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Audio processing and functions
Time Stretch
This function allows you to change the length and “tempo”
of the selected audio without affecting the pitch. The dia-
log contains the following parameters:
Define Bars section
In this section, you set the length of the selected audio
and the time signature:
Original Length section
This section contains information and settings regarding
the audio selected for processing:
Resulting Length section
These settings are used if you want to stretch the audio to
fit within a specific time span or tempo. The values will
change automatically if you adjust the Time Stretch Ratio
(see below).
Seconds Range section
These settings allow you to set the desired range for the
time stretch.
Time Stretch Ratio section
The Time Stretch Ratio determines the amount of time
stretch as a percentage of the original length. If you use
the settings in the Resulting Length section to specify the
amount of time stretch, this value will change automati-
cally. The possible range depends on the “Effect” option:
• If the “Effect” checkbox is deactivated, the range is 75–
125%.
This is the preferred mode if you want to preserve the character of the
sound.
• If the “Effect” checkbox is activated, you can specify val-
ues between 10 and 1000%.
This mode is mainly useful for special effects, etc.
Algorithm section
Here you can choose a preset for the Realtime algorithm.
This is the algorithm used for the realtime time stretching
features in Cubase AI. The Presets pop-up contains the
same presets as found in the Algorithm pop-up in the
Sample Editor.
Merge Merges both channels on each side for mono sound.
Subtract Subtracts the left channel information from the right and
vice versa. This is typically used as a “Karaoke effect”, for
removing centered mono material from a stereo signal.
Option Description
Bars If you use the tempo setting (see below), you can specify
the length of the selected audio here, in bars.
Beats If you use the tempo setting, you can specify the length of
the selected audio here, in beats.
Sign. If you use the tempo setting, you can specify the time sig-
nature here.
Option Description
Length in
Samples
The length of the selected audio, in samples.
Length in
Seconds
The length of the selected audio, in seconds.
Tempo in BPM If you are processing music, and know the actual tempo
of the audio, you can enter it here as beats per minute.
This makes it possible to time-stretch the audio to an-
other tempo, without having to compute the actual time
stretch amount.
Option Description
Option Description
Samples The desired length in samples.
Seconds The desired length in seconds.
BPM The desired tempo (beats per minute). For this to work,
you have to know the actual tempo of the audio, and
specify this (along with time signature and length in bars)
in the Original Length section to the left.
Option Description
Range Allows you to specify the desired length as a range be-
tween two time positions.
Use Locators Clicking the diamond-shaped button below the Range
fields sets the Range values to the left and right Locator
positions, respectively.