Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - Xavier

Pages: [1] 2 3 ... 90
PreenFM2 / Re: Slower LFO
« on: February 20, 2019, 09:02:38 PM »
Oh thanks! You are right, i'm programming sounds on the editor and I didn't checked on the unit screen. 100 seconds is great.
Is there a technical reason that the editor can't produce and send double decimal values for this particular setting?

No reason.
A programmer error  ;)

PreenFM2 / Re: Slower LFO
« on: February 20, 2019, 03:49:51 PM »
OK i got what you meant.
The limit is the PC/mac editor display.
You can change the value on your preen directly, or click on the field in the PC/mac editor and enter 0,01. Even if the editor shows "0.0" it should work.

PreenFM2 / Re: Slower LFO
« on: February 17, 2019, 05:26:50 PM »


Not sure why you say slowest LFO is 0.1Hz.
Actually it's 0.01 which is a 100 seconds period.
Did i correctly understand your question ?


PreenFM2 / Re: Preen doesn´t start - display is black
« on: February 16, 2019, 06:06:40 PM »
Thanks Maria, but these are very low resolution pictures it's not possible to see potential solder problems.

You should start by checking all your solder points.
Start by all the preenf405 and the display header.

Then have a look at the attached picture and with a multimetre check all colored points.
5V and 3.3v are all required.
2.5v is the DAC output and should not prevent the display to work.


PreenFM2 / Re: Preen doesn´t start - display is black
« on: February 13, 2019, 09:46:33 PM »
What do you see exactly about the USB. The USB key light ?
Can you see the content from the your PC ? That's weird, the preenfm should boot in midi device mode.

Plug the audio, and le me know if you hear a "pop" when you plug your preen.
You can also try to press and hold "INST" and then pree one of the 5 left buttons. You should hear a note.
If not then the problem is not the display.

You can read this thread :
And verify the different points shown of message #6.

That would help also if you can post a better quality pictures of your PCB.

PreenFM2 / Re: Preen doesn´t start - display is black
« on: February 13, 2019, 10:35:22 AM »

Is it the metal case from Van Daal Electronics ?
So your Display is an OLED one ?
If yes, the "OLED" resistor should be populated with a 22ohm resistor.


PreenFM2 / Re: arp mode change by CC
« on: February 10, 2019, 03:58:32 PM »
Thanks for the info.
Seems like the midi doc was out of date.

I moved the arpegiator CC from 97+ to 100+ to avoid conflict with NRPN in 2.08.
I just updated the doc :

Let me know if it works,

PreenFM2 / Re: reversed encoders problem
« on: February 03, 2019, 06:59:33 PM »
Yes, the problem is that the driver is changed as soon as it shows up in the menu.
So with some "24i" encoder type, it's possible that some settings cannot be reached when coming from 12.
You could try to turn very very slowly the encoder, should change at half step.

Anyway, modifyting directly settings.txt sounds like a very good solution  as you have to do that only once :)

PreenFM2 / Re: reversed encoders problem
« on: January 27, 2019, 09:57:59 AM »

It's a simple change ;) I wanted to add that for a long time.
I've pushed the change list in a new branch.

Firmware 2.09a is attached.

Go in the encoders menu : Tools > Set > Rot. Enc.
Then you have 2 new encoders 12i and 24i which are inversed version of 12 and 24.

There's a trap, as soon as you select one of the "i" encoders, the encoders are inversed. So to go from 12i to 24i turn the other way.
Reminder : once you have the encoder you want. Press MENU twice to save.


PreenFM2 / Re: Trigger <randomize> with midi cc# ???
« 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: Volume mixer
« 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: resisitor network orientation?
« on: January 08, 2019, 10:57:33 AM »

With a LCD display you need the RV1 (variable resistor) to adjust the LCD contrast. Without it you have a black screen.
Do you see some backlight on the LCD when you switch on ?

You also need a USB key with the "pfm2/" folder on it. Else you'll have only white square on the LCD.
Without USB you can press a button while switching on and you'll enter bootloader mode, which will allow you to check the LCD.

In French / Re: ecran noir
« on: January 07, 2019, 10:00:07 PM »
Merci pour les dernières infos.
Tout fonctionne... bonne nouvelle !   :)

PreenFM2 / Re: resisitor network orientation?
« on: January 07, 2019, 01:39:34 PM »

That's a lot of information.
The 2.5v is the output of the DAC, so if not here it means the preenf405=>mcp4922 communication is not OK.

The 4 leds are connected in series to the same pin so it's weird one of them does not work. Polarity ?

Can you post a detailed good quality picture of your PCB, that would help.

Do you use an OLED or a LCD display ?
Double check the 68ohm LCD resitor if you use a LCD.
Double check the OLED resistor (22ohm if OLED and direct junction if LCD).

Do you hear a "pop" in the audio when you switch on the preenfm2.

PreenFM2 / Re: resisitor network orientation?
« on: January 04, 2019, 11:24:20 AM »
I just wanted to confirm that the square through hole is indeed the ground pin/common terminal for the network

OK i see. Yes it is !

You can easily check with a multimetre how your network is built.
10 K ohm between the common pin and any other one.
20 K ohm between any of other pins.

Pages: [1] 2 3 ... 90