Hi All,
I am working on a project in which I would like to have the tempo of a DAW (Ableton, FL Studio, etc) set by the clapping of an audience. Not sure how to approach tackling the problem. Any and all help is appreciated.
Thanks.
Very easy to do (i did a similar thing , where I used a microphone to create gestures to control an multitouch DJ application, see a small paper in [1] ).
In my approach I used gesture templates, but since all you want is "tapping" (or claping) you are just looking for "peaks" in amplitude analysis. So:
mic -> pd -> "attack detection" -> hit a bang that will set the tempo -> compute tempo in BPM -> build an OSC message and ship it to a port, where the ardour/DAW will listen.
Now "attack detection" in PD can be performed in various ways, one cool way is to use bonk~ to detect attacks (see Miller's paper in [2]) or on a simpler level you can analyse the signal manually with env~.
Computing the "tempo" is very easy, you just need to measure the time between to bangs. And convert that to BPM (beats per minute, thus 60 seconds). There's a patch here in the list that does that, I remember talking about that here.
The final stage is simple, "Sending the OSC" message, just see the help patch of the packOSC and other OSC-related externals, they supply examples. Also João Pais, has so nice information on controlling Ardour via pd in here [3] and he has a patch for it.
About building and shipping the OSC message
[1] http://dl.dropbox.com/u/7329207/PedroLopesDTW-based_RecOPad2010.pdf [2] http://www-crca.ucsd.edu/~tapel/icmc98.pdf [3] http://puredata.info/Members/jmmmp
hope this helps, Pedro On Wed, Dec 1, 2010 at 5:55 AM, Paul Winchester pww35@cornell.edu wrote:
Hi All,
I am working on a project in which I would like to have the tempo of a DAW (Ableton, FL Studio, etc) set by the clapping of an audience. Not sure how to approach tackling the problem. Any and all help is appreciated.
Thanks.
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On Wed, Dec 01, 2010 at 05:08:49PM +0000, Pedro Lopes wrote:
Now "attack detection" in PD can be performed in various ways, one cool way is to use bonk~ to detect attacks (see Miller's paper in [2]) or on a simpler level you can analyse the signal manually with env~.
One very awesome thing about [bonk~] is that you can ask it to 'learn' certain attack sounds. So you could just have it listen out for the group-clap sound specifically.
Chris.
Yep. Bonk~ is amazing, see the help patch and you can train the "classifier" do detect your "instrument" sounds. Then it will report a number for each instrument in the output format, the number of the instrument will follow the order in which you trained the bonk~ object. :)
On Thu, Dec 2, 2010 at 2:45 AM, Chris McCormick chris@mccormick.cx wrote:
On Wed, Dec 01, 2010 at 05:08:49PM +0000, Pedro Lopes wrote:
Now "attack detection" in PD can be performed in various ways, one cool
way
is to use bonk~ to detect attacks (see Miller's paper in [2]) or on a simpler level you can analyse the signal manually with env~.
One very awesome thing about [bonk~] is that you can ask it to 'learn' certain attack sounds. So you could just have it listen out for the group-clap sound specifically.
Chris.
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Chris McCormick -
Paul Winchester -
Pedro Lopes