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Messages - Xavier

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PreenFM2 / Re: Manual in PDF format
« on: March 12, 2018, 10:03:16 AM »
 Yes this is super usefull thanks....  :)

PreenFM2 / Re: Where Can I Get a PreenFM2?
« on: March 07, 2018, 07:20:35 AM »
There is no "production" of preenfm2.
It's a DIY project, which means it must be soldered by hand after you buy the other components.
See :

Van Daal Electronics and TubeOhm can do it for you.
I just shipped both of them some PCB and CPU board so they should have full kits/prebuilt unit soon.


PreenFM2 / Re: Flashing bootloader
« on: March 04, 2018, 08:23:18 PM »
Weird... I never had this problem.
Did you solder the preenf405 yourself or is it a genuine one ?

PreenFM2 / Re: Flashing bootloader
« on: March 04, 2018, 06:09:35 PM »

dfu-util message are never very clear.
So it stops immediatly at 0% ?

PreenFM2 / Re: preenfm2 editor 2.08.4 (November 25th 2017)
« on: March 03, 2018, 08:25:50 AM »

Thanks for the reports.

I don't think i'll work on renoise compatibility, but it's good to know it AU does not work with it.

PreenFM2 / Re: Online DX7 / Volca FM patch editor
« on: March 03, 2018, 08:19:41 AM »
If it saves as a DX7 sysex file that the preenfm2 can read, it could work.
But even if it's work that won't be direct editing on the internal preenfm2 parameters, that will be a rough aproximation dont by the preen.

I would suggest you to use the dedicated editor for the preenfm2 :

PreenFM2 / Re: Volume mixer
« on: March 03, 2018, 08:16:25 AM »

Did any try to use the performance page for that ?

In the matrix of each instrument you can try :
p1 -> 1.0 -> Mix*
p2 -> 1.0 -> Pan*

So when in the performance page, (part 5 here ) you can navigate through instrumuent by presing INST button and you always have the encoder 1 for the volume and encoder 2 for the pan.



You should ask Van Daal Electronics as i don't know exactly the reference.
But i assume that's good :)

This is the audio filter part, so you cannot break anything if that's wrong.

PreenFM2 / Re: priority bits
« on: February 02, 2018, 08:21:53 AM »

In the current design, the only important priority is the interuption that feeds the DAC from what i remember.

PreenFM2 / Re: LCD display connector
« on: February 02, 2018, 08:19:55 AM »
Have a look at the bom and at the LCD case in the github folder :

They all work fine together.

PreenFM2 / Re: How to create txt user waveform
« on: January 30, 2018, 10:37:22 PM »

As you must only keep 1 wave cycle, the pitch does not matter.

Yes the preenfm read the txt file and normalized the values.


Yes, all small caps can be soldered in both direction.
But watch the electrolytic caps minus pins !

Be carefull with the direction of resisor network (back 9 pins components), they're very difficul to remove once soldered.

Good luck  :)

PreenFM2 / Re: PreenFM2 r5d - midi DIN IN ok OUT not
« on: January 30, 2018, 09:04:00 PM »

Nice to read you have the In working.

The easiest way to try midi is to use the editor.
Read the small text here :
Binaries are here :

Modify editor should modify preenfm values : you test preenfm midi In.
Change preenfm2 value  and that should change editor value : you test midi Out.


PreenFM2 / Re: PreenFM2 r5d - new build midi not working
« on: January 28, 2018, 07:08:39 PM »


There are 2 things we don't see well on your picture :
. How the midi jack are solders.
. The direction of the 6N137

I attached a diagram with the connection you should check.
Same color = linked.

Happy debugging,


PreenFM2 / Re: PreenFM2 SMD version
« on: January 21, 2018, 02:25:26 PM »

Impressive soldering skills !!!  :o
Nice pictures....

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