Recent Posts

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21
PreenFM2 / Re: midi out not working (solved)
« Last post by Toltekradiation on June 18, 2018, 09:50:30 AM »
Yes, exactly, the resistor i modified is the closest to the ld1117.
22
PreenFM2 / Re: Problem starting PreenFM2
« Last post by loluser22 on June 18, 2018, 12:45:17 AM »
....I cannot boot normally, I just get the full blocks in the OLED. I have a self-made preen405....

The full blocks in the display are displayed by the firmwre.
It freeze here if the firmware cannot access the USB drive.
2 possiblities : you didn't t have the expected "/pfm2/" folder or your USB stick is not readable by the preenfm2.

Xavier
Great! I've been reflowing the STM32F405 chip all night. Sight, at least is seems I didn't break it, cause I still have the blocks!

But great, my stick is 256MB, an old fellow! Ill try a couple others to see if that fixes the issue! Thanks!
23
PreenFM2 / Re: Problem starting PreenFM2
« Last post by Xavier on June 17, 2018, 10:46:00 AM »
....I cannot boot normally, I just get the full blocks in the OLED. I have a self-made preen405....

The full blocks in the display are displayed by the firmwre.
It freeze here if the firmware cannot access the USB drive.
2 possiblities : you didn't t have the expected "/pfm2/" folder or your USB stick is not readable by the preenfm2.

Xavier
24
PreenFM2 / Re: Problem starting PreenFM2
« Last post by loluser22 on June 16, 2018, 11:43:47 PM »
I got it up and running after I removed and reseated the Preenf405 chip.  For some reason, it was showing the bootloader showing that it was connected but it would not boot until I reseated and soldered the chip in place. 

I do have an issue with the screen display.  Between lines two and line three there are lines above the characters.  Is this normal or do I possibly have a bad screen/ connection with the screen?
I'm having the exact issue you describe, I can get the bootloader running and boot into the bootloader mode, but I cannot boot normally, I just get the full blocks in the OLED. I have a self-made preen405.

I removed the preen405 and put it back in, but it did not help. Did you say that you soldered in place in stead of using the socket?
25
PreenFM2 / Re: midi out not working (solved)
« Last post by Megalomidiac on June 16, 2018, 06:02:50 PM »
What a coincidence, I have the problem, too with my teensy midi controller.
Will try this, thank you!

If you look at here: http://ixox.fr/preenfm2/build-it/dsc00782/#main which 220 is it from the 3 on the right side, the first I think?
26
PreenFM2 / 30 years of Digital FM Preservation Video festuring the Preen FM2
« Last post by element-s on June 15, 2018, 05:30:54 PM »
This might be of interest if you work with many differnt F.M. synths.

This video tests how F.M. synthesis data from a 1985 machine is preserved, by step conversion, across 3 decades, from one machine to another as new technologies arrived. How well did it work?

https://youtu.be/6nph6pDZErE

27
PreenFM2 / Re: Octatrack and Preen Combo Change
« Last post by lokki on June 05, 2018, 01:04:50 AM »
and i have still not uploaded my latest firmware source to GitHub... will try to do that soon.
28
PreenFM2 / Re: Octatrack and Preen Combo Change
« Last post by Xavier on June 04, 2018, 11:36:07 AM »

Hi,

I think it's not very clear from the doc.
You first select the bank once.
Then, use program changes to trigger a preset load from the selected bank.

Chosing the bank is done through regular CC.
If you want the first bank of combo :
Send 1 to CC#0 (Combo)
Send 0 to CC#32 (Combo bank number).

Then sending program change will load combo from the first bank of your combo bank.

But i  have no idea how to send that from the octatrack.
And i still haven't looked at what Lokki did exactly for program change, so i cannot comment  ;)

Xavier
29
PreenFM2 / Re: Octatrack and Preen Combo Change
« Last post by lokki on June 04, 2018, 12:08:52 AM »
maybe not the answer you are looking for, but i have made a custom extended firmware, where you can choose in the global menu what incoming program messages should do, change banks/combos etc. maybe that would be an option? you find it in the custom extended firmware thread...
30
PreenFM2 / Re: midi out not working (solved)
« Last post by Xavier on June 03, 2018, 09:13:55 PM »

Interesting, thanks for the feedback.
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