KVR Audio

homunculus · Post by **homunculus** » Wed May 16, 2012 6:52 pm

Andy i'm bored, give me some good news! lol
btw I was working on another project and again I got that bad distortion in the 1K area on some vocals and on some acoustic pianos, I got so mad I trashed the project! lol I'm not going to start any new songs until the Drop comes out. I'll dedicate this break to improving my sound design!

Cheers
Wilson

andy-cytomic · Post by **andy-cytomic** » Wed Jun 06, 2012 4:34 pm

News update: I've been double checking all my maths against the original analog devices I'm modelling which has been loads of fun. In summary the models are really standing up well and I'm very happy with the results and there is very little I need to change if anything in the tone.

Up until now I've just been going on the schematics since it has been really hard to track down synths in my home town of Perth. I've since travelled to London and bought an MS20 rev2 and a Moog Prodigy, and I've also ordered and received 4xIR3109 and 4xBA662 chips and I'm going to build my own custom Roland JP8/Juno6 inspired low pass and high pass filters (the originals only have low pass).

I'm still travelling for a little bit longer but once I'm back home I'll upload some new audio examples doing some A/B comparisons with the analog circuits.

MFXxx · Post by **MFXxx** » Wed Jun 06, 2012 4:57 pm

andy_cytomic wrote:News update: I've been double checking all my maths against the original analog devices I'm modelling which has been loads of fun. In summary the models are really standing up well and I'm very happy with the results and there is very little I need to change if anything in the tone.

Up until now I've just been going on the schematics since it has been really hard to track down synths in my home town of Perth. I've since travelled to London and bought an MS20 rev2 and a Moog Prodigy, and I've also ordered and received 4xIR3109 and 4xBA662 chips and I'm going to build my own custom Roland JP8/Juno6 inspired low pass and high pass filters (the originals only have low pass).

I'm still travelling for a little bit longer but once I'm back home I'll upload some new audio examples doing some A/B comparisons with the analog circuits.

Wow Andy really makes us all appreciate the passion and dedication you're putting into this. Really looking forward to the release.

So are you also developing hardware to emulate in The Drop, interesting.

Feels more than May 2011 when this was announced. Taking a while and now I definately appreciate why including your family expansionn unit

Sounds like you still have a lot of work to do, is the ETA autumn/winter '12?

Need another fix

andy-cytomic · Post by **andy-cytomic** » Wed Jun 06, 2012 6:31 pm

MFXxx wrote: Wow Andy really makes us all appreciate the passion and dedication you're putting into this. Really looking forward to the release.

So are you also developing hardware to emulate in The Drop, interesting.

Yes, I've actually designed a completely new 2 pole high pass circuit for the MS20 rev1 and adjusted the MS20 rev2 circuit to allow for 2 pole operation, both original circuits only have a one pole high pass which I felt just didn't cut it for a filter plugin. I just couldn't bring myself to buy a Jupiter 8 or Juno 6 since the former doesn't self oscillator, and the latter has a DCO and digital envelopes, so I instead decided to buy the chips and make my own since it's only really the filter I need and this way I can build the high pass version as well.

MFXxx wrote: Feels more than May 2011 when this was announced. Taking a while and now I definately appreciate why including your family expansionn unit

Sounds like you still have a lot of work to do, is the ETA autumn/winter '12?

Need another fix

I am making loads of progress but I'm not going to make any time announcements till I've completely finalised the dsp and I'm just working on the gui. I want this to be the best analog modelled filter plugin ever written so sorry it's taking so long.

MFXxx · Post by **MFXxx** » Wed Jun 06, 2012 7:12 pm

andy_cytomic wrote:
I am making loads of progress but I'm not going to make any time announcements till I've completely finalised the dsp and I'm just working on the gui. I want this to be the best analog modelled filter plugin ever written so sorry it's taking so long.

No apologies needed, didn't meean to angle for a release date - no push

Take your time. It's one of the plugins I've been looking forward to since announced and the recent sound demo's are incredibably good in my humble opinion.

