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Topics - randy

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PreenFM1 (the blue one) / Using the sustain pedal
« on: November 29, 2013, 04:03:13 AM »
Can someone tell me how to tell the PreenFM to respond to a sustain pedal (or hold switch)?  Couldn't find it in the manual but maybe I didn't look hard enough.



Not sure how many people here are also Shruthi alumni but there has been an ongoing discussion on the MI forum regarding Xavier's great little PreenFM synth.  The last reply from Xavier was:


What a big thread… there’s more discussion here about the Preen than on its own forum ;-)

I don’t have any secrets, so here is the status.
I stopped packaging PreenFM kits because it takes me too much time beside my 3 kids and my full time job.
I shipped around 90 kits and 30 PCBs and am very happy that most people like it and find it usefull.

I don’t have anymore PCB and i’m not sure it’s worth it to order an other batch… Have to order many to have a decent price.
But anyone can do it.. gerber files are online.
You can also take the Kicad source and improve the routing.

But right, like many of you i’m DIY addicted, i cannot stop and I’m working slowly on a PreenFM mk2…
Don’t expect anything before mid 2013. I said slowly ;-)
I’m using a new board (cortex-m4 based) and don’t use any more the libmaple library… so that’s a lot of work.

Please if you have any questions, you can do it on

Thanks for the interest,



When I originally started the thread, I was looking for some opinions on the PreenFM from the MI bunch, and the thread has morphed into all sorts of technical discussions.  I have since bought a PreenFM kit and have been using it for the past month or so, it's great!  So, I figured I'd try and get the discussion moving over here.


PreenFM1 (the blue one) / Tonight's the night
« on: September 11, 2012, 04:02:22 PM »
Finished building my PreenFM last night (Sept 10th) and hoping to test it tonight.  It really is an easy build, although perhaps I shouldn't mention that until after I see if it works!

A little while ago there was a thread on the Mutable Instruments forum discussing first builds for someone who is new at DIY electronics.  The idea was to find something not too expensive, easy to build and useful.  The Shruthi, while not overly difficult, is a bit much for a first build.  I think, with some adjustments to the online build instructions, the PreenFM could be done by a newcomer.

Hopefully I can report back later today.


PreenFM1 (the blue one) / Back in stock!
« on: August 27, 2012, 06:51:24 PM »
I just ordered my first PreenFM!  Went for the new "Crystal" version, looking forward to building and hearing this.  Should go well with my two (so far) Shruthis.  Ambika is next.


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