Comments on: Manual: BeatDetect

By: Cerr

Cerr — Sat, 06 Feb 2010 19:36:08 +0000

Hi, i am trying to use the beatdetection with an audio live input from the linein. The line in Example works fine, and the Beat detection with an mp3 file works as well. But is it possible to use the beat detection with the linein? I cant get it to work.

By: ddf

ddf — Thu, 10 Dec 2009 03:48:31 +0000

BeatListener is a class only defined in the linked example. Follow the link to http://code.compartmental.net/minim/examples/BeatDetect/FrequencyEnergy/ and you will see that page has a link to a pde file with the BeatListener class. BeatListener is NOT a class that is included in Minim.

By: dot.sonic

dot.sonic — Thu, 10 Dec 2009 02:59:43 +0000

I’m getting “Cannot find a class or type named “BeatListener” in the example and my own code too.

Can anyone help?!

By: ddf

ddf — Tue, 17 Nov 2009 14:38:18 +0000

This is how the array accessed by isOnset(int) is created:

spect = new FFT(timeSize, sampleRate);
spect.logAverages(60, 3);
int numAvg = spect.avgSize();
fIsOnset = new boolean[numAvg];

The logAverages function is asking the FFT to compute the averages with a minimum bandwidth of 60 Hz and 3 bands per octave. I can’t do the math in my head right at the moment, but you should be able to figure out how many slots that is, considering the highest frequency band in the FFT is likely to be 22050 Hz.

Regardless, you bring up a good point: there is no way to query for how many onset slots there are. That should be fixed.

By: Stuart

Stuart — Tue, 17 Nov 2009 06:48:49 +0000

I am not clear on how the isOnset(int i) method works.

What is the maximum number of frequency bands? I assumed that the maximum is 32 since the paper you cite uses 32.

By: benjamin

benjamin — Sat, 19 Sep 2009 04:26:27 +0000

Hmmm, getting: Cannot find a class or type named “BeatListener” in the example and my own code.

By: Sabrina’s External Brain… | Week 7: Sound and Sound Input

Sabrina’s External Brain… | Week 7: Sound and Sound Input — Thu, 14 May 2009 04:21:01 +0000

[...] The read into beat detection http://code.compartmental.net/tools/minim/manual-beatdetect/ [...]

By: z3219928’s blog » Blog Archive » soooundd - multiWeek7

z3219928’s blog » Blog Archive » soooundd - multiWeek7 — Wed, 06 May 2009 04:00:28 +0000

[...] http://code.compartmental.net/tools/minim/manual-beatdetect/ [...]

By: Minim and Beat Detection | matthewbrown.net.au

Minim and Beat Detection | matthewbrown.net.au — Wed, 17 Sep 2008 12:04:33 +0000

[...] I was looking through the Minim documentation, I came across the built in BeatDetect class that analyses the audio input for beats. My understanding is that it looks for patterns in the [...]