Liking the ideas your are implementing with the filter mods. Interested to know if you are planning on both the originals and your tweaked designs?

valhallasound · Post by **valhallasound** » Wed Jun 06, 2012 7:19 pm

andy_cytomic wrote: Yes, I've actually designed a completely new 2 pole high pass circuit for the MS20 rev1 and adjusted the MS20 rev2 circuit to allow for 2 pole operation, both original circuits only have a one pole high pass which I felt just didn't cut it for a filter plugin. I just couldn't bring myself to buy a Jupiter 8 or Juno 6 since the former doesn't self oscillator, and the latter has a DCO and digital envelopes, so I instead decided to buy the chips and make my own since it's only really the filter I need and this way I can build the high pass version as well.

If you have an extra IR3109, I would suggest building the SH-101 filter. I love my SH-101, and would love to see the sound emulated correctly. The SH-101 filter has back-to-back diodes going to ground in the feedback loop, as opposed to the "linear" feedback loop of the Juno 6/60. I owned a Juno 60 back in the 90s (as did everyone I knew in Seattle - it was a REALLY common synth around these parts), and the filter was far more "polite" than the SH-101 filter.

Looking forward to progress reports on The Drop!

Sean Costello

andy-cytomic · Post by **andy-cytomic** » Wed Jun 06, 2012 8:08 pm

Hey Sean, yes it makes a lot of sense to breadboard a sh101 / sh09 filter since that is one less control voltage I need to supply. Since both of those designs are for mono-phonic synths with no patch recall roland just used potentiometers to control the resonance. They switched over to use BA662 OTA chips for the polyphonic synths. One of the reasons I ordered the chips is to check the signal levels and and see how far they are pushed into their non-linear regions.

The MS20s and the SEM 1As both use diode clippers in the feedback, so for the overall constancy of resonance bite it may make sense to use them for the "cascade" circuit type as well, I've already got all the code to do either it is just a matter of picking which is best - I don't want to have both since without resonance they will sound pretty much identical and I want each filter to have it's own character even without resonance.

Shy · Post by **Shy** » Thu Jun 07, 2012 11:11 pm

Andy, here (edit: and another) is a quick sample I made with the Threeler VCF I mentioned earlier, specifically showcasing its aggressive side. This 3-pole design is pretty much ideal, I love it. I don't know why you want to avoid 3-pole in The Drop. Anyway, I hope you manage to make something like it, because it's the best filter I've ever used.

faun2500 · Post by **faun2500** » Mon Jun 11, 2012 6:24 pm

Shy wrote:Andy, here (edit: and another) is a quick sample I made with the Threeler VCF I mentioned earlier, specifically showcasing its aggressive side. This 3-pole design is pretty much ideal, I love it. I don't know why you want to avoid 3-pole in The Drop. Anyway, I hope you manage to make something like it, because it's the best filter I've ever used.

THAT sounds PHATT! If the drop can sound like that I will buy.

4damind · Post by **4damind** » Mon Jun 11, 2012 6:32 pm

Andy, I have not followed all of the posts... Do you come closer to a release or is the project stopped?

Funkybot's Evil Twin · Tue Jun 12, 2012 12:06 pm

Just a few days ago Andy said he was pretty much done with the modeling piece (or very near the end) and we would get a release date once the GUI was in place. Should be soon now.

andy-cytomic · Post by **andy-cytomic** » Mon Jul 02, 2012 10:17 am

A couple more audio examples, these are bass arpeggiations played from an akai mpk mini live with some knob tweaking. I was in a daze last night drinking some red wine and nibbling on 70% dark chocolate playing these on headphones. I'm tweaking the cutoff, resonance, decay time of the env and filter drive:

http://www.cytomic.com/files/thedrop-moog-arp2.mp3
http://www.cytomic.com/files/thedrop-ms20v2-arp.mp3

I'll post some examples head to head with the Moog Prodigy and MS20v2 tomorrow some time, just geeky sweeps where you can listen to the distortion tones and intermodulation tones of the two to hear the quality of the models in a more scientific way.

meloco_go · Post by **meloco_go** » Mon Jul 02, 2012 5:12 pm

Sounds cool!

4damind · Post by **4damind** » Mon Jul 02, 2012 6:00 pm

Nice examples Andrew but don't forget to release it

djanthonyw · Post by **djanthonyw** » Mon Jul 02, 2012 6:37 pm

Any idea when the release date may be? I would like to be the first customer with this one as well.

Cytomic "The Drop" Resonant Filter