BioAcoustica: Tape speed conversion table
Reel-to-reel (spool) tape machines operate at a number of standard speeds. This table can be used to provide playback speed multipliers for audio conversion software (such as sox) to correct for using a playback machine not capable of the correct speed. Such conversion will have effects on audio quality, so recording at an appropriate bit rate is essential.
From
| To | |||||
| 2.38 | 4.76 | 9.53 | 19.05 | 38.1 | 76.2 | |
| 2.38 | 1 | 0.5 | 0.25 | 0.125 | 0.0625 | 0.03125 |
| 4.76 | 2 | 1 | 0.5 | 0.25 | 0.125 | 0.0625 |
| 9.53 | 4 | 2 | 1 | 0.5 | 0.25 | 0.125 |
| 19.05 | 8 | 4 | 2 | 1 | 0.5 | 0.25 |
| 38.1 | 16 | 8 | 4 | 2 | 1 | 0.5 |
| 76.2 | 32 | 16 | 8 | 4 | 2 | 1 |