Stumbled upon this in the Raspberry PI forums: http://www.raspberrypi.org/forum?mingleforumaction=viewtopic&t=966
DIY PreenFM synth: http://sites.google.com/site/preenfm/
based on ARM cortex-m3: http://leaflabs.com/
Looks like he posted on this site awhile back: http://sites.google.com/site/preenfm/me-myself-i
Decent looking kit…
http://discourse.midibox.org/t/topic/12320
preenFM seems to be using the internal DAC though.
Link does not work for me?
I am stumped, I tried 3 browsers on 2 computers…
Link does not work for me?
Ckeck your browser, works over here.
Ckeck your browser, works over here.
Even tried it on my Android phone.
I just get:
An Error Occurred
Sorry, an error occurred. If you are unsure on how to use a feature, or don’t know why you got this error message, try looking through the help files for more information.
#10342 We could not determine which forum this topic is in.
Even tried it on my Android phone.
Well, mobile browsers have a tendency to be even less cooperative… But the problem is a different one: having another look I found that the link points towards a restricted section of the MIDIbox forum where only users with programmer status have access. It is mainly about a beta version of the nI2S synth running on the STM32 core.
It’s in the Programmers Lounch section, which you probably dont have access to. Sorry about that.
It’s in the Programmers Lounch section, which you probably dont have access to. Sorry about that.
Its ok, maybe someday I will have access if I prove my worth around here… :sorcerer:
Hi,
I’m still coming here from time to time to see how things are moving forward 
I learnt so many things from Thorsten work.
The 24LC512 and 75HC165 wiring of the PreenFM come directly from the midibox.
The audio output do not come from a DAC but from a 1 bit digital output at 72Mhz low pass filtered.
Xavier
Stumbled upon this in the Raspberry PI forums: http://www.raspberrypi.org/forum?mingleforumaction=viewtopic&t=966
DIY PreenFM synth: http://sites.google.com/site/preenfm/
based on ARM cortex-m3: http://leaflabs.com/
Looks like he posted on this site awhile back: http://sites.google.com/site/preenfm/me-myself-i
Decent looking kit…
Ixox: Simply ask TK to get access to the Programmer’s Lounge and you’ll be able to see the thread.
Stumbled upon this in the Raspberry PI forums: http://www.raspberrypi.org/forum?mingleforumaction=viewtopic&t=966
DIY PreenFM synth: http://sites.google.com/site/preenfm/
Really great work!
I like the assembly hacks, very inspirational! 
Best Regards, Thorsten.
I’m a bit late on this one…
But thanks Thorsten, i’m glad if you find something useful inside.
For those who can be interested, lots of new things since 2 months.
It now has 2 step sequencers usable as source in the modulation matrix.
External Midi clock synchronization for the 3 LFOs and 2 step sequencers
Kind of gate on the main output
That allows to get sound like this by just pressing a few key on your keyboard :
http://xhosxe.free.fr/PreenFM/PreenFM_MidiClock.mp3
(Drums are VST Drumaxx).
No assembly in the new feature
Xavier