[ANN] Repro-1

[Funkybot's Evil Twin]

I would need an audio example to see what they mean. My guess is, due to the principle-induced difference in filter frequency, one filter method often has more "resonance locking" artifacts than another at a given oscillator frequency, or it pronounces some noise a bit more than another. That said, I don't think that any of the filters differ much in their aliasing behaviour, and that's also not the point of this.

In general, yes there is a tad of aliasing, there always is, "aliasing free" is a myth, but it doesn't make much of a difference for the result. The final version (which goes to 50+ kHz) can be tweaked for less aliasing, if need be.

I don't think it's aliasing but 1 has a TON of artifacts at max resonance and a fairly low cutoff compared to the others. I think that's what people have been calling aliasing. The difference in the amount of noise and behavior is obvious in moscom_electronic's post here: http://www.kvraudio.com/forum/viewtopic ... 0#p6431179

I'm pretty sure that's why some people think 1 sounds terrible, while others kind of dig the instability of that filter.

[Urs]

I'm pretty sure that's why some people think 1 sounds terrible, while others kind of dig the instability of that filter.

One of our guys has already suggested to model the Polivoks or Wasp instead... where there's almost something like it...

[aaron aardvark]

Just got back from a vacation, and must report my initial impressions of RePro (which I was looking forward to trying). I wrote down my settings for a stereo bass synth from my real Pro-One that I liked a lot. Set it the same on RePro, it sounds somewhat different from my Pro-One that could use some work (though RePro has the basic Pro-One sound). So I made some tweaks to RePro (which seems to be not in stereo; hope it will be in the future) to make it sound as close as I can to the Pro-One (so far I like filter model #4 the best; though I would typically avoid "extreme" settings with resonance). It does sound pretty close to my Pro-One, but just not the same without the stereo sound. So in Cubase LE4, I had a quantized bass sequence (Oscillator A full volume, and Oscillator B no volume) and bounced the audio to another track. Don't know if it is intentional, but the bounced audio is not in sync with the MIDI. Then I bounced the RePro audio with Oscillator A with no volume, and Oscillator B full volume: it seemed to be playing significantly different notes. I wanted to pan the first bounced audio to the left, and the second bounced audio to the right. They are kind of in sync, but obviously not correct. CPU load is pretty brutal. Not sure if a stereo RePro would be that much worse with CPU load. Comments Urs/u-he/anyone else (especially concerning the sequencer not working correctly)?

[zerocrossing]

Just got back from a vacation, and must report my initial impressions of RePro (which I was looking forward to trying). I wrote down my settings for a stereo bass synth from my real Pro-One that I liked a lot. Set it the same on RePro, it sounds somewhat different from my Pro-One that could use some work (though RePro has the basic Pro-One sound). So I made some tweaks to RePro (which seems to be not in stereo; hope it will be in the future) to make it sound as close as I can to the Pro-One (so far I like filter model #4 the best; though I would typically avoid "extreme" settings with resonance). It does sound pretty close to my Pro-One, but just not the same without the stereo sound. So in Cubase LE4, I had a quantized bass sequence (Oscillator A full volume, and Oscillator B no volume) and bounced the audio to another track. Don't know if it is intentional, but the bounced audio is not in sync with the MIDI. Then I bounced the RePro audio with Oscillator A with no volume, and Oscillator B full volume: it seemed to be playing significantly different notes. I wanted to pan the first bounced audio to the left, and the second bounced audio to the right. They are kind of in sync, but obviously not correct. CPU load is pretty brutal. Not sure if a stereo RePro would be that much worse with CPU load. Comments Urs/u-he/anyone else (especially concerning the sequencer not working correctly)?

Why would a plug in like this be stereo?

[Funkybot's Evil Twin]

Why would a plug in like this be stereo?

Because the original synth is.

The original synth can put out a stereo signal, but I've never used one and I'm not actually sure what's different in the right versus left channel (if anything at all). I'm hoping Aaron or Urs can answer.

