One hundred and thirty-eight bpm in milliseconds.
| Musical note name | Duration in milliseconds |
|---|---|
| octuple note (8) | 13912 |
| quadruple note (4) | 6956 |
| breve (2) | 3478 |
| semibreve (1) | 1739 |
| minim (½) | 869.565 |
| crochet (¼) | 434.783 |
| quaver (⅛) | 217.391 |
| semiquaver (¹⁄₁₆) | 108.696 |
| demisemiquaver (¹⁄₃₂) | 54.348 |
| hemidemisemiquaver (¹⁄₆₄) | 27.174 |
| semihemidemisemiquaver (¹⁄₁₂₈) | 13.587 |
| demisemihemidemisemiquaver (¹⁄₂₅₆) | 6.7935 |
