Apple Logic Pro 7.1 Manuel d'utilisateur télécharger pdf (Page 26)

Vocal Transformer

The Vocal Transformer offers three additional parameters in the 001/011 view.

• Glide—determines the amount of time the vocal transformation takes, allowing

sliding transitions to the set Pitch value.

• Grain Size—The Vocal Transformer’s algorithm is based on granular synthesis. The

Grain Size parameter allows you to set the size of the grains, and thus affect the

precision of the process. Experiment to find the best setting. Try “Auto” first.

• Formants menu—Enables you to determine whether the Vocal Transformer plug-in

processes all formants (“Process always” option), or only the voiced ones (“Keep

unvoiced formants” option). The “Keep unvoiced format” option leaves the typical

sibilant noise of a vocal performance untouched. For some applications, this setting

will produce a more “natural” sounding transformation effect.

New BPM Counter

The BPM Counter is a useful plug-in that analyzes the tempo of an audio track and

displays it as a numeric value. As soon as the plug-in is inserted in a track, the

intelligent detector circuit analyzes the dynamic events in the signal.

The detector circuit looks for any transients in the input signal. Transients are very fast,

non-periodical sound events in the attack portion of the signal. The more obvious this

impulse is, the easier it is for the BPM Counter to detect the tempo. As a result,

percussive drum and instrumental rhythm tracks (basslines, for example) are very well

suited for tempo analysis. Pad sounds are a poor choice.

The LED shows the current state of the analysis process. If the LED flashes, the circuit is

performing a tempo measurement. When lit, analysis is complete, and the measured

tempo is displayed. The measurement range is from 80 to 160 beats per minute and the

measured value is displayed with an accuracy of one decimal place.

The BPM Counter also detects any tempo variation in the signal and tries to analyze it

accurately. If the LED starts flashing, the BPM Counter has detected a tempo variation

that has deviated from the last received (or set) tempo. As soon as a new, constant

tempo is measured, the LED will be solidly lit.

Clicking the LED resets the BPM Counter.

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Apple Logic Pro 7.1 Manuel d'utilisateur Page 26