10.6

328Logic Pro Instruments
• Crossfade marker: Drag the gray crossfade marker to adjust the length of the crossfade
at the beginning and end of loop boundaries. Crossfading helps to smooth out audible
glitches at the point where the loop cycles across the loop end and start points.
• Root Key pop-up menu: Choose a keyboard note value that is used to play the sample
at the original pitch. Keys below this will play the sample at a lower pitch and slower
speed. Keys above this will play the sample at a higher pitch and faster speed.
• Tune field: Drag vertically or double-click and type to set a tuning value for the
assigned root key in Cents (1/100th of a semitone).
• Playback button: Enable forward or reversed playback from the start marker position,
inclusive of loop playback.
• Loop mode pop-up menu: Choose a loop playback mode.
• No Loop: Turn off looped playback. This hides loop markers and crossfades from the
waveform display.
• Forward: Playback cycles from the loop start point to the loop end point while you
hold a key.
• Reverse: Playback cycles from the loop end point to the loop start point while you
hold a key.
• Alternate: Playback continuously cycles from the loop start point to the loop end
point, then switches from the loop end point to the loop start point, while you hold a
key.
• Play to End on Release: When you release a key, the loop plays to the loop end
marker position, and playback smoothly continues to the sample end marker
position—provided that the amp release time is long enough for the audio portion
after the loop to be audible. This feature is useful for allowing the natural decay of
a sampled acoustic instrument to be heard during the envelope release phase, for
example.
• Flex On/Off button: Turn Flex mode on or off. If Flex mode is turned on, an audio sample
is played at its original speed for all note pitches. See Use Flex in Logic Pro Quick
Sampler.
• Follow Tempo button: When Flex mode is active, turn on to follow the project tempo.
Tip: The Derive Tempo from Loop Length command in the Action pop-up menu
calculates a tempo for the audio file based on the Loop Length. If using the Follow
Tempo button does not yield the desired results, you can choose this option to calculate
a revised tempo at which the loop is aligned to the beat.
• (Flex) Speed pop-up menu: When Flex mode is active, choose a playback speed division
or multiplication value.
Tip: Flex Speed is also available as a modulation target.