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Thread: Beatcounting software - percentage formula required please.

  1. #1
    Rage Reset

    Beatcounting software - percentage formula required please.

    Sorry for the new thread but I couldn't find all the answers I need - I did look.
    I'm using beat counting software to mix dance music and I need a formula whereby I can determine what Beats Per Minute percentage value to enter to make two songs of differing speeds match.

    For example, I have a song which is 140.8 BPM and another which is 143 BPM but of course when I add the songs to the mix they are both presented at 100% of their BPM and if played together sound like a pair of boots in a tumble dryer; I need to know what percentage to play the second song at so that it will match the first. In the above case, the song which is 140.8 needs to be played at 101.36% BPM. How do I know this? Because I matched it manually through trial and error (and having a DJ's ear) - its a slow, painful process which can hopefully be rendered unneccessary by a clever mathematician with a formula.

    I suspect that creating this formula is fairly straightforward for one who knows their numbers, but alas I must admit it's beyond my meagre capabilities.
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  2. #2
    MHF Contributor
    Apr 2005
    140.8 BPM to match 143 BPM, you played the 140.8 BPM at 101.36 percent?


    Umm, let us see.
    140.8 BPM and 143 BPM to play together, in tune, but the 143 BPM rules.
    143 over 140.8

    143 over 140.8 ?
    143 / 140.8 ?
    Why, that is division in Math.
    143 divided by 140.8 = 1.0156
    And in percentage, 1.0156 is 101.56 percent!
    Oh, my...
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  3. #3
    Site Founder MathGuru's Avatar
    Mar 2005
    San Diego

    Thumbs up

    Interesting problem, thanks for the post.

    For future problems simply divide 1 bpm by the other bpm and that will give you the percentage speed to play the second one to match the first.
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