What do note numbers actually mean?

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1

What’s going on here?
Using note notation I get unexpected results in the logs.

play :c4 {note: 60.0}
sleep 1
play :d4 {note: 62.0}
sleep 1
play :e4 {note: 64.0}
sleep 1
play :f4 {note: 65.0}
sleep 1
play :g4 {note: 67.0}
sleep 1
play :a5 {note: 81.0}

What I don’t understand is why aren’t the frequencies of the notes linear?
When it says c4 is 60, what does that mean its not 60hz…

Middle C aka c4 is 256Hz… D4 is 294Hz, E4 is 330Hz, so what are 60, 62, 64…. actually
signifying?

2

Those are the numbers assigned to notes in the MIDI standard.
You can get the corresponding frequencies using the midi_to_hz command.

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