Ableton Live - 9.0 Bedienungsanleitung PDF herunterladen (Seite 130)

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130 Audio Clips, Tempo, and Warping

Use the Preserve control to preserve divisions in the sample as boundaries when warping. For

the most accurate results, particularly with percussive material, choose Transients. This setting

uses the positions of the analyzed (or user-created) transients to determine warping behavior. To

preserve speciﬁc beat divisions regardless of the sample’s contents, choose one of the ﬁxed note

values. For some interesting rhythmic artifacts, choose large note values in conjunction with pitch

transposition.

The Transient Loop Mode chooser sets the looping properties for the clip’s transients:

Loop Off — Each segment of audio between transients plays to its end and then stops. Any

remaining time between the end of a segment and the next transient will be silent.

Loop Forward — Each segment of audio between transients plays to its end. Playback then

jumps back to a zero-crossing near the middle of the segment and continues looping until the

time when the next transient occurs.

Loop Back-and-Forth — Each segment of audio between transients plays to its end. Play-

back then reverses until it reaches a zero-crossing near the middle of the segment, and then

proceeds again towards the end of the segment. This pattern continues until the time when the

next transient occurs. This mode, in conjunction with the Preserve Transients selection, can often

result in very good quality at slower tempos.

The Transient Envelope slider applies a volume fade to each segment of audio. At 100, there is

no fade. At 0, each segment decays very quickly. Long envelope times can help to smooth clicks

at the end of segments, while short times can be used to apply rhythmic gating effects.

9.3.2 Tones Mode

Tones Mode serves well for stretching material with a more or less clear pitch structure, such as

vocals, monophonic instruments and basslines.

Grain Size provides rough control over the average grain size used. The actual grain size is

determined in a signal-dependent manner. For signals with a clear sense of pitch contour, a

small grain size works best. Larger grain sizes help avoid artifacts that can occur when the pitch

contour is unclear, but the trade-off can be audible repetitions.

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