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Messages - Xavier

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PreenFM1 (the blue one) / Re: One more PFM (midi trouble though)
« on: February 02, 2012, 09:54:21 AM »


I'm glad it works... Congrats  :D
I'll send you a spare side panel tomorrow or saturday. It's part of the support   ;)


PreenFM1 (the blue one) / Re: One more PFM (midi trouble though)
« on: January 31, 2012, 11:36:00 PM »

Hi Felix,

Congrats for you PreenFM it looks Nice  :D

Here are the verification you should do for your midi problem :
(I assume you don't see circle blinking on the LCD when you send midi to the PreenFM).

. In "menu->Conf->midi>Midi Channel" : Check you have 'All'.
. On the attached picture, I've colored all the connections involved in the Midi input.
. Check that all point of the same color are connected.
. When powered, the red color should be at 3.3V, the white one at 0V.
. Check twice you inserted the 6N137 in the right direction
. Be sure the diode is not inversed.

Let me know,


PreenFM1 (the blue one) / Re: MIDI Clock
« on: January 30, 2012, 11:00:45 PM »

Firmware 1.52.B1 has a full midi-thru instead of the old "forward other channels".
I  think it's how it should have always been.
Let me know if it works as you expected.

And thanks for the suggestion   ;)


In French / Re: Allez j'me lance...
« on: January 29, 2012, 10:27:02 PM »
Merci beaucoup...
Il me fait bien plaisir ce premier message en francais :-)

Félicitation pour ce premier montage DIY ! J'espère pour toi que c'est le premier d'une longue série....


PreenFM1 (the blue one) / Re: USB power supply only ?
« on: January 29, 2012, 10:24:26 PM »
Are you talking about this ?

I bought 3 pieces for 10 euros shipping inlcuded... I don't remember which one exactly.

They work very well and improved a lot the ratio signal/noise.


PreenFM1 (the blue one) / Re: MIDI Clock
« on: January 29, 2012, 08:50:45 PM »

Thanks Paul for the good idea,
That shouldn't be complicated to add.

Will be in 1.52.  :D


PreenFM1 (the blue one) / Re: Last minute issue
« on: January 26, 2012, 09:51:55 PM »

Great... i'm glad it works...  :D

To upgrade the firmware you only have to screw off the 2 screws that links the top part to the rest of the box.
That's enough to reach the maple mini usb port.
Should take you 30 seconds ;-)

It should work with OSX (i've nver tried with a Mac but i do it everyday with Linux).
You must have dfu-util installed.

Follow the upgrade procedure but instead of running the *.cmd file,  run directly the command line :
dfu-util -a1 -d 0x1EAF:0x0003 -D PreenFM_R3_v1.51.bin -R


PreenFM1 (the blue one) / Re: Last minute issue
« on: January 26, 2012, 11:03:32 AM »

Hi Nick,

The LCD is OK.
The Maple blinks so it is powered...
Can you hear the boot sound ?

I think you don't have any choice. You have to take off the knobs and remove the top plate, the LCD etc... and check the connections.
On my dev board, i put on and off many times the knobs... It's easier each time ;-)
Take the board firmly just bellow the knob you remove and it should be OK.

Could you check the points i colored in the attached schema ?
When trying again the LCD, no need to rebuild the case, just plug quickly the LCD for verification.
Plug the USB after plugging the LCD else the LCD will miss the first initialization command.

Let me know how it goes,


PreenFM1 (the blue one) / Re: Working on a sheet metal enclosure. :)
« on: January 22, 2012, 11:34:44 PM »

WOW... i want to see that  :D

Great !  :D
Thank you for the fast confirmation... and for having reported this bug.

Now i have to reflash the 45 maple minis that are waiting to be packaged... Aouch...


PreenFM1 (the blue one) / Re: Another Preen FM sucessfully built
« on: January 20, 2012, 09:35:19 AM »

Seems like you can upgrade to 1.51  ;)


Simple Midi clock also broke the audio engine.
It should be fixed in 1.51.B1...

To download here :

How to upgrade :

Please, let me know if it solves anything on your side.
Thanks for your help  :D



OK thanks.
I think i know what happens.

In Ableton Live, can you disable "Midi TimeCode" for the midi output sent to the PreenFM ?

I hadn't realized Midi TimeCode sends information with the SysEx protocol.
The PreenFM Audio engine stops while waiting for the end of SysEx messages which can make these little audio glitches...
I'll confirm that soon. I didn't check with the code yet.


That's bad. I have to fix that.

Loderbast, do you also use ableton live ?
I just tried several midi config with Reaper and i could not reproduce anything like this.

If you have a midi file I could use that would be great ?
Also, i'm currently downloading a Free-30 days live trial version. Maybe the problem will be obvious with live.



Hi, thanks for the feedback.

I'm not sure i get it.
With an external controller (mid keyboard ?) it works.

But with Ableton Live and with your hardware sequener there's a problem ? Right ?
What is the exact problem ? Notes don't stop ? They are cut ? they are played several times ?

Do you replay something you record with a keyboard or do you use a kind of midi algorithm to send the notes ?
I may be wrong, but I suspect the midi notes to arrive too quickly and as PreenFM polyphony is limited, the rendering is not smooth.

I doubt trying with an other firmware will solve anything.

Could you record the midi that makes the note stuterring in a midi file and send it to me ?
I'd like also to hear what you hear ? Could you record it ?


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