[Repro-1] Public Beta

[Howard]

Urs, what's the minimum delay time of Lyrebird?

Simply turn up the regeneration and check the note...
Not 100% sure about the octave, but I think it's G3 (196Hz = about 5ms). G2 would be 10ms.

[aaron aardvark]

Urs,
Scientifically speaking, would it take a buttload of money to have a computer with "a shitload of CPU power"?

[Urs]

How does the recent Moog modular iPad app do in this regard?

I won't comment on specific software, and this one I don't even have.

But you can try for yourself. If the app allows this, take a VCO output and connect it to its own PWM input. You might have to route it through an inverter first fro negative intensity. Then check if the signal stays smooth while you wiggle the modulation depth, or if it becomes a horrible mess.

The problem is, oh, I'm high, so let's lower the pulse width, but uh, now I'm low, so let's raise the pulse width, but uh oh, now I'm high again, I need to lower it... and so on. It's a ridiculously good example of how adding just a sample or two of delay in a feedback path creates a world of sonic disaster. Hence my obsession with zero delay feedback systems.

Also note that some softsynths which allow for PWM cross modulation between oscillators don't take the pulse output but, say, triangle. Which of course is a fake then.

[simonfloris]

Actually I just want to use the arp,
I'm playing a chord with the initial patch, change the arp to up,and i see the leds in the keyboard bar changing, but that's all.
I only hear a constant pitched -note.
There are no new notes triggered (pitch is not changing and envelopes are not retriggered).

I tried hard, but I am still not able to reproduce this, neither on Mac nor on Windows.
Which OS and DAW host are you using? And could you maybe save a preset where this happens and post it here? I would like to check how it works if I try the same preset.

Hi, I attached a preset originating from initial state with some additional knob-noodling that has nothing to do with the issue .

Using windows 10x64 Pro 1511, Cubase 8.5.20 x64, RME UFX

I noticed that I can workarund the issue by putting the sequencer to play with e.g. one note-length at zero pitch for "standard" arp behaviour.
Seems odd, but may be intentional?

Regards,

Simon

[love80hz]

Hi,

I noticed a strange behaviour while having both arp and sequencer activated:
Init patch -> change arp-mode to "up" -> change sequencer mode to "play" -> hold multiple keys.

The moment I have multiple keys down, the sequencer transposes the notes kinda randomly, depending on the notes held.
No problems with basic arp when sequencer is off.

Is this a bug or am I missing something relevant?

I'm using reaper and tested this in both 32 and 64bit.

<nitpick>
I also found that the bridged repro-1's gui window (64bit vst in 32bit reaper or vice versa) can get a bit buggy
</nitpick>

[tasmaniandevil]

Hi, I attached a preset originating from initial state with some additional knob-noodling that has nothing to do with the issue .

Thanks a lot for the preset and the information, I will try this soon.

[tasmaniandevil]

I noticed a strange behaviour while having both arp and sequencer activated:
The moment I have multiple keys down, the sequencer transposes the notes kinda randomly, depending on the notes held.
Is this a bug or am I missing something relevant?

Hehe, no worries, you are not missing something relevant. That's one of the weirder bugs that slipped through into the public beta. The guys are already working on it.

[FLWrd]

hehe, sounds odd - how do you observe CPU usage? Make a new project in Logic or look at Activity Monitor?

I use Activity Monitor to look at Logic's CPU usage. When just loading Logic, CPU usage is around 6%. Adding RePro-1 pushes it to 30-35%, and closing the document only lowers it to 25%. Other plugins don't exhibit that behavior.

[knowix]

Hehe, I don't think anything remotely modular can be perfectly emulated at this point of time. ACE and Bazille work because they don't try to be anything specific. But for, say, an Arp 2X00 you'd need a shitload of CPU power.

Take any modular software synthesizer (including ACE, to my embarrassment), let an oscillator with pulse wave PWM itself by -50% or so. You'll hear the disaster. Try the same in Repro-1, or any analogue synth. It took us months to get it going in Repro. Can't imagine how difficult it must be to get good results in a modular synth.

I was just thinking this morning that the scope for ridiculous amounts of feedback would probably be the thing that could encourage me to go modular. Otherwise I think modular is horribly overvalued.

Regarding the notion that improving Ace would scratch some people's 2600 itch. Is Ace actually priced too cheaply to warrant spending time on?

[Urs]

Is Ace actually priced too cheaply to warrant spending time on?

Depends on the amount of time...

[Urs]

hehe, sounds odd - how do you observe CPU usage? Make a new project in Logic or look at Activity Monitor?

I use Activity Monitor to look at Logic's CPU usage. When just loading Logic, CPU usage is around 6%. Adding RePro-1 pushes it to 30-35%, and closing the document only lowers it to 25%. Other plugins don't exhibit that behavior.

Indeed, Logic doesn't kill off the plug-ins in a project when one closes it

I guess they do that in case it was closed accidentally or something.

Once one creates a new project, the plug-ins get purged... interesting!

[RedChameau]

take a VCO output and connect it to its own PWM input. You might have to route it through an inverter first fro negative intensity. Then check if the signal stays smooth while you wiggle the modulation depth, or if it becomes a horrible mess.

Hi,
For the sake of it and FYI, I just tried that in Arturia's take on ARP2600 (V3) and it does not become such an horrible mess.
I doubt it mimics well the original behaviour either

Instead, it brings some king of a subtle "modulated fuzzy distortion". I tried with self modulation, self inverted modulation as you sugessted and also with another VCO tuned 1 and 2 octaves lower (which yields the best results).
Maybe you should try it Urs or someone at UHE.
I don't know what kind of a workaround they found for this specific issue, but I thought it would be interesting to report this.

[tasmaniandevil]

Hi, I attached a preset originating from initial state with some additional knob-noodling that has nothing to do with the issue .

Using windows 10x64 Pro 1511, Cubase 8.5.20 x64, RME UFX

I noticed that I can workaround the issue by putting the sequencer to play with e.g. one note-length at zero pitch for "standard" arp behaviour.
Seems odd, but may be intentional?

Hi Simon,

I have tried the preset on Windows 10 64bit with Cubase 8.5. Everything is playing as it is supposed to, at least over here on my computer.

The envelopes will not re-trigger in your preset because you have to set 'Trigger Mode' from 'Norm' to 'Retrig' (on the synth page, in the Mode section, right next to the Glide section) to make this happen. As long as it is in Norm mode, the arp will play legato, i.e. it will update the pitch (when you hold multiple notes), but it will not trigger the envelopes repeatedly.

And as long as you hold just a single note on your keyboard, the arp will just play a constant note, even if you have set Trigger Mode to Retrig. This is intentional.
But as soon as you hold more than one note, you should hear the pitch changing and the envelopes triggering.

[Urs]

I tried with self modulation, self inverted modulation as you sugessted and also with another VCO tuned 1 and 2 octaves lower (which yields the best results).

How do you invert the signal? I couldn't quite work that one out.

It occurs to me though that the modulation rate isn't exactly audio rate, or that it's at least filtered a lot.

In an analogue oscillator, there won't be any warbling and garbling. It'll stay a nice and clean waveform.

[RedChameau]

How do you invert the signal? I couldn't quite work that one out.

In the voltage processor section (below the VCOs), click the little triangle between the IN.B and OUT jack sockets.

In an analogue oscillator, there won't be any warbling and garbling. It'll stay a nice and clean waveform.

Roger that !