files: sfx.gligli.free.fr/zik/juno-chorus-clone/juno-chorus-clone.7z (pics, schematics, FLAC demo)
And, since it's a free/open source project, the project page: http://github.com/gligli/juno-chorus-clone
The debug phase went mostly well, but I still have to update the PCB from the fixes I made on the schematics, so better wait a little if you want to build one!
Edit:
PCB update done, should be ok to build!
Edit2:
I compared it with a Juno-60 recording and found out the chorus was a bit weak on mine. Turns out I copied a resistor value wrong in the BBDs output stages.
I fixed it and now it sounds really close to the original!
Edit3:
Some more changes to input and output levels.
Here's a second demo on polyphonic & arpeggio sounds:
Sunday, April 20, 2014
New P600fw alpha (april 20)
Notable changes:
- More tuner tweaks, filter tuning got much better on my P600 (to the point of having almost perfect filter unison).
- Modulation delay improvements: after the modutation delay, modulation increases exponentially over a period of time equal to the modulation delay.
- Added "whole tone" bender range (parameter value is "2nd").
- Assigner legato fixes.
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-04-20/
- More tuner tweaks, filter tuning got much better on my P600 (to the point of having almost perfect filter unison).
- Modulation delay improvements: after the modutation delay, modulation increases exponentially over a period of time equal to the modulation delay.
- Added "whole tone" bender range (parameter value is "2nd").
- Assigner legato fixes.
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-04-20/
Monday, April 7, 2014
P600fw MIDI CC map as of today
Here it is: http://sfx.gligli.free.fr/zik/p600/midi_cc_map_2014_04_07.pdf
As usual, continuous parameters have both a coarse and a fine CC, to get full 14bit precision.
"Stepped" parameters work by dividing the 0-127 range is as many zones as there is choices for the parameter.
Eg: "Unison" is off for 0-63 and on for 64-127.
As usual, continuous parameters have both a coarse and a fine CC, to get full 14bit precision.
"Stepped" parameters work by dividing the 0-127 range is as many zones as there is choices for the parameter.
Eg: "Unison" is off for 0-63 and on for 64-127.
Monday, March 17, 2014
New P600fw alpha (march 17)
This one brings some nice improvements and a few bugfixes:
- When an extended parameter is selected, its current value is displayed.
- Modulation delay (eg. on vibrato) now has a progressive start (about half a second until full level is reached, seems nice and musical to me, but I'm open to suggestions).
- Many fixes to unison mode, should be much more stable now.
- Slowed down text scrolling a little, to help readability.
- Misc. other bugfixes.
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-03-17/
- When an extended parameter is selected, its current value is displayed.
- Modulation delay (eg. on vibrato) now has a progressive start (about half a second until full level is reached, seems nice and musical to me, but I'm open to suggestions).
- Many fixes to unison mode, should be much more stable now.
- Slowed down text scrolling a little, to help readability.
- Misc. other bugfixes.
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-03-17/
Sunday, March 9, 2014
New P600fw alpha (march 9)
This time I tried to get my frequency measurement routine for the tuner closer to the way it's described in the service manual, hoping that it would fix the remaining tuning problems.
If it gets better or worse, please let me know...
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-03-09/
If it gets better or worse, please let me know...
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-03-09/
Saturday, March 1, 2014
New P600fw alpha (march 1)
I didn't have much time to dedicate to my synthesizer projects these last months, but here's a new alpha of P600fw with the following changes:
- Fixed broken exponential envelopes interpolation (was causing stepping).
- Removed MIDI soft-thru (it wasn't an intended feature).
- Added 1/1 and 1/2 arpeggiator external clock ratios (usefull for tape sync).
- Made minor tweaks to the tuner.
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-03-01/
- Fixed broken exponential envelopes interpolation (was causing stepping).
- Removed MIDI soft-thru (it wasn't an intended feature).
- Added 1/1 and 1/2 arpeggiator external clock ratios (usefull for tape sync).
- Made minor tweaks to the tuner.
Download links at: http://sfx.gligli.free.fr/zik/p600/dev/2014-03-01/
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