u-he

FarleyCZ · Post by **FarleyCZ** » Mon Mar 07, 2011 1:25 am

Hi all.

I had a little idea few days ago. Imagine noise. Now I'd need to be able to turn the noise on and of within periods of oscilator. In other words modulate volume of the noise by oscilator waveform.
I know, there was a theme about AM, but you guys added signals, which I didn't get. I'd expect multypliing. Which is ringing which I tried, but somehow it reacted just on the half of the waveform of modulating oscilator, which was wierd.
Any other ideas?

Cheers.

Urs · Post by **Urs** » Mon Mar 07, 2011 1:46 am

You can simply use the ringmodulator and an oscillator.

However, all waveforms in the oscillator a dc-blocked. So you have to have some silence (flat line in the middle) and some equally loud portions above and below that line. Here's an idea for that:

Code: Select all

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A waveform that looks like that is perfectly DC-neutral, so the flat line in the middle is indeed flat. Thus if you ringmodulate noise with this, the noise will be turned on and off twice a cycle. Lower the oscillator by an octave and you have noise turned on and off exactly once per cycle.

Note that noise doesn't care for sign. Noise multiplied by +1 or -1 doesn't make any audible difference - it's still just random noise.

Urs

FarleyCZ · Post by **FarleyCZ** » Mon Mar 07, 2011 10:06 am

Urs wrote:However, all waveforms in the oscillator a dc-blocked.
...
Lower the oscillator by an octave and you have noise turned on and off exactly once per cycle.

Yesssss, thats what I didn't realize. Thank you very much!

bmrzycki · Post by **bmrzycki** » Mon Mar 07, 2011 4:08 pm

Interesting idea! I made a patch using this technique if anyone's interested.
http://www.u-he.com/PatchLib/tmp/BR_Defender_Death.zip

FarleyCZ · Post by **FarleyCZ** » Mon Mar 07, 2011 5:30 pm

Cooooool! Sound's like combination of sci-fi laser blast and step in the snow!

3ee · Post by **3ee** » Mon Mar 07, 2011 5:36 pm

bmrzycki wrote:Interesting idea! I made a patch using this technique if anyone's interested.
http://www.u-he.com/PatchLib/tmp/BR_Defender_Death.zip

Some nice punch going on (disable delay to notice).
Yep, the tone sounds like boots in snow! (LFO4 rate slow as walking rate + VCF5 LP to isolate the sound)

bmrzycki · Post by **bmrzycki** » Mon Mar 07, 2011 6:34 pm

Glad you guys liked it. I found digital noise to be the most interesting with this method and the wedge shaper really boosted that lovely crunchiness. I'm pretty sure the original defender sound was done with a lo-fi pulse wave but I still think this captures the spirit of the sound.

Thanks for the interesting audio diversion, I hadn't really experimented with ringmod before this and the AM example.

Howard · Post by **Howard** » Mon Mar 07, 2011 10:05 pm

Urs wrote:...you have to have some silence (flat line in the middle) and some equally loud portions above and below that line.

FMO in "quadric sine" mode does this right "out of the box".
BTW: Why is it that if I take a day away from KVR, that's precisely when all the interesting posts arrive!

FarleyCZ · Post by **FarleyCZ** » Tue Mar 15, 2011 1:56 am

Howard wrote:
Urs wrote:...you have to have some silence (flat line in the middle) and some equally loud portions above and below that line.
FMO in "quadric sine" mode does this right "out of the box".
BTW: Why is it that if I take a day away from KVR, that's precisely when all the interesting posts arrive!

Mr. Murphy is the one to punch.

Thx for the FMO tip, gonna try.

u-he

KVR Audio

Help with idea for patch please.