Comments on: Easy BPM Calculation in Java

By: Peter Backx

Peter Backx — Tue, 17 May 2011 12:37:00 +0000

I honestly have no idea. At the time, I probably just used it so that I wouldn’t run into the limits of int or something. I’m not sure it matters?

I’ve currently started the project of going over and updated my old blogpost. This will be one of them (I just noticed the formula went missing and the original GameDev article is gone). I can’t promise you anything, but stay tuned (or bug me via the contact form if you want to place this one higher in the queue )

By: Sunch1ld

Sunch1ld — Wed, 11 May 2011 13:33:00 +0000

why are you using array of long in BPM2SampleProcessor ?

By: Peter Backx

Peter Backx — Wed, 01 Dec 2010 13:59:00 +0000

I’m not entirely sure. The project does very little error checking. I’m going to guess that it doesn’t find the mp3 file you want to analyze.
If that doesn’t help, can you send the rest of the stack trace?

By: Peter Backx

Peter Backx — Wed, 01 Dec 2010 13:58:00 +0000

Hi Julio,
Initially I had a few other modules calculating different characteristics. It’s been a while but I believe that’s what those classes were there for. I left them in since I think they will come in handy in the future.
It’s been a while since I worked in this project though.

By: Gish

Gish — Tue, 30 Nov 2010 08:15:00 +0000

I am getting an error “Exception in thread “main” java.lang.IndexOutOfBoundsException: Index: 0, Size: 0″ when running the main program. Can someone help me on this?

By: Julio_a_jimenez

Julio_a_jimenez — Mon, 29 Nov 2010 18:37:00 +0000

You have done an excellent job with this and I truly appreciate you sharing the code. When I was reading through the code i noticed that AveragingOutputAudioDevice and FileSampleProcessor were not being used in the code. Are these alternative classes, or have they been deprecated from the project as you’ve progressed along? Thank you!

By: Pp

Pp — Thu, 16 Sep 2010 11:54:00 +0000

To calculate the pitch from ex 128 bpm to 130 bpm, it´s easy.
But i need help writing a java app for mobile device.

My algorithm that works all the time is following [ 100 / (from bpm) 128 x (to bpm) 130 – 100 = 1,5625

exaple 2: 135 bpm to 145 bpm

” 100 / 135 x 145 – 100 = 7,40 ” Help me, anyone?! mail me patrick@spelagenten.se

By: Android, No-cost Development Platform – Streamhead

Android, No-cost Development Platform – Streamhead — Wed, 27 Jan 2010 21:29:47 +0000

[...] The last post on my current project already teasered the next step: taking it mobile. Considering the fact that I was programming the algorithm in Java, you might have concluded that it was going to be an Android application. If you did, you’re right. [...]

By: Peter Backx

Peter Backx — Mon, 11 Jan 2010 15:30:14 +0000

I've put this project on the back burner until I can get my hands on a Droid.
If you want to do real time calculation, you would just calculate the BPM according to the algorithm up until the data you have. Just shift the buffer in accordance to the real time output (you need a powerful enough processor to handle this, give the simplicity, I think that won't be a problem)

By: Extreme

Extreme — Fri, 18 Dec 2009 04:38:16 +0000

N?ce work. How can we both play the music and calculate instant bpm?