User guide

488 Chapter 19 Quantizing MIDI Events
 Attack Range (ms): This tells Logic Express how long the attack phases of the sounds
in the audio material are. As examples of how you might use this parameter; drum
and percussion instruments have short attack times of less than 20 ms, while string
instruments have longer attack phases. The best values for the majority of
instruments are usually between 5 and 40 ms; with most around 20 ms.
 Smooth Release (%): This parameter is specifically designed to process audio material
that contains sounds with a long release or reverb tail. This makes it easier to convert
these sounds into suitable quantization points. The value you choose here should
generally be between 0 and 5%, except when processing passages that contain
sustained notes, distorted guitars, or similar sounds.
 Velocity Threshold: This parameter sets the threshold level. All signals that fall below
this value are ignored. In most cases, you should choose a value of 1, except when
processing very dense, loud material with soft background noises.
 Basis Quantize: This function enables you to add artificial trigger points at positions
where there are no trigger points present. Groove templates created with this
method are suitable in situations where you need more quantization points than are
contained in the audio material. The automatic identification of trigger points in the
audio material is not affected by use of this parameter.
 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 quantized with an Audio-to-MIDI groove template) at
the same time as the original audio material. You should be able to compensate for
this effect by using settings between –20 ms and 0 ms.