Messages

1

PreenFM2 / Re: PreenFM Eurorack module

« on: December 02, 2019, 09:48:03 AM »

"CV gate" is the threshold that triggers a new sound.
The lower it is the more sensitive it is.
If the Gate the preenfm receives is lower than this threshold then no sound is triggered.
Try to turn it down while you send some CV Gates.

2

PreenFM2 / Re: start phase of an operator

« on: December 01, 2019, 06:28:27 PM »

Still a bit confusing 
But if what you're after is to modulate the starting phase of operator wave, you won't have that.
Modifying the pitch/frequency of each operator can be done in the matrix. But i think you know that

3

PreenFM2 / Re: operator feedback

« on: December 01, 2019, 05:59:12 PM »

The pitch shifting could be avoided with a High pass filter. As it's already implemented when 3 or more operators are in cascade.

Yes, that would be interesting to add new ALGO with some feedback capability.
ALGO1 is here, if anyone want to modify some wirings :
https://github.com/Ixox/preenfm2/blob/master/src/synth/Voice.cpp?ts=4#L314
Line 350 is the HP filter for OP2.

4

PreenFM2 / Re: PreenFM Eurorack module

« on: December 01, 2019, 05:35:47 PM »

Hi,
It's hard to reply without knowing more what you're doing.
Have you tried turning down the CV Gate in "MENU>Tools>Set>CV GATE %" ?

5

PreenFM2 / Re: start phase of an operator

« on: December 01, 2019, 05:33:04 PM »

The starting phase of operators cannot be modulated.
It is set to a quarter of the period, so that it starts when the sinusoid  value is 1, to allow faster attack.
See the '* 0.25' here
https://github.com/Ixox/preenfm2/blob/master/src/synth/Osc.cpp?ts=4#L178

I don't understand your second sentence.

6

PreenFM2 / Re: PreenFM2 Port to Baremetal RaspberryPi 3B

« on: November 24, 2019, 11:39:32 AM »

I assume the audio main loop is single-threaded. No ?
Would be great to use the 4 cores of the RPI3 

7

PreenFM2 / Re: PreenFM2 Port to Baremetal RaspberryPi 3B

« on: November 24, 2019, 11:34:17 AM »

 
WOW !!!
I started some time ago to port it to a RPI3 but under linux + Real time kernel. I never finished it
Baremetal is much better !!!!
That's a very nice project !

So you have any info about the kind of performance you get ?
EDITED : i read the github README That answer this question.

8

PreenFM2 / Re: RANDOMIZER

« on: November 23, 2019, 04:40:33 PM »

The five button triggers a new random. There's no difference between the 5.
You have a little more info in the doc here in the "1-Load" part.
http://ixox.fr/preenfm2/manual/menu-mode/

It's real randomization.
But keep in mind you can keep some part of the sound you have : "Keep" option for the area you don't want to modify.

9

PreenFM2 / Re: Preenfm2 with Roli Seaboard

« on: November 23, 2019, 11:16:46 AM »

Not really. At least not from me.
That would require some research and development time that i currently don't really have.

10

PreenFM2 / Re: OUT OF TUNE? PLEASE HELP

« on: November 23, 2019, 11:14:20 AM »

Thanks for taking the time to answer to all questions
That helps to eliminate some bug possibility.

Seems to be linked to DX7 import code + voice allocation + possibilty some midi info the Keystep sends that the preenfm2 does not like....

At least you have a Workaround when that occures.

11

PreenFM2 / Re: OUT OF TUNE? PLEASE HELP

« on: November 22, 2019, 09:18:22 AM »

OK you're right. There is something wrong...

Seems like it's not random at all and that you reproduce each time you switch from 3 to 6 voices for this patch, no ?
If you want me to give a try I really need this patch. Can you save it in your default preset and share DEFAULT.CMB. You can access it from the PC without opening the preenfm2. See (1) here : http://ixox.fr/preenfm2/manual/upgrade-firmware/

I have no idea what's going on, so i have some questions to try to understand.
1. Is if a filter (LP, HP ?) activated ?
2. Is tools>Set>Midi thru on or off ?
3. Does it only happen with preset from DX7 sysex ? or with regular preenfm2 preset ?
4. When out of tune. If you press 6 keys at the same time. Does it have the same result as INST+MENU ?
5. Is Tools>Scala>Enable ?
And a last one :
6. Is the problem still here if you set Tools>Set>Receives to NONE ?

12

PreenFM2 / Re: OUT OF TUNE? PLEASE HELP

« on: November 21, 2019, 09:58:56 PM »

Video one shows me hitting a "A" note but it registers as D on my tuner? Doesn't make sense, shouldn't be doing that. The fix is the same inst+menu pops it back into tune or if I lower the "voic" parameter to 3 or less it will go back into tune.
https://drive.google.com/open?id=17CLYCegEY5enIBVKCPTeQQND9UobGQSn

Everthing is fine in this video except your tuner 
The note is clearly a A compare to G and F you also play, and your tuner display a D.
As Matrix12x said, it must be some inharmonic frequency, that are strong in this sound and confuse your tuner.

Video two shows the thing going out of tune when "voic" is set higher than 3 and shouldn't be doing that, but in the video as you can see I lower it back to 3 "voic" and it goes back into tune. The fix is the same inst+menu pops it back into tune or if I lower the "voic" parameter to 3 or less it will go back into tune.

https://drive.google.com/open?id=1J-MD8c6SYj1dHvzbIpkMn5xSxliYehFv

The weird thing is out of all this, the out of tune notes jump. Run across a patch and it may be the "A" note out, then play it a little then all of a sudden the "F" note goes out instead and the "A" note is back in tune. And it's random patches, you never know if it's gonna happen until you play it.

So as you can see I'm not going crazy and this is a real concern. 

I think it sounds out of tune because 6 inharmonic notes with long release are sounding at the same time.
Reducing the number of notes make the overall sound clearer and sound more in tune.

For me it's the operators settings that make it sound like this.
You use ALG1, set all 3 operator waveform to Sin.
Ftype: Keyb
Freq : 1.0 or 2.0 (like you want for each)
Ftune : 0.0
That will make a very clean FM sound.

The more complex and inharmonic the preset is, the weirder it will sound specially when you play several note at the same time.

13

PreenFM2 / Re: OUT OF TUNE? PLEASE HELP

« on: November 21, 2019, 11:54:27 AM »

It's very easy to have a FM digital synth  play out of tune, just change a little the frequency or 'fine tune' of the carrier operators.

So i assume the Sysex import translator has a problem.
This is the first time i hear about this, that's why i think it may be linked to the instrument listening all to the same midi channel and the number of voice of the different instruments.

14

PreenFM2 / Re: OUT OF TUNE? PLEASE HELP

« on: November 20, 2019, 09:54:18 PM »

So all instrument listen to the same midi channel ?

Can you set a dedicated midi channel for each instrument on the preenfm2 and have your KeyStep send to only one instrument ? Does that fix the problem ?

15

PreenFM2 / Re: OUT OF TUNE? PLEASE HELP

« on: November 20, 2019, 09:27:51 PM »

That's really weird.

"1234" shows up ? at the same time ?
You should try to set" Tool>Set>Global ch: None"

You can use INST+MENU on the preenfm3 to reset the voice alocation. Does that fix the problem whe it appears ?