sound waves...

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sound waves...

Postby sampleandhold » Tue Sep 09, 2003 7:56 am

i was wondering, how many of you guys do, or have done this?

take parts of different wave forms and chop them up and paste them together. like for instance, just only a few minutes ago, i took the start of a triangle wave, copied just that section of it, then took just the upper most section of a square wave, copied that section of it, and pasted the two pieces together, and looped it. It actualy had a interesting sound. and best of all, there was no clicking what so ever, even though i copied from above the zero crossings. what i ended up doing was duplicating the wave three times and detuning two of the waves from the third, then ran it through a low pass fitler and now i have a kind of reesey type sound bass line.

the only problem that i seem to come across is tuning. because the cycle of the wave is a combination of two parts of other waves, i ended up with a slightly larger cycle then what i started with. and the emu's tuning capabilities are not suffcient for perfect tuning. I ended up being about a whole step off from the typical A4 set up that i use when i make sounds. It is still out of tune compared to a sine wave, but it you would have to hold the key for about five seconds before you start to hear any evidence of the sound being out of tune. so i figured that is good enough.

just wondering if anyone has done this yet, and if they have had any really good success with it. i seemed to get lucky this time. I wonder if this is considered granular synthesis (did i spell that right?)

i could post the cycle up, but i figure you guys could figure it out in the end. oh and before i go, taking, for example, just the top of the square wave cycle doesn't yield any interesting results, except a weak high pitched signal. sort of the same kind of sound you get by making a really small loop.
"{jU$t-n3Rv0U$-N-+h3-@Ll3y-W@y}"
sampleandhold
 
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Postby MindMech » Tue Sep 09, 2003 4:11 pm

You can definitely get some interesting results doing things like that, although personally I would take an entire cycle of each waveform so you get an on-off effect and the waves retain their length.

It's not granular synthesis. It's just messing about with waveforms. I suppose if you took thousands of waveform chunks and cut them up and re-combined them, that might qualify...

For more info on granular, check out this webpage:
http://music.calarts.edu/~eric/gs.html
MindMech
 
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