KVR Audio

Chandlerhimself · Post by **Chandlerhimself** » Sat Dec 17, 2016 10:13 am

For those thinking of making Algos I thought I'd type up some things I've found.

Comb/C works better in parallel than series. Often times it will sound metallic, but when used with other modules it can be useful and sound pretty good. Adding an all pass afterwards can make things more diffuse. Another thing that helps is cutting some of the top end to get rid of the metallic ringing. Also adjusting the delay time can make a big difference in the sound.

All pass/A. This is useful to make the sound more diffuse. These work better in series. The more you put in series the more diffuse, but also the longer the attack takes. By itself it can also create a longer metallic ring that is different from comb.

CircularComb/cc. This is what will really take the metal out of your sound. The more modules you use the clearer it will sound IMO, but it will use more CPU. Using all passes and filters can sound good and create a natural sound inside cc.

Fdn4 this can sound extremely natural, but there is still a little metallic tone. Treating it as a combfilter and using it in parallel can sound very good. Everything I wrote about comb applies to this. This sounds better than comb IMO.

Once you play around with it you'll understand how everything sounds and how to get the sound you want.

MeldaProduction · Post by **MeldaProduction** » Sat Dec 17, 2016 10:29 am

Numanoid wrote:
MeldaProduction wrote:I'm going to be bold and say it's by far the most powerful reverb ever made
But power aint everything, sound is

Absolutely! But what if it sounds great and it's superpowerful as well?

Chandler: Exactly! I personally most like R (reverb) and CC (circular comb).

Sampleconstruct · Post by **Sampleconstruct** » Sat Dec 17, 2016 4:05 pm

Improvising with one of my Alchemy 2 patches straight into MTurboReverb which uses a custom preset with 2 LR modules.

caulixtla · Post by **caulixtla** » Sat Dec 17, 2016 8:17 pm

My favorite modules in MTurboReverb are a (allpass filter), an (nested allpass filter), v (modulating delay line), fl (low pass filter), and d (delay line). I also use l (e.g. l(4) to increase the signal by 4db) when I want the reverb to sustain longer — but be very careful with that!! The legendary Lexicon 224’s algorithms that I have seen use nothing more than a/an/v/fl/d/l with various topologies and sound really great.

To add to what Chandler says about a lot of allpasses diffusing the signal, Sean Costello has a deep technical discussion about that: https://valhalladsp.com/2011/01/21/reve ... artifacts/

Sample construct: I really like this video. I like how you use lr1 as an “input diffuser” (cn[[fh;fl];10a]) which is fed in to lr2 (reverb) to make a really nice relaxing wash. The playing is also really great in this video. It sounds very Vangelis like, even if the reverb has features (such as 4-line FDNs) which Vangelis’ Lexicon 224 reverb in the early 1980s did not have.

Sampleconstruct · Post by **Sampleconstruct** » Sat Dec 17, 2016 8:25 pm

caulixtla wrote:
Sample construct: I really like this video. I like how you use lr1 as an “input diffuser” (cn[[fh;fl];10a]) which is fed in to lr2 (reverb) to make a really nice relaxing wash. The playing is also really great in this video. It sounds very Vangelis like, even if the reverb has features (such as 4-line FDNs) which Vangelis’ Lexicon 224 reverb in the early 1980s did not have.

Thanks, I experimented around for about an hour this afternoon with allpasses until I found this combo and it sounded great. Programming this thing is becoming somewhat addictive

caulixtla · Post by **caulixtla** » Sat Dec 17, 2016 8:58 pm

In order to show that MTurboReverb can sound nice thickening up drum sounds, I have made this demo showing how an electronic drum machine sounds going through MTurboReverb, starting with reverb in the signal, switching to dry about 15 seconds in to the beat.

https://soundcloud.com/caulixtla/mturboreverb-drum-demo

Numanoid · Post by **Numanoid** » Sat Dec 17, 2016 9:07 pm

caulixtla wrote:an electronic drum machine

Are there any acoustic drum machines?

caulixtla · Post by **caulixtla** » Sun Dec 18, 2016 8:41 am

OK, I just submitted three presets. One I have already posted in the thread, but in this revision, the stereo imaging is improved:

a(0.7;11);a(0.7;23);a(0.7;9);a(0.7;19);swap;p[#an[swap;fl;a;fh;a;v;a]]

There is also (be careful here with the “l” parameter, or you will get runaway feedback!) a version of this algorithm with much longer sustain, for ambient soundscapes:

a(0.7;11);a(0.7;23);a(0.7;9);a(0.7;19);swap;p[#an[swap;fl;a;fh;a;v;a;l(3)]];swap;v;l(4)

