Apple Logic Pro 8 - Manual (Page 516)

516 Chapter 21 Editing Audio in the Sample Editor
Minimum Quality
You can choose between normal or high quality processing in this pop-up menu.
 The Normal setting is more tolerant of audio trigger points that aren’t perfectly in
tune, but it can generate wrong notes.
 When set to High, only audio trigger points of a clearly identifiable pitch will be
accepted and used. Indistinct trigger points are replaced by notes with a pitch of C3
and MIDI channel 3. These are labeled as an “undetected mark.”
When analyzing audio material containing clearly identifiable pitches, you will find that
good results can be obtained from either setting.
Time Correction
This parameter allows you to compensate for any time delays that may occur when
external samplers or synthesizers are triggered by MIDI notes. These time delays are
sometimes very noticeable, particularly if the connected device is playing a MIDI region
(that was generated by the Audio to Score function) alongside the original audio
material. You should be able to compensate for this effect by using settings between
–20 ms and 0 ms.
Your parameter settings are stored in the Logic Pro preferences.
A few tips on getting the best results from the Audio to Score function:
 You will only get good results with clearly identifiable, monophonic audio material.
Solo voices, strings, and piano can be easily analyzed, as can any recordings with
distinct pitches.
 Experiment with different parameter settings for data processing. Be prepared to
make several attempts, to determine the optimum settings for a particular audio
recording.
Using the Quantize Engine
This Digital Factory function allows you to use a MIDI region template (within reason),
to quantize an audio recording.
This is done by using a dynamic time compression or expansion algorithm. The
function is similar to the Groove Machine, except that the quantize template can reflect
values other than just 8th or 16th note swing grooves. Even user-defined MIDI grooves
can be used!