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Messages - opus.quatre

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PreenFM2 / Re: Thoughts about operator tuning
« on: September 23, 2017, 09:28:39 PM »
I like reading this thread.. This collaborative atmosphere, leading to an interesting improvement of the machine.. People having ideas, expectations, people having skills, people helping.. All this is a delight..

PreenFM2 / Re: reset to default, waveform .txt, arpgeggiator toggle?
« on: September 23, 2017, 08:07:26 PM »
About waveforms..
"Adventure Kid Waveforms (AKWF)

AKWF is a collection of one cycle waveforms sampled from various sources intended for use as oscillator shapes in samplers and synthesizers.

Length = 600 samples
Pitch = D1+2

You find them on-line at:"

600 samples per cycle is small, and is a good source of aliasing.. Maybe Audacity or any other wav editor can re-sample/filter them to 4096sample waves ??

But one has to remember that user waveforms are not saved with the preset.. Up to 6 user waveforms can be stored in the SF card, and then they are loaded when you power-on your Preenfm2..
If you make, for example,  a preset using userwaveform 1, and if you then delete or replace this userwaveform 1, then your preset will no more sound the same..

I don't know if anyone ever used any userwaveform for FMsynthesis, and I'm not sure that this feature is really imoprtant..

I can imagine you use the last algorythm ; 6 detuned carriers, each one using its own waveform, or all of them using the same waveform, and the individual envelopes would in fact make an evolving mix of them.. I would love this feature, but only with a bank of more than 6 userwaveforms, and filters, and filter envelopes.. In fact, a kind of Roland D20 or Ensoniq ESQ'1/SQ'80.. But that's not the purpose of the Preenfm2..
Have a nice time..

PreenFM2 / Re: Multi USB inputs..
« on: September 23, 2017, 05:23:09 PM »
Oh.. I see.. I took the problem by the wrong side.. I was almost sure that Preenfm2 was class compliant.. But yes, now I remember that when I had just a kboard and the preenfm2 connected, without any computer, that was through MIDI and not USB..

PreenFM2 / Multi USB inputs..
« on: September 23, 2017, 12:02:03 PM »
Hello there..

Been documenting on TEControl products, mainly for breath controllers..
They need a class compliant device, and I believe that Preefm2 is..
I mean, I believe that I would just have to plug the Breath Controller into the Preenfm2 and blow, and the device would sent its CC2 values and Preenfm2 would understand them, and obey..
The Pedal controller seems an interesting device too..

The thing is : If I plug the TEControl module into my preenfm2's USB socket, then I have no more USB socket to plug a Kboard into.. I can still use a MIDI DIN input, sure..

But is there a way to have 2, 3 or even 459 USB sockets to control the Preenfm2 ?? You know, for example, those cards we use on computers which multiply a single USB socket into 4 sockets ?? Probably not, as I suppose they need a piece of software to manage them..

Enjoy breathing..

PreenFM2 / Re: 2 filters in parallel
« on: September 23, 2017, 11:01:01 AM »
Hi again Lokki and Xavier and the rest of the world..

Concerning the existing filter, and especially in "bandpass" mode, I believe it would be very good to have a "direct volume", or "dry volume" control.. Or a balance "dry/wet" so that we could mix part . well why should I explain, you understood why..

When I use the FMsynth on Caustic, with an electric piano preset, I often add one or more "multifilter" in "Band Isolate" mode, which is a band pass+dry filter, the "Gain" button being in fact a mixer/balance..

The filter in Preenfm2 is a presently 3 parameter module, so there is one vacant place on the display, and one vacant encoder, which could be used for this purpose..

Have a nice day..


PreenFM2 / Re: custom extended firmware
« on: September 23, 2017, 10:40:57 AM »
Hello @Lokki..
And hello @Xavier..
ANd hello @Everyoneelse..

First of all : a big thanx for the "hertz" detune which, I believe, should be an option available on each single synth.. Nothing more boring that a 4hz "beating" in the upper octave when the ensemble effect in the lower one is so slow and sweet..
I think that, using the mattrix, it was still possible to use Note Scaling as source, OpFreq as destination, and a negative value (-0.0001 ???) if the detune is >0, and vice versa, but that means  using up to 5 matrix slots, and some time to set all this up.. And that would waste the Note Scaling which can be useful for envelope rates or Modulation Indexes..
This HZ function will be more versatile, lighter, easier to use, less dispendious.. If I'm allowed to vote, I would vote for Xavier including this function/option in the official firmware..

Second : Usercc is probably an useful feature too.. I can't tell for the 2 other new features, as I don't understand much what they are and what they mean.. I need more experience..

Third and last : Autumn is here.. Enjoy it..

PreenFM2 / Re: Output volume vs polyphony..
« on: May 16, 2017, 09:53:06 AM »
Ah yes, ok.. And I guess I will have less aliasing when the polyphonique is reduced..
OK. . Thanx Xavier..
 Bonne journée. .

