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Topics - stelpa

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PreenFM2 / High frequency tone coming from hardware itself!
« on: July 23, 2018, 05:35:20 AM »
Hi! I've seen plenty of people in this forum complain about a high frequency tone coming from the audio out of their preenfm2, but I couldn't find any thread related to this issue, being that there is a high pitched tone coming from the hardware itself! The tone isn't very loud, but it's definitely audible as soon as it's powered on, even if the audio out isn't plugged into anything.

Is there anything I can do about this? It's my only complaint I have about the preenfm, and if I could solve this it would be perfect.

If it helps, I have a preenfm2 with an OLED screen from Van Daal Electronics.

Thanks a bunch :)

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PreenFM2 / [Solved] [Feature Requeust] Per-Op Keytracking?
« on: December 06, 2016, 02:09:47 PM »
I have been playing with my Blofeld, and though it's FM is limited (only 3 ops), it has the great feature of variable keytracking setting per oscillator ("Op"). This allows lots of metallic tones and interesting modulations, and would expand the microtonal capabilities of PreenFM2 even further. What do you all think? :)

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PreenFM2 / [Im5] and mix parameters missing from mod matrix
« on: October 24, 2016, 04:46:43 AM »
Just noticed that the mod matrix only includes im #1 through #4, missing #5 (don't think any algorithms use im6). It also is missing the later mix parameters, most notable in the additive algo (the one with 6 carriers). Are these destinations not included for technical reasons, or is it that the matrix is based on older code? Thanks :)

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PreenFM2 / [Feature Request] Adjustable Seq/Arp Length
« on: October 23, 2016, 09:11:27 AM »
Hiya! Been really enjoying my Preenfm so far! As an owner of both the Preenfm and the Shruthi, I have to say that one thing Shruthi does better is it's sequencer implementation. On the shruthi (on the seq page at least), Knob 2 changes seq length, Knob 1 rotates the sequence (wrapping values around, a great feature), Knob 3 lets you navigate steps, and Knob 4 edits the step (could have the knob #s wrong). Whereas here, 2 knobs are taken up managing BPM and gate- while both are good features, they should probably deserve their own page to allow more in-depth sequence editing (perhaps a new page could show gate and bpm settings for both sequences simultaneously, two knobs each?). I think this is definitely worth looking into, since currently there is no way to have a sequence in any time signature other than 4/4, unless I am missing something drastically! I wanna make an FM waltz ;D

Thanks again for the wonderful machine Xavier, I hope you don't take all my silly suggestions as demanding / rude or mean-spirited, I am just excited to see the preenfm be the best it can be, and want to help ^.^

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PreenFM2 / Pulse Width Modulation for Square?
« on: October 22, 2016, 04:20:22 AM »
Just a silly crazy idea, but I imagine that doing PWM on a square wave in FM-world could be neat. What do you think? Is it feasible? :)

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PreenFM2 / Through-Zero FM?
« on: October 17, 2016, 05:03:14 AM »
Hello! Thankyou Xavier for the wonderful project.

I wanted to ask a question about the FM implementation PreenFM2 uses.

Is the algorithm "through zero" FM, or traditional? In case you don't know, through-zero FM continues modulation even after the modulator goes into negative side of it's wave (i.e. under the DC point / "0"), reversing the carrier's wave to simulate "negative frequency". It has a much fuller tone than traditional FM: Here is a video explaining it better: https://www.youtube.com/watch?v=N1Eo_P6iW-0

If it isn't implemented, would you consider adding it in the future? It would be a very unique selling point, since very few FM synths are capable of this (none that aren't modular, as far as I know!). Not sure how hard it is to implement though.

Thanks for taking the time to read, keep up the great work :)

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