KVR Audio

Dandruff · Post by **Dandruff** » Wed Feb 02, 2011 4:13 pm

Would it be possible to offer compiled builds as download on Sourceforge too?

antto · Post by **antto** » Wed Feb 02, 2011 6:18 pm

i think the latest version of the source is also the latest built version
unfortunately, sourceforge seems to be down these days (attacks or somethin)

Music Engineer · Post by **Music Engineer** » Wed Feb 02, 2011 8:43 pm

antto wrote: i don't remember what the latest built release was
it had a GUI for sure (the first release(s) didn't)

btw, Robin, how's it going? doing some other bigger stuff i guess ;]

yes, lots of stuff to do. EchoLab needs some update, Liberty must be pushed forward, currently i'm spending some time on research on one-sided polynomial interpolators and then there's some new contracting work in sight (which is what pays the bills).

Open303 as such does not (yet?) have a GUI and never had. i did my own derivative of Open303 (the AciDevil) which has a GUI and then there were some mGUI-wrapped versions posted in this thread (IIRC) but these are not part of the project over at sourceforge.

i'm actually already quite happy with the audio engine as is, so i could consider the project as more or less "finished". but i know that you are much more pedantic and painstaking in getting the 303-sound exact. so if you feel like it, grab the code and improve it. same goes to anybody else who wants to improve the audio-part and/or slap a GUI on it.

however, i've just added a binary build version to the project (as zipped dll).

Kriminal · Post by **Kriminal** » Wed Feb 02, 2011 8:48 pm

what filter does it use?

Music Engineer · Post by **Music Engineer** » Wed Feb 02, 2011 9:09 pm

Kriminal wrote:what filter does it use?

it's a multimode implementation of the moog ladder, one of the available modes is a 18 dB/oct lowpass (it uses the 3rd tap output instead of the 4th). there's also a special TB-303 mode based on equations by kunn and mystran and coefficient fittings by antto, posted somewhere in the jungle of this thread.

edit: it's actually a variant of the moog ladder with an additional highpass inside the feedback path. ahh...and i see that the implementation of the kunn/mystran filter needs some obvious optimization

Kriminal · Post by **Kriminal** » Wed Feb 02, 2011 10:36 pm

similar to this?

http://www.timstinchcombe.co.uk/synth/d ... diode.html

Dandruff · Post by **Dandruff** » Thu Feb 03, 2011 7:18 am

Robin from www.rs-met.com wrote:however, i've just added a binary build version to the project (as zipped dll).

Thanks Robin! Hope you guys have time to continue the development of it ...

NAS · Post by **NAS** » Thu Feb 03, 2011 7:08 pm

Robin any chance you can link to the AciDevil, Only one i can find and been using has no GUI but does have a bunch of unused params which show up in my host haha
AciDevil is really nice by the way, i love the filter drive and so on.

NAS

Dandruff · Post by **Dandruff** » Thu Feb 03, 2011 7:12 pm

NAS wrote:Robin any chance you can link to the AciDevil, Only one i can find and been using has no GUI but does have a bunch of unused params which show up in my host haha

Same here. That's the one from post #1.

Any known limitations of the Open303 r5? All samplerates supported? Any hidden tricks to get certain sounds out of it?

ParadoxUn · Post by **ParadoxUn** » Sat Feb 05, 2011 5:38 pm

I thought'd I'd poke around with the filter. However I ran a binary, from a post earlier in the thread, (acidevil) and it did not run on Logic. (?)

Music Engineer · Post by **Music Engineer** » Sat Feb 05, 2011 5:46 pm

ParadoxUn wrote:I thought'd I'd poke around with the filter. However I ran a binary, from a post earlier in the thread, (acidevil) and it did not run on Logic. (?)

logic? are you on mac? in that case, no surprise - the binary is built for windows pc. or is it the old version of logic (5.5 IIRC) that still runs on windows?

anyway, i'll see if i can dig out a somewhat more recent build of AciDevil. however, it will be very unfinished (unlike Open303, which i consider more or less done (albeit still improvable, of course), as said)

ParadoxUn · Post by **ParadoxUn** » Sat Feb 05, 2011 5:51 pm

Remember, you don't need complex filters here. The original is just feedback paths, so simple cascaded onepoles will do.

buf1 = ((-buf1 + in1) * cut) + buf1;
buf2 = etc.

The hard part is the resonance, which on the 303, due to saturation, and possibly other factors, such as leakage, sounds quite particular.
Usually when you turn the rezo to max, you will have selfoscillation in the top frequencies only, while the lower end, is a saturated very melodic mess.

For a digital version, I guess one would want perfect keyfollow aswell, and maybe other things. Some like to reduce the reduction of bass, when turning up the rez aswell. The important thing is to get the saturation right, so the rez sounds smooth. IMHO.

ParadoxUn · Post by **ParadoxUn** » Sat Feb 05, 2011 5:52 pm

Robin from www.rs-met.com wrote:
ParadoxUn wrote:I thought'd I'd poke around with the filter. However I ran a binary, from a post earlier in the thread, (acidevil) and it did not run on Logic. (?)
logic? are you on mac? in that case, no surprise - the binary is built for windows pc. or is it the old version of logic (5.5 IIRC) that still runs on windows?

anyway, i'll see if i can dig out a somewhat more recent build of AciDevil. however, it will be very unfinished (unlike Open303, which i consider more or less done (albeit still improvable, of course), as said)

It's an ancient version for PC.

ParadoxUn · Post by **ParadoxUn** » Sat Feb 05, 2011 6:05 pm

I'm trying out open303 now, lets hope that works. I hope it uses full audiorate modulation though, you need that for some of the lasery 303 sweeps.

ParadoxUn · Post by **ParadoxUn** » Sat Feb 05, 2011 6:21 pm

Nope, it compiles and shows up in Logic, but the plugin itself doesn't seem to be getting any midi from Logic.

Open303 - open source 303 emulation project - collaborators wanted