Messages

1216

preenfm2 and preenfm3 / Re: 3D Printed Case

« on: October 14, 2016, 11:05:28 PM »

OnShape ?
I didn't know this site before.
I would be surprised it can be exported to another 3D printer service.
Anyway having a link to this case when it's OK would be great.

Once you find a DX7 sound you like.
Try to use the randomizer with : Keep / Keep / Keep / Soft. To add a little more movement.
(Part 1 here http://ixox.fr/preenfm2/manual/menu-mode/)

1217

preenfm2 and preenfm3 / Re: 3D Printed Case

« on: October 14, 2016, 09:42:26 AM »

 
WOW !!!!!
Congratulations...
Fantastic video, great music and awesome case.....
Thanks a lot for sharing.

Would you mind sharing the files when you have a V2 ?
That would be a big adition to the preenfm2 project.

1218

preenfm2 and preenfm3 / Re: Custom algorithms

« on: October 14, 2016, 09:37:36 AM »

The DX7 patch loading isn't a direct translation since there is no feedback in the preenfm2.

And because the internal structure and parameters) of the preenfm2 are totally different from the DX7.

The reason, I'm told for the lack of feedback is the main goal of feedback was to get noise or sawtooth like waveforms out of the operator, which we can just do by using a custom waveform.

That's the main idea. And you can even upload your own waveform now.
(It wouldn't be hard to implement, but the problem is that as the CPU is full at full polyphony, so that would require to lower polyphony or sampling rate).
I thought at some point about adding a new algo with 5 operators and a feedback.

What I'm curious about is if it shows feedback, is there a way to convert so the operator in question automatically loads as a noise or sawtooth for the waveform? That would be cool I think

That's done already, feedback > 4, SAW is used 
https://github.com/Ixox/preenFM2/blob/master/src/utils/Hexter.cpp#L549

1219

preenfm2 and preenfm3 / Re: Stuck on splash screen

« on: October 14, 2016, 09:29:27 AM »

Very weird.
Does it also freeze with the "non O" 2.06 version ?
When back to 2.02o it's working again ?

1220

preenfm2 and preenfm3 / Re: Any other project ??

« on: October 14, 2016, 09:25:22 AM »

No other project in mind.
I'd like to spend more time on making music 

1221

preenfm2 and preenfm3 / Re: New firmware 2.06 (October 13th 2016)

« on: October 13, 2016, 07:30:36 PM »

An annoying missing midi note bug was introduced in 2.05.
Please upgrade to 2.06.
See first post for more details.

1222

preenfm2 and preenfm3 / Re: [resolved ?] FW 2.05 Voice allocation instability?

« on: October 13, 2016, 07:20:39 PM »

Cool. Thanks for the update. 

1223

preenfm2 and preenfm3 / Re: FW 2.05 Voice allocation instability?

« on: October 12, 2016, 09:12:19 AM »

Please let me know if that fix the problem :
https://dl.dropboxusercontent.com/u/41654198/preenfm2/firmwares/pfm2_2.06.zip

1224

preenfm2 and preenfm3 / Re: Star Quad Cable

« on: October 12, 2016, 09:11:39 AM »

Thanks for sharing, that's very interesting.

1225

preenfm2 and preenfm3 / Re: FW 2.05 Voice allocation instability?

« on: October 11, 2016, 11:34:35 PM »

The missing note was actually a bug introduced in 2.05. It was a stupid mistake 

I spent time on an other hanging note that is obvious when setting voice to 1 glide to 0 and playing lots of notes at the same time.
I think i have the fix.

Will upload a new firmware tomorrow.

1226

preenfm2 and preenfm3 / Re: FW 2.05 Voice allocation instability?

« on: October 11, 2016, 12:16:26 PM »

Yes i've also noticed some missing notes with FW2.05 a couple of days ago.
I think it has been introduced by the voice allocation change i made for the "ghost note" fix 
I'll take a look.

1227

preenfm2 and preenfm3 / Re: why fm and not pm

« on: October 11, 2016, 09:01:43 AM »

Because the preenfm1 started as a simple hobbyist project, and i first coded an FM algo 

FM is a little harder because it adds a frequency shift as soon as you have 3 or more operators in a row.
That requires low a pass filter between them to get rid of that.
I think that's the main problem manufacturers had in the 80s, which make the FM harder to implement on their hardcoded chips.

Xavier

1228

preenfm2 and preenfm3 / Re: Custom algorithms

« on: October 10, 2016, 10:10:25 PM »

Hi,

Would be an interesting project...
But don't expect the same polyphony with not hardcoded algo.

I think to experiment the easiest way is to add you own algos in the code :
https://github.com/Ixox/preenFM2/blob/master/src/synth/Voice.cpp#L291
Even witout coding knowledge, look at each algo structure, with some copy&past, that could work. 

Best,

Xavier

1229

preenfm2 and preenfm3 / Re: Balanced outputs

« on: October 07, 2016, 09:15:43 AM »

Hi,

Majority of synth have unbalanced output because the difference is tiny with farly short cable.
But you have to use UNbalanced cable. Do you ?

Moding the preenfm won't be straightforward because kits are provided with mono audio jack.
There's lots of info on the web on how to turn unbalanced signal to balanced signal. JLMAudio use a "floating" balanced on the output of some of its preamps, which would be an easy passive mod.
See the bottom right of : http://www.jlmaudio.com/Baby%20Animal%20Mic%20Pre%20with%20JLM14%20with%20JLM99v%20or%20Hybrid%20on%2048v.pdf


If you use UNbalanced cable, not to long cable, and if your preenfm2 is noisy with RF interference, the problem may come from something else.

Xavier

1230

preenfm2 and preenfm3 / Re: New Build Issues

« on: October 05, 2016, 02:20:25 PM »

This fixed the problem. Thanks so much! I guess that means when I get the metal shield and metal case in the mail it will solve my problem. This will work in the interim!
edit: I kinda feel like a prefabricated shield should be included as a part future kits. I know you intended the resistor to resolve the issue, and it does reduce SOME of the noise, but a shield is still required it looks like.

Good news 

The resistor alone is not suposed to fix the problem.
"Resistor + Shield" is the solution