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Example https://www.dropbox.com/s/b8lzs3mwaht6voq/strumming%201.mp3?dl=0

I know the pattern is DDDDDDDD with accents but I cant figure out the bpm

I know there's the tapping method but I need someone to eli5 how to do that

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    There really isn't enough to go on with that short recording. But just tap and count. – Tim Jan 4 at 17:20
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There are several metronome apps that allow you to tap a tempo on the screen and it will analyze the taps and tell you the bpm. You can also use a metronome and trial end error to figure out a tempo as well, just run it to the music and speed up and slow down the metronome till it matches pretty closely.The beats probably won’t line up exactly but you can get a good idea this way.

The harder part is determining what the beat is. If the song in question is in 4/4, how is it most natural to count 1,2,3,4? That will be your beat. If there is a snare drum backbeat on 2&4 that is a good clue. In your (very short!) example the guitarist is playing 8th notes in 4/4 time which means the beat is half the tempo of the steady guitar rhythm.

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  • Heres the full strumming youtu.be/6nVSLRNVC6k?t=33 – kian ツ Jan 4 at 18:08
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    @kianツ OK, as you can probably tell this song has a few different feels and tempos but the feel where you cued the video to is 8th notes like I said. Good luck! – John Belzaguy Jan 4 at 18:12
  • So do I just tap from where I cued the video to where he stops strumming? or just 10 seconds? – kian ツ Jan 4 at 18:13
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    @kianツ In this case the tempo is so brief before he goes to a rubato feel that your best bet is to get the tempo in your head and turn on a metronome and speed up or slow down till you find the match. The guitar plays an pattern of 8th notes accented on the 1st, 4th and 7th notes. Count these 8th notes as 1&2&3&4& and match the metronome to the numbers. – John Belzaguy Jan 4 at 18:20
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    @kianツ I just edited and clarified my last comment a bit. Hint: it’s in the neighborhood of 140-150. – John Belzaguy Jan 4 at 18:25
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  1. Tap along with the music seven times. Follow the beat, not the strumming pattern. That is, tap evenly. This strumming pattern emphasizes the first beat, the offbeat of the second beat, and the fourth beat. If you have trouble with that then you should consider concentrating on meter and rhythm before turning your attention to tempo.

    Measure the number of seconds between the first and last taps, which is the duration of six beats. Call this t. Calculate 360/t.

    The factor 360 results from multiplying 6 beats, the number of beats being measured, by the conversion factor of 60 seconds per minute. You can adjust this method accordingly. For example, if you have a longer sample of the piece, you could measure six entire measures. Depending on which beat you want to calculate, you can calculate 720/t to find the number of half note beats per minute (assuming the piece is in 4/4) or 1440/t to find the number of quarter note beats per minutes.

  2. Tap along with the music for ten seconds, counting the number of taps. Multiply by six. For greater accuracy, use 15 seconds and a factor of four, 20 seconds and a factor of three, and so on, but the longer the sampling period the greater the likelihood of tempo changes.

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