PreenFM2 / Output volume vs polyphony..
« on: May 15, 2017, 05:51:44 PM »
Hello there..
Is it normal if I get a big difference in output volume, when I turn the polyphony "knob" ??
On my preenfm2, the output volume is decreasing, as long as I increase the polyphony, and vice versa.. Is it the normal behaviour ? Or is it just on mine ?

And still.. Enjoy your sun..

PreenFM2 / Re: A higher polyphony ??
« on: May 15, 2017, 12:24:54 PM »
No worry Xavier..
I understand..
Have a nice day..

PreenFM2 / A higher polyphony ??
« on: May 13, 2017, 10:33:10 PM »
Hello there.. And most of all, hello Xavier.. Because this message is mainly for you..

Let's say that the subject will be : would it be possible to make a version of PreenFM2, with a bigger polyphony, by using a pair of Preenf405, one would be the master, and the other would simply be the slave ??

I know that the PCB is not made for it.. But we can probably imagine that, instead of placing the Preenf405 board in the IC support, we could use headers, and connect a second PCB which would hold both Preens..

My old Ensoniq ESQ'1 has a "overflow" option, in its MIDI menu, which allows driving a second ESQ'1 (or a ESQ'M expander) when the number of midi notes received, exceeds it's own polyphony (8 notes)..

The master Preen would then have to send exceeding notes to the slave, and performance control like pitch bend, mod wheel etc.. In fact a full bunch of incoming midi messages.. But not only ; it would also have to send all the preset (or combo) parameters, so that both play the same preset or combo..
The slave would be totally hidden, the user would not have access to it : it would only be there to obey to the master..

Each preset or combo that we would save in the master, would be saved identically in the slave's memory, same preset or combo number..

In terms of price, what would it cost ? Of course, an added PCB, and a second Preen.. What else should be doubled ?
What else should be added ?? I think that there would need a mixer.. Possibly digital mixer, or analog, but prior to the final stage, so that we can use the volume knob to set the volume of the mix..

I know, Xavier, that your time is not infinite.. You have a life to live, and you once said that you would like to have time to play your music.. I understand this very well, and I can just approve you..
And in fact, except me, I don't know how many people would be interested in having a more polyphonic version..
I'm just wishing that I could have a "wider" preenFM, (mainly for electric pianos, in fact) and by this message, I'm opening the topic, for discussion.. But if you say "no way", or "no time", or "too complicated", and even "useless when it concerns only you", then I would fully understand and abandon my wish..

Have a good week end..

PreenFM2 / Re: New slippers -> no USB
« on: May 12, 2017, 08:59:37 PM »
Oh.. I see.. Ok, it works.. Thanx Big Secret..

PreenFM2 / Re: New slippers -> no USB
« on: May 11, 2017, 07:33:21 PM »
"Preen is once again visible as a connected device on my PC  :D"

oh.. This makes me remark that my own PreenFM is not visible as a device.. Has never been, in fact.. Did I miss something when building it ?? Is there a parameter to set up, somewhere ?

PreenFM2 / Re: Z-plane/Morph filter
« on: May 11, 2017, 07:22:29 PM »
I arrive after the battle..
Just reading this topic, I thought..
Well, as long as one wants to use 2 sounds, and morph them at different ratio, the matrix can be the tool..
By selecting one modulation source, let's say the mod wheel, on both of the presets.. And the destination would be, on each of those presets, "all mixes" etc.. But the multiplier would be +10 on one preset, and -10 on the other preset..
Then you could use the mod wheel to morph from one preset to the other..

But another source could be selected, like after touch, velocity, breath controller..
But sure, you already had figured it out..

Have a nice evening..

PreenFM2 / Re: Connecting..
« on: May 11, 2017, 07:00:13 PM »
Désolé, Xavier, pour mon retard à te lire et à te répondre.. ET merci pour le temps que tu consacres à mon (petit) problème..
Maybe I didn't say that my PreenFM2 works correctly when powered by USB..
It simply doesn't work ONLY when I power it through the 9V entry..

"Is the LCD brighter when you switch on the preenfm ?"
Not sure I understand the question.. Brighter than what ? Brighter than when switched off, of course..
When I plug the 9V, the blue leds will be "on" for one or 2 seconds.. Unstable,  but on.. The LCD will be lit; or say bright, for the same amount of time.. But nothing appears on the LCD.. No welcome message or whatever.. and the 7805 will start heating the room..
That's why I ususally don't stay more than 5seconds..
Then I unplug it.. And if I immediately plug the 9V again, then nothing happens.. No blue led, no bright LCD..

And I don't know where is my multimeter, so I can't check anything for now.. I will, when I find it back..

But when plugged and powered through USB, everything works perfect..

PreenFM2 / Re: Connecting..
« on: May 04, 2017, 07:15:12 PM »
Merci Xavier..
No, there was no smoke, I was just kidding.. But still the 7805 was very warm, and nothing was working..
I checked the capacitors, and they are correctly souldered in the right polarity.. And so are the diods, and so is the 7805..

ANd stupid me, I searched for the MIDI connection in the build page, I didn't think it could be in the "the case" page.. Thanx again..

Have a nice evening..

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