PreenFM on

In stock: http://shop.preenfm.net

   

 PreenFM is a set of electronic components and C++ files that, 

when put together become a Frequency Modulation sound module.

Can now be controlled from within your favorite sequencer under windows

http://ixox.fr/forum/index.php?topic=221.0

It can sound like this PreenFM Sound Demo

Or like this with the use of its double-steq sequencers

"Just received and built mine, Totally awesome, love the open architecture of the synth, multiple algorithm programs is really nice.

Has a great signal to noise ratio and a very user friendly interface! 

Small enough to carry around, so it's going to be an intense FM sound design weekend!"  

N8bit

Presets-based demo - 1.0x firmware

"All went well and really fast. the resistor sheet saved some time, too.

great project for beginners i think."

loderbast

New firmware - Step sequencer demo

PreenFM firmware 1.51

The PreenFM main features include :

. 9 different FM alogorithms with up to 6 operators

  Each operator includes one oscillator and one ADSR enveloppe

Oscillator : 7 waveforms (4 sin variation + noise + square + sawtooth), 

  linked to keyb freq or fix, fine tune

.  Up to 4 voice polyphony with 3 operators FM algoriyhm

   up to 3 voice polyphony with 4 operators FM algoriyhm 

   and up to 2 with 6 operators FM algoriyhm.

. Glide available when voice set to 1

. 3 standard LFOs (5 waveforms (sin, saw, ramp, square, random), 

frequency in Hz or synced to MidiClock (/16, /8, /4, /2, *1, *2, *4, *4, *8)

ramp up to 4 seconds, reset on new note).

. 1 Env type LFO

. 2 Step sequencers (16 steps) - BPM from 10 to 240 or synced to MidiClock (/4, /2, *1, *2, *4)

. 12 rows modulation matrix - 12 different sources and 30+ destinations

. Gate (kind of) available in matrix destination - step sequencer routable

. 4 banks of 128 user presets

. System exclusive to exchange patches and banks with a computer
. Midi control : 44 control input/output control changes linked to parameters
. Nrpn : input/ouput of all paremeters
. Midi thru allow to insert the PreenFM in a MidiChain.
 PreenFM Midi channel selectable

. Large readable 4x20 LCD

. Friendly surface controle : You always clearly see on the screen what you're currently editing

. Sampling rate : 32768 Hz (Makes integer division faster ;-). Pseudo 11 bits.
    1024 Hz for LFO and modulation matrix

. 6th order butterworth analog filter to convert the 1 bit output into a nice waveform

. Transparent case that allows you to see every day your nice work

"Received the kit and I must say you did a FANTASTIC job laying out the parts, providing clear instructions, and choosing high quality materials for the build. This is a quality job fromtop to bottom! Thank you! I built it last night in two hours."

Ben

PrenFM is open source and open hardware

That means that you can take the source code, modify it, compile it,  and upload it into the flash memory of your PreenFM.

That means that if you want a custom case, take the map schema, change it and order one on Ponoko.

I learnt many things looking at other open DIY project, i hope some people will learn somethings doing or just looking at this one.

If you improve anything, don't forget to share.

Hardware is protected under a Creative Common license, and the code under GPLV3.

  

"I received the synth today in the mail, and just finished it about an hour ago and gotta say, it rocks.  

Good Job man.  I have built quite a few of these DIY synth boxes and this one is definitely one of the best.

Good documentation and overall a great sounding synth."

Nate

Aerodynamic Shape :-)