[aaron aardvark]

zerocrossing and Funky,
Perhaps I am deluding myself hearing two identical mono signals, and they sound fuller as you pan them apart. Though if you have Oscillator A at a different octave than Oscillator B, you don't hear the higher octave in a different ear. The Pro-One's operation manual says, "The audio output can drive a monophonic or stereo amplifier, or stereo headphones." But perhaps that just means you don't just get one mono output in only one ear. Whatever is going on, it does sound rather different as you pan them, but maybe that happens with any two identical mono outputs (like a regular electric bass guitar) being panned.

[Shiek927]

After playing with the synth. I can definitely say that the 1st one is my favorite, with 5 being my second favorite .

The filter models progressively felt like they had less...I don't know, character? like they were more digital? I tried not to get caught up in analogue vs digital, and instead tried to think about which filter sounded the most musical and pleasing to my ears.

Number 5 was close, but numero uno was my favorite. Turning the resonance to max, and slowly playing with the filter...there was a smoothness and sound to it that the others didn't have. It wasn't a volume thing either. It just felt like that particular filter had 'life' to it, that the others just didn't. They were more plainer in comparison.

That's about all I can say XD

[david.beholder]

Some cryptic notes:

1a. low c, with cutoff ~2 and resonance is at 11 , filters 1, 4 have twice faster beating than filters 2,3,5 - that's really bold hint
1b. adding to experiment 1a swiping cutoff from 3 to 9 - filters 1 and 4 leaving more high frequency fizz (exactly like Dom 1 is behaving)

2a. on low c with env filter sweeping, resonance at ~7 -- 1, 4 has distinctive volume jumps, 5 is medium, 2,3 are low
2b. adding osc 2 (oct 4 saw) as filter fm at 5 to experiment 2a: 1, 4 are affected instantly, 3 is also instantly but with different behavoir 2, 5 with noticable delay

So filters are grouped as
1-4, 2-5, 3 - the rest is easy guessable

[larsomat]

I got some issues with Repro and Bitwig. I can't even use it as only plugin loaded. The CPU load is too high.

I don't have this problem in ableton 9 or Logic X. Don't know if it's a Bitwig issue or a Repro issue, but I thought you guys should know.

Sounds awesome, btw! I'd love to be able to use it in Bitwig, but for now I'm happy to use it in another DAW and just bounce the audio. Wouldn't be such a big difference anyway. Immediate bouncing is the only way I could use it, even in Logic or ableton. Just like I would use a real analog

[HcDoom]

Filter 3 and 4 sound great. Filter 1 is dirty, but I guess most people wont like it...to me its also ok, I always loved dirtier stuff anyway.

URS, please, say to your support to check for license transfers requests, Ive been waiting forever.

[Urs]

URS, please, say to your support to check for license transfers requests, Ive been waiting forever.

Sorry, we hadn't had internet access during Superbooth. The guys are slowly making their way through the support tickets that have arrived since Thursday.

[Cyoon]

I'm pretty sure that's why some people think 1 sounds terrible, while others kind of dig the instability of that filter.

One of our guys has already suggested to model the Polivoks or Wasp instead... where there's almost something like it...

would love to see some other vintage analog gear modeled apart from synths, UREI 1176 or other rare mastering gear..stuff like that.

just a thought..sorry for offtopic. The Repro sounds awesome.

[fluffy_little_something]

Too lazy to read all those pages...

On high notes filters 3 and 4 sound very distorted when using higher resonance, maybe aliasing, no idea.
2 and 5 sound the cleanest to me, relatively speaking.
1 also sound a bit dirty, but in a different way than 3 and 4.
With all of them there seems to be low resolution, I can hear the individual steps as the filter closes.

On lower notes I hear little difference, Frank Lee.

Not optimized is a euphemism, just loading the plugin maxes an entire core on my computer Oddly, playing a note doesn't increase the load at all, seems like its is always playing even if there is no sound

Very nice GUI, by far the best U-he GUI for my eyes so far...

[niektb]

Now what's the drone mode supposed to do?

[fluffy_little_something]

Seems to be a note hold feature, infinite release