No input mixer

May 5, 2013 at 6:15pm

No input mixer


Anyone out there tried to simulate no input mixer behaviour in Max or have any sources they could point me to to explore that?



May 6, 2013 at 6:28pm

well, a no-input mixer setup involves analogue circuitry, since that’s your noise source to feed the whole thing.

Some simple noise and a ton of filters, delay and spades of feedback would be a great place to start.
The main thing to look at is separating the emulation of the sound, and the emulation of the mixer interface – remember that they *are* a work-around, and dedicated systems to reproduce those sounds might have a more useful interface.

To get specific, most no-input things start out as just sinewaves, tuned and then faded in and out – at that point we’re close to Berna, really:

May 8, 2013 at 3:42pm

Thanks, Wetterberg. I hear what you are saying about the mixer interface not being the best way of manipulating the sound. I will keep in this in mind. Now, by “spades of feedback” are you referring to….using envelopes to attenuate the feedback amount? Or? That Berna thing looks great, by the way. I have been working on some feedback using some delays and a sine wave. I’ll clean it up and post it. I would be curious to see what you would suggest.



May 8, 2013 at 5:50pm

I made a max patch around the idea many years ago.

It’s not really possible to do it in max since real digital feedback will eventually crash max (as I found out). So you have to use limiters in the feedback loop, and on the output.

Not to mention you have to use a delay, though now with gen, you can use a delay of 1 sample (instead of one vector as before).

May 20, 2013 at 12:39pm

Thanks, Rodrigo. It seems like a pretty fun patch.  Any instructions on how to look into the content, e.g. p feedback core?




May 20, 2013 at 1:09pm

The core is just 4 delays, with some control over a short delay time, and limiters in the patch of each.


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