17 Jul
2011
17 Jul
'11
1:27 p.m.
On 07/17/2011 10:41 AM, Rustom Mody wrote:
On Sun, Jul 17, 2011 at 1:21 PM, Philipp Überbacher
<hollunder(a)lavabit.com>wrote;wrote:
Exactly. Just take a short audio-sample (aka grain) and trigger it
repeatedly. Increase the trigger freq. (aka grain-speed) from 4 Hz -> 400Hz.
Search the net for granular-synthesis. Your use-case is not the typical
grain-synth application, but the principle is the same.
Excerpts from Rustom Mody's message of
2011-07-17 05:33:44 +0200:
You took me quite literally, [I did put the vibrate into quotes :-) ]
Let me spell out the experiment in more detail:
Say I have a rhythm in 4/4 time -- 4 even quarter notes, bar repeating every
second played by say a click. [What kind of click I am not very sure; sharp
with few harmonics would be best I expect] I am preparing to give a talk on the wider
ramifications of music.
One of the things I wish to demonstrate is that things that look
different
are merely analogs but at different scales.
eg if something vibrates at 400Hz we hear a sound of A-flat. If it
'vibrates' at 4 Hz we hear a beat.
In the same analogy a 2 vs 3 poly-rhythm (should?) change to a do-so
chord.
And so on.
I suggest you do some experiments before you give a talk. At 4 Hz you
won't be able to hear anything, you won't even be able to reproduce a
4 Hz sound with common speakers.
Now if there were some (realtime) way of sliding the
tempo from 1 sec to
millisec I expect the separate clicks would vanish into a hum at some stage.
This (and other such experiments) is what I want to demo.
Ive started looking at chuck.
How does it compare with puredata?
It's a bit of an apples vs oranges question.
the main difference: Chuck you program in text, pure-data you
graphically connect "objects" (if you know Max/MSP: pure-data is similar).
AFAIK, Chuck does not offer GUI elements - you'll need to implement the
slider via OSC or use a "text slider".
>> Is there some kind of software where I can
make a 4 Hz beat and pull a
>> slider or a freq text box entry until it sound like a A-flat note?
>
> puredata springs to mind, it's easy to use and has everything you need.
Indeed. Though chuck, supercollider, csound,... could all do the trick.
If you know neither of those. Pure-data is probably the easiest to get
started with.
http://www.timvets.net/video/grains.php will do what you want with Pd.
HTH,
robin
> Regards,
> Philipp
>
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