Random low-pass step filter

[3mpty]

Hi,
I'm trying to recrete a PAD-like sound I made for my KORG Triton into Zebra. You can listen to it at the beginning and at the end of this simple demo: http://soundcloud.com/paolomontesel/dri ... oments-wip.

On the Triton there's a nice "Random Filter" that is just a step filter with random cutoff frequency. I set up a random LFO in Zebra and used its output to set the Cutoff of a VCF, but it doesn't sound right...

EDIT:
The problem is the cutoff frequency is changed instanly from value to value so I get "clicks" in the output. Is there a way to solve this?

Hope I explained myself properly

Thank you very much in advance

[bmrzycki]

The problem is the cutoff frequency is changed instanly from value to value so I get "clicks" in the output. Is there a way to solve this?

Howdy 3mpty,
Sounds like you might have better results with the 'rand glide' (and not 'rand hold') LFO setting:

Hope that helps.

[3mpty]

Sounds like you might have better results with the 'rand glide' (and not 'rand hold') LFO setting:

Hope that helps.

Thank you for your answer The "rand glide" is not what I need. Rand Hold is the right LFO type but it should be able to "smooth" a bit the square waves it creates.

This is the best I can get, so far: http://dl.dropbox.com/u/16026295/SoundD ... ganPAD.mp3

It's different from my original sound, but it's getting better... I have to solve this "click" problem.

I also don't understand why the ADSR Envelope "Attack" parameter at max value is still too fast for some purposes (like ambient-like PADs).

[mcnoone]

You could try lowering the amplitude "amp", should smooth it out some what.
Y

[polyfonken]

Urs or someone else might prove me wrong (please do!) but to my knowledge it's damn near impossible to create a slide in your stepped s&h lfo with Zebra. That'd require either a smoothing/slew parameter for the lfo itself or (more handy) for the mod mapper. In a moment of stupidity I even tried creating a mod map with smooth steps and feeding the glide lfo through that but essentially that just quantizes the glide.

OT edit: putting another filter (6db midrange band-pass or a 12db low-pass, no resonance) after the modulated filter should help a bit with the clicking.

[jupiter8]

Try with another filter. I tried the XMF and did not have the problems you describe. Maybe the lesser ones are too optimized for their own good.
Quick demo i did in like 10 minutes:
http://dl.dropbox.com/u/15285948/02-110517_1711.mp3

EDIT: Changed to mp3,the wav was huge.

[3mpty]

Try with another filter. I tried the XMF and did not have the problems you describe. Maybe the lesser ones are too optimized for their own good.
Quick demo i did in like 10 minutes:
http://dl.dropbox.com/u/15285948/02-110517_1711.mp3

EDIT: Changed to mp3,the wav was huge.

Thank you guy, need to check out XMF... The mp3 you linked is exactly the effect I want to obtain
I'm only tinkering with Zebra right now to see (well, actually hear ) what it can do to decide if it is the right tool for me .

BTW, any idea about how to get a slower attack in the ADSR Envelope?

OT edit: putting another filter (6db midrange band-pass or a 12db low-pass, no resonance) after the modulated filter should help a bit with the clicking.

Tried that, it almost destroy all the s&h effect.

[jupiter8]

BTW, any idea about how to get a slower attack in the ADSR Envelope?

Try the 16sX setting. That'll give you 16 seconds. If you need even longer attacks use the MSEG instead. Don't know the upper limit but i scrolled to over a minute,then i didn't bother. That ought to do it.

[3mpty]

BTW, any idea about how to get a slower attack in the ADSR Envelope?

Try the 16sX setting. That'll give you 16 seconds. If you need even longer attacks use the MSEG instead. Don't know the upper limit but i scrolled to over a minute,then i didn't bother. That ought to do it.

Ok I'm stupid ahah Did not thought of using that parameter... Thank you again

[jupiter8]

Do take the time and read the manual. It is so deep there's stuff in there you don't know what they do even if you used for years. You can do so much stuff with just a single oscillator it's mind boggling. Try the oscillator FX ,that's tons of fun just waiting to happen.

EDIT: Here http://www.u-he.com/zebra/manual/
and here:
http://www.u-he.com/Zebra2_Zebralette_manuals.zip

[Howard]

Those two links are very different - the 2nd link (Beta) is the one to go for, it's much more detailed and up-to-date!

[xh3rv]

Had some luck composing random-ish 'slew'-ed MSEG with a long period, random global LFO, for getting an eventual modulation along these lines - S&H with a little less discrete jumping. http://www.box.net/shared/cqht4u46gz

Using the MSEG here is a little more rhythmic than a purely random LFO might be, but it's the kind of thing the ear wouldn't correlate consciously so I'll declare it a Special Effect!