Recent Posts

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PreenFM2 / Re: New firmware 2.07 (December 16th 2016)
« Last post by falfa on Today at 12:22:21 AM »
Yay, new firmware, I missed it. Great, I love this :-)
PreenFM2 / Re: Output volume vs polyphony..
« Last post by opus.quatre on May 16, 2017, 09:53:06 AM »
Ah yes, ok.. And I guess I will have less aliasing when the polyphonique is reduced..
OK. . Thanx Xavier..
 Bonne journée. .
PreenFM2 / Re: Feature request?
« Last post by Xavier on May 16, 2017, 09:37:33 AM »

Nice to read you enjoy your preenfm2  :)
I never know how to answer to question that begins by "is it possible"....
Do you ask (1) if it's possible, (2) if it's easy to do, or (3) if i would plan to do it ?

1 - Yes it's possible, the firmware is open source.
The midi to audio conversion is done here :
So you have to modify the code to introduce a delay at this point. Requires a little research to do that.
Then the timers for each instrument must be added somewhere in the settings.
2 - Not very easy
3 - No. It will add some complexity in the menus and settings that is not worth it to my opinion.

Possible Alternative : for the instrument you want to introduce a delay
. Set all mix* params to 0.00
. Set a matrix row like this : env2 1.0 mix*
. Then select the modulation : "Free Env 2" like this : "<D> 0.00 5.0 No"
Where <D> is the delay before your sound will begin.

Pseudo delay effect : can be done by
. using one LFO to pan the sound in the matrix (lfo1 1.0 pan*)
. And the gate target matrix (with an other LFO twice faster) to make the sound hearable only when right or left.

PreenFM2 / Re: Output volume vs polyphony..
« Last post by Xavier on May 16, 2017, 09:18:44 AM »

This is how it works.
The voice mixer is 100% digital.

So it maximizes the number of actual bits for each used voice.
Same thing : instrument not used should have their number of voice set to 0 so that it does not take any room in the digital mixer.

Summary : for best resolution, only set the number of voices you really need for each instrument.
PreenFM2 / Feature request?
« Last post by Warmachine on May 16, 2017, 09:10:19 AM »
I'very had the preenfm2 for a little over a year and am quite pleased with it, especially the 4 part multitimbrality. I'm wondering if it would be possible to the time ( in milliseconds ) that it takes for each instrument to play after each key press. If all 4 instruments on the same midi channel were using the same patch, then it could have a pseudo delay effect.
PreenFM2 / Output volume vs polyphony..
« Last post by opus.quatre on May 15, 2017, 05:51:44 PM »
Hello there..
Is it normal if I get a big difference in output volume, when I turn the polyphony "knob" ??
On my preenfm2, the output volume is decreasing, as long as I increase the polyphony, and vice versa.. Is it the normal behaviour ? Or is it just on mine ?

And still.. Enjoy your sun..
PreenFM2 / Re: A higher polyphony ??
« Last post by opus.quatre on May 15, 2017, 12:24:54 PM »
No worry Xavier..
I understand..
Have a nice day..
PreenFM2 / Re: Can't save to usb
« Last post by Xavier on May 15, 2017, 10:48:59 AM »
Thanks for the details (i've modified your subjet).
Sounds like a bug.
Don't know if it's easily fixable as the USB library is the one from STM (the MCU manufacturer).
PreenFM2 / Re: A higher polyphony ??
« Last post by Xavier on May 15, 2017, 10:30:52 AM »

What you describe is of course possible, but it's a LOT of work.
No i won't work on that  ;)

You can chain 2 preenfm2. But they'll have to play different instrument.
Polyphony on one instrument cannot be expanded.

PreenFM2 / Re: Z-plane/Morph filter
« Last post by alien_brain on May 14, 2017, 10:37:29 PM »
yep, a 4 part vector fade could be realized with the right matrix settings and a decent controller joystick setup.  as theorized a while back.  this would include all capabilities of the voice  so you could fade between voices with differing filter types implemented.  just a simple crossfade however, not a strict morph.  but still...  on an fm synth?  sounds awesome!
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