KVR Audio

Ixox · Post by **Ixox** » Mon May 09, 2011 10:53 am

Hi,

I just created a site for a project i'm working on :
http://www.preenfm.net

It's not yet finished neither available as a kit.

But I'm interested by all remarks...

If you have FM knowledge and have favorite FM algos please let me know.
The list of available algos is on the site, and adding FM algorithms is very easy at this point.

Advice, questions, remarks ?

Thanks,

Xavier

tommy_d · Post by **tommy_d** » Mon May 09, 2011 3:31 pm

Very interesting - looks like a really cool project!

I'd love to hear it in action but I couldn't get the sound clips to play

(FireFox v3.6.17, Windows ExPee)

Ixox · Post by **Ixox** » Mon May 09, 2011 9:08 pm

Thanks.
I've just added direct links to mp3s.

Xavier

justin3am · Post by **justin3am** » Mon May 09, 2011 9:31 pm

Very cool. I'll check out the demos when I get home from work.

tommy_d · Post by **tommy_d** » Mon May 09, 2011 9:58 pm

Ixox wrote:Thanks.
I've just added direct links to mp3s.

Xavier

Thank you. And nice bass sound!

Ixox · Post by **Ixox** » Wed May 11, 2011 8:47 pm

Thanks.

I'll try to post a video soon...
Controling this little box with TouchOSC on a IPad is very cool...

Xavier

Hink · Post by **Hink** » Wed May 11, 2011 8:50 pm

thanx Ixox, looking good

Ixox · Post by **Ixox** » Tue Aug 23, 2011 5:54 am

Hello,

Many updates on my project

The web site now has much more content :
http://preenfm.net

A all new facebook page... Created 1 houre ago... Of course don't hesitate to "like"... That will help

http://www.facebook.com/pages/PreenFM/212040125516094

A quickly done demo with a bass that has a strange sound in this MP3 :
http://xhosxe.free.fr/PreenFM/PreenFM_1.mp3
Of course all sounds are directly from the sound module without any other effects (except a bit of stereo panning).

All the features i wanted are coded and work fine. The PCB is ready.
The box still need some work.

Let me know what you think,
It's a small project i expect to make around 30 kits but all remarks are welcome,

Thanks,

Xavier

skitchy · Post by **skitchy** » Sat Aug 27, 2011 12:30 am

That appears to be a Maple mini as the brain of your synth.
What are the features/advantages of the Maple board that made you choose it over the competition?

Ixox · Post by **Ixox** » Sat Aug 27, 2011 5:10 pm

skitchy wrote:That appears to be a Maple mini as the brain of your synth.
What are the features/advantages of the Maple board that made you choose it over the competition?

Hello,

It depends on the competition you talk about.

Over arduino board ? this one is much much more powerfull...
32bits ARM at 72Mhz is... maybe 100 times more powerfull than a 8bits 16Mhz arduino (32 bits multiplication in 1 clock cycle).

Over other boards with same MCU:
Leaflabs (http://www.leaflabs.com) provides a robust environment with a working GCC chain tool.
I develop in C++ with Eclipse and upload very easily my programm to the board.
They also provides libraries that works pretty well : serial (midi), I2C (eeprom to store patches), LCD...
And they are very helpfull to fix any problem you can have.
All leaflabs code is open source.
Last point, the maple mini perfectly fits in a 40 pins IC socket to plug it into a PCB.

Xavier

Ixox · Post by **Ixox** » Sun Sep 25, 2011 8:53 am

Hello,

I tried 3 difference LCDs and i'd like know which one people like the best.
Let me know what you think on FaceBook or on KVR

See PreenFM LCDs color

Thanks,

Xavier

skitchy · Post by **skitchy** » Tue Sep 27, 2011 11:19 am

No 1 (blue on black) - easiest to read.

mystran · Post by **mystran** » Tue Sep 27, 2011 11:43 am

skitchy wrote:No 1 (blue on black) - easiest to read.

I actually usually like "white on blue" easier to read in dim or dark rooms, but if they are all pin compatible swapping one for another shouldn't be a huge deal (and for a kit you could make it a choice, unless you think stocking all of them would be a pain).

bronxsound · Post by **bronxsound** » Tue Sep 27, 2011 11:45 am

excellent project! i saw your previous ones. this one seems to be more compact. brilliant!
i'll have to look at the board you used (I have arduino)

mystran · Post by **mystran** » Tue Sep 27, 2011 11:53 am

Oh regarding "integer evil for FM" remarks in the FAQ: I'd say FM synthesis is probably one of the few things DSP where I would use integer arithmetic even on a PC. Since in practice you're probably going to be reading your sine-waves from a lookup table, it'd be totally pointless to do calculations in float, only to keep converting them back to integers for lookups (and the CPU waste would be remarkably silly).

Anyway looks kinda interesting.

PreenFM : DIY Frequency Modulation Synth