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PreenFM2 / Re: Trigger <randomize> with midi cc# ???
« Last post by Xavier on January 18, 2019, 10:15:23 PM »

Not sure what you try to do.
Triggering a new random value when one midi CC# change ?
No that's not possible.
You can use some CC (1, 2, 115, 116, 117, 118) to control a matrix multiplier where the source is a LFO with a random shape.
I think that would be the closer solution.
PreenFM2 / Re: PreenFM Eurorack module
« Last post by served on January 17, 2019, 09:03:30 AM »
Time schedule:

1) Stock of Assembled Eurorack modules: End of January/Beginning of February
2) Eurorack DIY Full kit and assembly instructions: Around April.
3) DIY kit to build your PreenFM into Eurorack version: Later around April.
4) Semimodular tabletop PreenFM: Around summer period.

Lets hope it all goes faster actually. But thouse times are reachable.
PreenFM2 / Trigger <randomize> with midi cc# ???
« Last post by JeffS on January 14, 2019, 06:20:55 AM »
Is it possible to trigger the randomize function remotely, using midi cc# ?

I am controlling a lot on the preenfm2 with my Nektar midi keyboard, but would love to be able to trigger "randomize" as well.

Thank you.

PreenFM2 / Re: PreenFM Eurorack module
« Last post by served on January 13, 2019, 05:40:35 PM »
First video uploaded.

Cool!!! :D When will it be available for order?

Few weeks to go! I will post when they are in stock.
PreenFM2 / Re: resisitor network orientation?
« Last post by benjaminr on January 13, 2019, 12:23:00 AM »
Turns out im an idiot and wired my buttons sideways, so the Preen thought they were always being pressed, hence bootloader mode!
Flipped them around and it's running great!! Thanks Xavier for all your help, very happy playing with it so far, excited to start programming voices and really lean into it!!
PreenFM2 / Re: Volume mixer
« Last post by Xavier on January 12, 2019, 11:37:56 AM »
Yes it's currently map on CC73.
I can include that in next release that makes sens.

In the meantime a hack is super easy if you can compile the firmware :

Code: [Select]
        case 7:just above or just bellow
Code: [Select]
        case CC_FILTER_GAIN:
Here :
Sending CC7 from 0 to 127 will set the gain from 0 to 1.27 in the filter gain parameter.

Keep in mind that's digital mixing so lower volume means lower bits resolution.

PreenFM2 / Re: Volume mixer
« Last post by sub_set on January 11, 2019, 10:25:53 PM »
Sorry for bringing this older thread back, but I think it is related to a feature request I would like to make.

Xavier, is there a possibility of implementing the MIDI CC7 volume control standard?

I run a Cirklon which allows me to set volume levels for any attached gear that recognizes the CC7 standard, using the Cirklon as a virtual mixer with some automation abilities.
PreenFM2 / Re: PreenFM Eurorack module
« Last post by Fizmo on January 11, 2019, 06:11:03 PM »
First video uploaded.

Cool!!! :D When will it be available for order?
PreenFM2 / Re: Yellow OLED : high frequency solution
« Last post by served on January 11, 2019, 07:04:04 AM »
Good points! I will check that resistor!

Butw it would be interesting to know what inductor is on the Blue screen.
I could not find it anywhere. Not even similar one.

If you need inductor for the other colours read this thread:
PreenFM2 / Re: Yellow OLED : high frequency solution
« Last post by kreeper_6 on January 11, 2019, 03:17:52 AM »
I can confirm that Blue OLED screen from Newheaven does work. No whining noise.
But it has issues with the pixcels brightness and it sometimes skips as the signal level is probably on the low limit.

Do you have a resistor in the OLED position? At first I had some pixel brightness differences across the display until I pulled the resistor and put in a wire jumper.


I can confirm that the whining noise that you can hear from the screen or in the audio path is due to the Inductor type.
I have swapped the Bluse screen inductor to a different type and it started to make loud audiable noise.
Same test in the Yellow screen. And the symptoms are the same.

Keep your eye on the heat when using different colours. Blue screen for example draws a lot more current than the Yellow one. So your voltage regulators will go a lot hotter.

I have marked down some shielded inductors for order to test on a Newhaven Green NHD-0420DZW-AG5 that has the noise problem @ 13.8k; It has a different component configuration to the Blue display. I had ordered a blue Vishay Blue O020N004ABPP5N0000 but the display has some character line issue, the board is exactly the same as the newhaven including the components so I'm not sure if it could be the controller or possibly just defect. I may order a different color Vishay to test again; It does not suffer from the noise issue as it has what I assume is a shielded inductor that is the same as on the newhaven Blue.

I'll take note on the heat of the regulator and maybe swap it out for a switching regulator.

Newhaven Green NHD-0420DZW-AG5

Vishay Blue O020N004ABPP5N0000

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