10.6

308Logic Pro Effects
• Auto Loop pop-up menu: Choose if loop points are automatically determined by Auto
Sampler, and if so, which method or algorithm to use.
• None: No auto-looping is performed.
• Search: The audio content is analyzed and the optimal loop in each sample is set,
without adding a loop crossfade. This is useful if the sampled sound contains
clearly looping sections.
• Search with XFade: The audio content is analyzed and the optimal loop in each
sample is set, with a loop crossfade also added to smooth the loop. This is useful
if the sampled sound contains clearly looping sections.
• Search with Rev XFade: The audio content is analyzed and the optimal loop in each
sample is set. A copy of the loop is automatically created, reversed and mixed with
the analyzed loop, and then a loop crossfade is added.
• Penrose Machine: Instead of searching for the best loop in each sample, a snapshot
of the sample is taken, and the Penrose Machine algorithm is used to create a DSP-
synthesized loop from the snapshot, which is inserted and crossfaded with the rest
of the sample.
The Penrose Machine is an algorithm in which the sonic properties of the current
loop are analyzed, and an artificial loop is created with the same sonic properties.
This algorithm is completely automatic and has no parameters, making it simple as
well as very powerful.
• Bidirectional: The loop area is cut, doubled in length (by being crossfaded into a
reversed copy of itself - hence the name “bidirectional”), and the resulting loop
is smoothly crossfaded back into the original sample.
• Auto Loop Start field and slider: Drag vertically to set the Auto Sampler search start
point for an automatic loop. The value indicates a percentage of the total sample
length/time. For example, in a 10-second sample with an Auto Loop Start value of
40%, Auto Sampler begins looking for an auto loop start point after 4 seconds.
• Auto Loop End field and slider: Drag vertically to set the auto loop end point. The value
indicates a percentage of the total sample length/time.
• One Shot checkbox: Turn on to save samples as non-repeating, “one shot” samples that
play to the end of the sample and stop, rather than loop.
When you trigger a one shot sample, it plays to the end of the file, regardless
of whether other samples are triggered. One shot samples are typically used
for percussion sounds and sound effects.