BPM values are slightly below the actual values

[juandmi]

Thanks Adam for this great repository and for sharing it with everyone.
I compiled it and found that the BPM values are most of the time a bit lower (1 - 4) than the actual values.
You can find the details of my approach here.
https://github.com/juandmi/BTrack/blob/master/BPMCalc/README.md
It would be great if you could check and tell me if I'm doing something wrong or if this discrepancy is normal.

[juandmi]

Hi Adam, thanks for your mail. That sounds like a plausible root cause although this would be a 10% deviation where my observed deviation is below 4%. Still worse checking it. Cheers, Michael From: ztsvvstz1337 ***@***.***> Sent: Freitag, 9. August 2024 19:09 To: adamstark/BTrack ***@***.***> Cc: Michael Mergell ***@***.***>; Author ***@***.***> Subject: Re: [adamstark/BTrack] BPM values are slightly below the actual values (Issue #21) Hi, this might be quite late, but I figured nowhere in the library is mentioned on what sample rate to use and there also isnt a way to set it (?) So my guess is your sample rate is ~48khz but BTrack expects 44khz, thus you'd have to resample first. - Reply to this email directly, view it on GitHub <#21 (comment)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEHJKN3XFKWQN2B3IIL55QTZQ TZTXAVCNFSM6AAAAABIJFZ2HGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDENZYGM4DC OJZHA> . You are receiving this because you authored the thread. <https://github.com/notifications/beacon/AEHJKNY2G7EKCQDDKR7V5HLZQTZTXA5CNFS M6AAAAABIJFZ2HGWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTU HZVM24.gif> Message ID: ***@***.*** ***@***.***> >

[adamstark]

Hi there,

There are some more detailed discussions on this here:

#19

Might be good to keep these tempo vs beat discussions to that thread :)

In short: the tempo estimation is a "rough guide" for the beat tracker, and not intended to be used by people as an accurate tempo value. I am working on making this clearer and perhaps providing a full tempo estimate also.