Apple Logic Express 9 - Manual (Page 574)

• Algorithm menu: You can choose the algorithm that is best suited to the audio material
you want to process:
• Version 5: Inherited from Logic 5, this algorithm can be used on most types of audio
material. It imparts a particular color on processed audio, which may be a useful
creative option.
• Any Material: Is able to handle most types of audio material.
• Monophonic: A specialized algorithm for monophonic material—an individual voice,
or brass or woodwind instrument, for example.
• Pads: Use on polyphonic material with harmonic content—choirs or string sections
are good examples.
• Rhythmic Material: Use on rhythmic material—can be drums and percussion, but
less obviously rhythm guitar, clavinet, and piano comp parts.
• Beats Only: Perfectly maintains the timing of percussive material. This algorithm
should be your first choice for all kinds of dry drum loops.
• Universal (default): This high-quality algorithm is able to handle any kind of audio
material and is generally recommended for most time-stretching tasks. The following
two algorithms can, however, deliver better results in cases where the audio material
exactly matches the outlined specifications.
• Complex: Choose this algorithm to obtain natural-sounding results when
time-stretching complex musical material—orchestral music or final mixes.
• Percussive: Perfectly maintains the timing of rhythmic material, making it a good
choice for drum loops and percussive, nonharmonic signals. In comparison to the
Beats Only algorithm, the Percussive algorithm is better suited for percussive material
that has been processed through a reverb (or contains a long tail). This may also
apply to percussive playing styles, such as staccato electric piano or clavinet parts.
Beats Only may be the better alternative for dry drum recordings.
Support of Third-Party Algorithms
Logic Express allows you to access the pitch shift and time stretch algorithms of the
following third-party plug-ins in the “Time and Pitch Machine”:
• Serato: Pitch ’n Time LE
• iZotope: Radius
Note: These algorithms can be accessed in the “Time and Pitch Machine” only if the
corresponding Audio Unit plug-ins are installed and authorized on your system.
574 Chapter 17 Editing Audio in the Sample Editor