Apple Logic Pro 9 - Manual (Page 588)

Setting “Audio to Score” Parameters
Here are the parameters in Audio to Score. You may need to experiment with different
parameter values, and even make several attempts to determine the optimum settings
for a particular audio recording.
• Preset: Contains various presets for “Audio to Score” parameters, which are suited to
specific types of audio material. In addition to 11 presets, there are also 4 User presets.
• Granulation: Determines the time span of louder components in the audio material.
Logic Pro uses these peak signals (or transients) to discriminate between notes that it
should—or should not—analyze. The most useful values are usually between 50 and
200 ms, depending on the tempo of the audio material.
• Attack Range: Determines a suitable attack phase length for the audio material. For
example, drum and percussion instruments have short attack times (less than 20 ms),
whereas string instruments have longer attack phases. The best values for most
instruments are usually between 5 and 40 ms, with most around 20 ms.
• Smooth Release: Specifically designed to process audio material that contains sounds
with a long release or reverb tail. This makes it easier to convert these sounds to notes.
The value you choose here should generally be between 0% and 5%, except when you
are processing passages that contain sustained notes, distorted guitars, or similar
sounds.
Note: The quality of “Audio to Score” results will benefit from non-legato performances.
Therefore, you should try to avoid reverb or release tails in your audio material, or at
least keep them to a minimum.
588 Chapter 17 Editing Audio in the Sample Editor