PRESONUS S1 Artist 3.0 [83/307] Studio one reference manual

changing the pitch and overall sound of the original audio.

Timestretching and defining a file tempo are nondestructive, so they can be undone and redone. It is also possible to

switch Tempo modes for any Audio Track, on the fly. For example, switching to Follow or Don’t Follow from Timestretch

returns any timestretched Audio Event that Track contains back to its original state.

When timestretching, if the tempo is drastically changed (by about 30 bpm or more), the audio can become slightly

distorted. While this can lead to interesting effects, you should be aware of the limitation of this technology.

In Studio One, timestretching can occur automatically or manually. The following describes these functions.

Manual Timestretching

With manual timestretching, you can stretch an Audio Event independently of the Song tempo or audio file tempo.

To manually stretch an Audio Event with the Arrow tool, float the mouse cursor to the edge of the target Audio Event and

hold [Alt]/[Option] on the keyboard. The Timestretch tool appears, allowing you to click on the edge of the Event and drag

left or right to timestretch the Event, making it shorter or longer In this case, the length of the Event changes, using the

Speedup factor, but the pitch of the audio the Event contains remains the same. Only the Event that you selected for

timestretching is affected.

Speedup factor is a timestretching function for making an audio clip shorter or longer while maintaining its pitch. Values

greater than 1 decrease the length of the clip, while values less than 1 make the clip longer. This is used to stretch audio

Events when you do not wish to define a tempo for the original audio clip, which would affect all Events associated with that

clip. The Speedup factor can be entered in the Event Inspector.

Automatic Timestretching

Automatic timestretching is based on the relationship between the Song tempo and the audio file’s tempo.

Each Audio Track has a Tempo mode that controls the behavior of the Events on the Track, based on the Song tempo.

The Tempo mode can be selected in the Track Inspector. The following modes are available:

Don’t Follow Events on this Track are independent of the Song tempo. They are never moved or stretched auto-

matically.

Follow The start positions of Events on this Track are tied to the musical grid. Thus, the Events move when the

Song tempo changes but they are not stretched.

Timestretch Event start positions follow the Song tempo, as in Follow mode. In addition, the Events are

stretched to fit the Song tempo.

Audio File Tempo Information

For automatic timestretching to work as described, Studio One needs to know the original tempo of an audio file. The

software can then calculate how to stretch the file to fit the Song tempo. Many audio loops have this information encoded.

Files without tempo information are not timestretched, even if the Track’s tempo mode is set to Timestretch.

Studio One offers two ways to define or change the original tempo information of an audio file.

If the original tempo for an Audio Event is unknown, the Arrow tool Timestretch function can be used to manually fit the

Audio Event to a specific length of time (bars and beats, etc). To do this, set the Tempo mode of the Track to

“Timestretch.” Float the mouse cursor to the edge of the target Audio Event and hold [Ctrl]+[Alt]/[Cmd]+[Option] on the

keyboard. The Define Tempo tool appears, allowing you to click on the edge of the Event and drag left or right to stretch it.

In this case, the tempo for the original clip is set based on the musical length to which the Event is stretched, and all Events

in the Song that use this original clip are updated.

If the original tempo for an Audio Event is known but is not encoded in the original file that the Event references, you can

easily set the file tempo for the Event in the Inspector. Click in the File Tempo box, type in a new value and press [Enter] on

the keyboard to enter a new file tempo. If the corresponding Audio Track’s Tempo mode is set to Timestretch, entering a

new value in File Tempo stretches all Events in the Song that use this original clip, based on the entered tempo value.

76│Studio One Reference Manual