Varispeed provides a way to speed up or slow down the entire project, similar to the original varispeed feature of tape machines. The most practical use for this option is checking how a project might sound at a faster or slower tempo, and for practicing or recording a performance at a lower speed.
In Logic Pro for Mac, you can speed up or slow down a project between −50% (half the original project tempo) and +100% (double the original tempo).
When Enable Complete Features is selected in Logic Pro > Settings > Advanced, the Varispeed feature is available in the control bar.
In Logic Pro, click the Varispeed button in the control bar.
Note: If you don’t see the Varispeed button in the control bar, Control-click the control bar, choose Customize Control Bar and Display from the shortcut menu, choose Custom from the LCD pop-up menu, then select the Varispeed checkbox.
In Logic Pro, click the upper part of the Varispeed display in the control bar, then choose one of the following:
Speed Only: Use to pitch shift the master output signal to balance the pitch change caused by varispeed. Only the speed changes, not the pitch.
Varispeed (Speed and Pitch): Use to emulate classic tape varispeed, where the pitch changes to reflect the speed change.
Varispeed and MIDI: Use to emulate classic tape varispeed (speed and pitch) and simultaneously transpose External MIDI tracks, quantized to semitones, so they sound at the same pitch as the project.
In Logic Pro, click the unit of measurement (%, bpm, st, Hz) in the lower part of the Varispeed display in the control bar, then choose one of the following:
Percentage (%): Displays the varispeed value as a percentage of the original tempo.
Resulting Tempo (bpm): Displays the resulting tempo, dependent on the current tempo, which changes along with any tempo changes in the project.
Note: The Tempo display in the control bar always shows the original tempo value.
Detune (st): Displays the varispeed pitch change in semitones and cents.
Tuning Reference (Hz): Displays the varispeed value according to tuning reference.
Drag vertically on the value to adjust it, or double-click and enter a new value.
When Enable Complete Features is selected in Logic Pro > Settings > Advanced, the Varispeed feature is available in the control bar.
