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81
preenfm2 and preenfm3 / Re: more matrix sources
« Last post by maki on January 17, 2024, 07:50:56 PM »
Toltekradiation, please make a Preenfm2 a useful MIDI processor by adding a "MIDI dispatcher" to the Preenfm2 matrix. A MIDI dispatcher routes every new MIDI note and related messages from MIDI IN to a new channel through MIDI OUT, by sending only one note to one channel. This allows us to play a set of monophonic synths as one poly-synth. Thank you.
82
preenfm2 and preenfm3 / Re: tuning
« Last post by Iapetus on December 27, 2023, 12:47:06 AM »
Hi
thanks for mentioning the pfm2 manual. I'd sort of forgotten about that.  ::)
Hello,
as i understand your question, i would add that in the pfm3, there is a scala mapping option (scala page 2)
where one can select the kind of mapping : continuous to keyboard

it is explained in the pfm 2 manual :
https://ixox.fr/preenfm2/preenfm/menu-mode/

Quote
The last option Map is set to Keyboard by default. In this mode, it will always make a C starting each scale. This is relevant for scales with number of notes different from 12. The keyboard mode makes scales easier to play on… keyboard.
‘Continuous’ option will start each next scale right after the previous one is finished, which make it harder to play on keyboard, but can be usefull with other kind of midi controller.
83
preenfm2 and preenfm3 / Re: tuning
« Last post by Iapetus on December 27, 2023, 12:43:46 AM »
Apologies Xavier for taking this long to acknowledge your reply. At least for my current needs I can work well with the Scala database - it has my area of interest well covered. In some ways my question may have been more me thinking speculatively about possibilities when I can already currently achieve what I want. That is something! - the Preen is just LOADED -

Hi,

The micro tonality can only be achieved through Scala files.
You can write your own scale and import them into your preenfm3.
So the limits are the scala file limit:
https://www.huygens-fokker.org/scala/scl_format.html

You can still change the default frequency values here (128 values for midi note from 0 to 127) :
https://github.com/Ixox/preenfm3/blob/master/firmware/Src/synth/waves.c#L1
And recompile the firmware.

Xavier
84
preenfm2 and preenfm3 / Re: Vosim & al.
« Last post by Toltekradiation on December 16, 2023, 06:28:56 PM »
Another version :
Algo29 is reworked as it was too close to algo31 : it's now a 4 osc, with two carrier, a classic one and a synced one.
Matrix modulation is now squared for synced oscillators : sounds more natural and possibly more extreme !

85
preenfm2 and preenfm3 / Re: Vosim & al.
« Last post by matrix12x on December 05, 2023, 04:09:46 AM »
re the additional modulation, thanks. Very cool. I just started playing with the new algorithm.
86
preenfm2 and preenfm3 / Re: Vosim & al.
« Last post by Toltekradiation on December 02, 2023, 08:17:52 PM »
Here is a new version, with another algo, which let the master sync osc to be modulated.

And i found a trick to get a much larger pitch range modulation for the slaved osc, pitch modulation from the matrix is now x 16 for those.
It helps to get the fake resonance like heard in the supercollider thread above :D

87
preenfm2 and preenfm3 / Re: filtering USB +5V line
« Last post by Toltekradiation on November 22, 2023, 08:07:47 PM »
oh yes, i read your post a bit in hurry :-X

yes it's worth testing : just a few components :D

88
preenfm2 and preenfm3 / Re: filtering USB +5V line
« Last post by matrix12x on November 22, 2023, 07:59:48 PM »
Thanks. I put one external ferrite on all of my USB cables, but that's generally just good for EMI/RFI. This is much lower freq than that since its in the audio range.

The circuit I showed above I can build super cheap and the ferrite is not the bolt around a cable type, it's the thruhole (or smt) type.

I was thinking of trying one if the audio isolators you linked to.
89
preenfm2 and preenfm3 / Re: filtering USB +5V line
« Last post by Toltekradiation on November 22, 2023, 07:54:47 AM »
Hi,

i used ferrite on some diy modular, i think it's good to lower EMI noise a bit, but i don't think it would be enough to clean usb power, which can be very noisy..

There is also this kind of solution for this :
https://www.audiophonics.fr/en/interface-modules/usb-20-isolator-12mbps-1x-usb-a-to-4x-usb-a-module-p-17895.html

i tried cheap chinese usb isolator, it was real junk,
the audiophonics may work, i have not tested it but it's a reliable website in my opinion.
There is other usb isolators around, but not cheap...

90
preenfm2 and preenfm3 / filtering USB +5V line
« Last post by matrix12x on November 22, 2023, 01:10:34 AM »
Has anyone modded their Preen FM3 to add something like:

https://andybrown.me.uk/2015/07/24/usb-filtering/

Its a ferrite and some caps.

My PFM3 gets kind of noisy on USB power. Which I can work around with the DC connector and removing the USB DC jumpers. But, its just so darn convenient to use USB to power sometimes.
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