Why BPM is doubled or halved?

ming zhong -

Pro Metronome supports 2 modes for BPM calculation.

1. BPM is calculate by 1/4 note by default. Pro Metronome support this for drum players.

For example:

"BPM = 120, Time Signature = 4/4" will be as twice faster as "BPM = 120, Time Signature 2/2". Because the BPM of both of them is calculated by 1/4 note. In other words,  their will be 120 beat per minute, and one beat equals 1/4 note. so the 2/2 will be twice slower than 4/4 note.

You can just swipe left to the Setting interface and turn on the "Quarter Note per Minute", and it is not the default settings.


2. BPM is calculated by current note. Pro Metronome support this mode for classic, like piano players.

For example:

"BPM = 120, Time Signature = 4/4" will be as the same speed as "BPM = 120, Time Signature 2/2". Because the BPM of the previous one is calculated by 1/4 note, the last one is calculated by 1/2 note. That's said, The previous one means: their will be 120 beat per minute, and one beat equals 1/4 note. The last one means: their will be 120 beat per minute, and one beat equals 1/2 note.

It is the default setting. Or you can just swipe left and turn on the "BPM".

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