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Chapter 17
Looping
Sound Forge® Pro software is an excellent tool for creating loops and provides the perfect compliment to the revolutionary ACID® line of
loop-based music creation tools.
Creating loop regions in files is useful only when you intend to transfer the files to a hardware sampler that supports the loop regions.
Loops
A loop is a sample or region in an audio file that is repeated during playback. Samples are finite and frequently very short in length.
Therefore, they must be repeated (or looped) to create longer or sustaining sounds.
Note:
Loops can also be used to repeat entire sections of music, although the Playlist is better suited to this purpose. For more
information, see Using the Playlist on page 130.
Sustaining and release loops
A sound envelope contains four elements: attack, decay, sustain, and release.
Attack
Decay
Sustain
Release
Typically, the sustain portion of the envelope is looped to lengthen the duration of a sound. This is referred to as the sustaining loop.
While sustaining loops are useful, it is frequently necessary to create a second loop, taken from later in the envelope. This allows you to
reproduce longer, more complex sounds, such as a piano chord struck with the sustain pedal depressed. This second type of loop is
referred to as the release loop.
Creating a sustaining loop
1.
Open the Drumhit.pca file and create a selection containing the snare hit at the beginning of the waveform.
2.
With the Loop Playback button ( ) selected in the transport bar, click the Play Normal button ( ) on the playbar to preview the
loop.
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