Finally, for fans of 1980s snare drums, here is a MTurboReverb version of the classic AMS gated reverb sound:

st[v;20[a(0.36);fl;fh];v;#[a(0.36)];v;#[a(0.36)]]

To use the non-linear algorithm so it sounds 80s with snare and other drums:

* Make length 100ms.
* Make complexity 20. Increase complexity (or size) for a longer “gate”
* Reverb time is determined by size. Make size 25% to 35% when starting out, adjust as needed
* Delay order random, Delay min 0%, Delay max 6%, Delay focus 0%
* Turn off all early reflections

Soarer · Post by **Soarer** » Sun Dec 18, 2016 11:46 am

Thanks for posting your results and your algorithms caulixtla. I just tried your gated snare reverb and it sounds great. I made size 50% and it's cool that with default widening you get a wide stereo gated snare sound. I set it to -60% though which fits better in general.

caulixtla · Post by **caulixtla** » Sun Dec 18, 2016 1:06 pm

I have made a demonstration of the three algorithms I posted above, as well as a demonstration of this very simple algorithm:

p[#[v;9a]]

https://soundcloud.com/caulixtla/mturborvbdemo2wav

MeldaProduction · Post by **MeldaProduction** » Sun Dec 18, 2016 10:38 pm

Sampleconstruct wrote:Improvising with one of my Alchemy 2 patches straight into MTurboReverb which uses a custom preset with 2 LR modules.

Very well!

Scotty · Post by **Scotty** » Sun Dec 18, 2016 10:42 pm

Why yes there are....

Numanoid wrote:
caulixtla wrote:an electronic drum machine
Are there any acoustic drum machines?

Ah_Dziz · Post by **Ah_Dziz** » Mon Dec 19, 2016 1:36 am

MeldaProduction wrote:Ah_Dziz: Certainly! Bring it on, but please design it nicely . Ideally if such an active presete would do lots of different weirdness

To everyone: In the documentation I forgot to include one new module, so here it is:
F / Filter (frequency;type;Q;gain)

Filter lets you create a classic filter used in most equalizers. You should specify all of the required parameters, otherwise these will default to frequency=8000Hz, Q=0.7071 (neutral Q), gain=-6dB and type=lowpass6. The filter type parameter is self-explanatory can have one of following values: Peak, PeakAnalog, LowShelf, HighShelf, LowPass, HighPass, LowPass6, HighPass6, BandPass, Notch.

Example: <example>f(1000)</example> = a 6dB/oct lowpass filter at 1000Hz. 6dB/oct filters don't have a resonance nor gain, so the 2 parameters, which haven't been specified are ignored.

Example: <example>f(2000;highshelf;2;-8)</example> = a highshelf filter at 2kHz with Q=2 and gain -8dB.

I'm currently rebuilding the algorithms I'm using for this odd stuff. I was learning when I realized how bizarre this could get so the first batch of stuff gets pretty insane on the CPU when you kick the modulation in. These filters will simplify matters greatly as I was having to do some crazy stuff to control runaway feedback that could have been achieved with some simple filtering. I'm shooting for a few active presets that can do a lots of wacky rhythmic stuff but still in a mostly random way. I basically built it for resampling. There's beautiful stuff in there but some of the more interesting things I've had come out of the speakers have only happened once.

Ah_Dziz · Post by **Ah_Dziz** » Mon Dec 19, 2016 4:19 am

Here's the first iteration of some made from scratch reverb algorithms. The piano reverb is actually a nice pretty reverb that works well on various sources and with the length dialed back and the ER/LR balance adjusted it does well on drums and more normal roomy stuff. The second one is 3 LR algorithms that self randomize as the music plays and has 4 Multicontrollers that drastically change the modulation that's going on. The preset on the drums is the kind of thing that I can do with this reverb and not with any others. Gonna make at least a few active presets in this vein with more efficient algorithms.

Listen to this: https://soundcloud.com/ah_dziz/turbo-ve ... overb-beta

this freaking thing is great!

Scotty · Post by **Scotty** » Mon Dec 19, 2016 5:32 am

Really nice sound design in this track. The spaces sound interesting. Bravo.

quote="Ah_Dziz"]Here's the first iteration of some made from scratch reverb algorithms. The piano reverb is actually a nice pretty reverb that works well on various sources and with the length dialed back and the ER/LR balance adjusted it does well on drums and more normal roomy stuff. The second one is 3 LR algorithms that self randomize as the music plays and has 4 Multicontrollers that drastically change the modulation that's going on. The preset on the drums is the kind of thing that I can do with this reverb and not with any others. Gonna make at least a few active presets in this vein with more efficient algorithms.

Listen to this: https://soundcloud.com/ah_dziz/turbo-ve ... overb-beta

this freaking thing is great![/quote]

MTurboReverb preset making action, let's make the ultimate reverb! ;)