396
The time/pitch stretch parameters are as follows:
The Time and Pitch parameters can be set by typing numbers in the appropriate
boxes, or by dragging the sliders or the crosshair in the graph. Holding Shift while
dragging the crosshair snaps the crosshair to the nearest axis: X (time), Y (pitch),
or the diagonal (equal time and pitch). Diagonal values on the graph can be
processed very quickly and with very high quality, but have the trade-off that
changing pitch does not preserve duration, and vice versa.
Parameter/
Option...
Meaning...
Time (%) The new length of the audio clip, as a percentage of
the length of the original clip.
Pitch The amount by which the pitch is changed, in
semitones.
Source Material The type of audio data. Selecting an option sets
recommended values for the Block Rate, Overlap
Ratio, Crossfade Ratio, Accuracy, and Algorithm
parameters.
Block Rate (Hz) Used to calculate the size of the data “blocks”
processed by Time/Pitch Stretch. Lower values lead to
larger block sizes. If the material to be processed is
generally less percussive or lower in pitch, using a
lower block rate will make the algorithm operate more
efficiently.
Overlap Ratio The amount of overlap between consecutive blocks.
Crossfade Ratio The crossfade amount for the blocks.
Accuracy The accuracy of the calculations. Normal is good for
most sounds. High accuracy gives slightly better
quality, but takes longer to process.
Algorithm The algorithm used for pitch stretching. The MPEX
algorithm is the default. Select Normal if you want to
use the same algorithm used by previous versions of
SONAR.
To Next Page
Loading...