[ANN] Repro-1

[Daags]

though i'm curious, in the case of the cv interactivity (via expert sleepers stuff), what's the benefit of using repro to send the trigger signals instead of just the midi directly ?

RePro would be sending audio is what I thought was meant

RePro-1 sending Audio, CVs, Gate and Trigger information to modular via Expert Sleepers stuff. In this patch RePro-1 oscillators run through Wasp filter controlled by Doepfer ADSR - which is triggered/gated by RePro-1. MFB VCA is controlled by RePro-1 VCA envelope and RePro-1 ModWheel is also added to Wasp filter cutoff.

reads like a lot more than simply sending audio, and letting midi->Expert Sleepers->modular vca/cutoff/etc do the rest.

[hakey]

You can modulate pretty much any of their parameters with Odyssey 2.

Audio rate?

[mholloway]

So now this whole thread is just people posting info and links to the emulations they want Urs to do next, when we haven't even gotten a hold of the Pro One yet...

[murnau]

Few hours left till monday!

[Urs]

Few hours left till monday!

It ain't gonna be in the early morning hours - I needs some before it happens.

[murnau]

Few hours left till monday!

It ain't gonna be in the early morning hours - I needs some before it happens.

Of course.. Understandable.

[Urs]

Alpha is up:

http://www.kvraudio.com/forum/viewtopic ... 1&t=460687

[PiotrPochwat]

Hmm.. in my opinion - filter nr.4

[bcm70]

I'm not much of an alpha tester - spent 10 minutes trying to figure out which filter was the most analogue (couldn't) then spent the rest of the night playing around with the synth. Sorry Urs

[toby]

4 sounds best to me for short snappy sounds (maybe a bit more weight to the attack)

[david.beholder]

I think poll and discussion should be separated otherwise most of the choices would be biased.

[Urs]

I think poll and discussion should be separated otherwise most of the choices would be biased.

We voted for this format because of ease of use. We could have done a true double blind test with individually randomized choices and a webform like we did in Retroverb. We didn't because we don't need to:

• the proof that numerical methods make audible difference is a great message in itself
• the discussion is more important than the result of the poll
• randomization would have suppressed the discussion and thus made it less interesting for us

[Urs]

Also, many people in the internal beta team have changed their mind after a few days, usually leaning towards the two more accurate methods. I wouldn't be surprised if we'd see the same here.

[david.beholder]

• the proof that numerical methods make audible difference is a great message in itself
• the discussion is more important than the result of the poll
• randomization would have suppressed the discussion and thus made it less interesting for us

Okay, I now see your ideas a bit differently.

Btw, two more question:

1. Why 50khz vs 25khz aka is filter affecting audible range aka what is transfer curve - not sure how to say it correctly?
2. There were mentions in that thread that 1st filter is aliasing - are you aware of it or it's someones imagination?

[Urs]

1. Why 50khz vs 25khz aka is filter affecting audible range aka what is transfer curve - not sure how to say it correctly?

Two or three of the lesser algorithms "blow up" beyond 25kHz. So I capped them all. The final version will need to go to 50+ kHz in order to have 0 dB attenuation within the audible range. Like a real Pro-One.

2. There were mentions in that thread that 1st filter is aliasing - are you aware of it or it's someones imagination?

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.