Drag vertically in parameter value fields to change them. For example, vertically drag the value shown for a zone in the Tune column to change it. Alternatively, you can double-click in a field and enter a value, then press the Return key.
Zone parameters: New zones are automatically assigned a consecutive number.
Zone Mute button: Mute or unmute a zone.
Zone Name field: Displays the zone name. Double-click to enter a new zone name.
Audio filename pop-up menu: Displays the audio filename. Click to open a shortcut menu that contains the following commands:
Note: If at least one audio file is missing an extra column is shown to the left of the audio file column. Each missing file is marked with an exclamation mark icon. You can sort this column by clicking on the column header (exclamation mark icon). The column is visible only if there are missing audio files.
Load Audio File: Opens a dialog where you can select an audio file. Default Quickly create Sampler instruments from audio regions in Logic Pro.
Anchor field: Set a value to trigger playback of the sample earlier in the project. To explain further, on playback, Logic looks into the future and advances sample playback by the amount set in the anchor field. The sample is played earlier, so that the anchor sounds exactly on the downbeat of the note. The sample anchor is useful for instruments such as shakers that have a rhythmic anchor at a position after the beginning of the sample.
Note: The Anchor field value affects only sequenced playback of the sample. Live keyboard playing triggers the sample at the anchor point, so any sample data that precedes this is not played.
Loop parameters: You can control all aspects of zone loops with these options.
Loop ON/OFF button: Turn on to enable looping and to set other loop parameters.
Loop Mode pop-up menu: Choose a looping mode.
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 ON/OFF button: Turn on to continue playback to the end marker position after you have released the key—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.
(Loop) Start and End fields: Use to define the loop start and end points, allowing you to loop a portion of the audio file.
Tune field: Change the tuning of the looped portion of the audio file in cent increments.
Xfade (Crossfade) field: Use to define the crossfade time between the loop end and loop start points. In a crossfaded loop, there is no step between the loop end and loop start points. The higher the value, the longer the crossfade and the smoother the transition between the loop end and start points. This is especially convenient with samples that are hard to loop, and would normally produce clicks at the transition point—the join in the loop.
E. Pwr (Equal Power) ON/OFF button: Turn on to enable an exponential crossfade curve that causes a volume boost of 3 dB in the middle of the crossfade range. This fades the join between the loop end and start points at an equal volume level.
Note: The ideal settings for the Xfade and E. Pwr parameters depend on the sample material. A loop that cycles reasonably smoothly is the best starting point for a perfectly crossfaded loop, but a crossfaded loop does not always sound better. Experiment with both parameters to learn how, when, and where they work best.
Audio File Tail parameters: Use these options to add and control a sample that is added to the end of a zone. This is typically used to add a reverb tail, or a section of reversed audio, but you are free to use any audio material.
Name pop-up menu: Displays the audio file tail filename. Missing files are indicated with an icon in a column to the left. Click to open a shortcut menu that contains file handling commands.
Tune field: Tune the audio file tail.
Volume field: Set the overall output level of the audio file tail.
(Audio File Tail) Start and End fields: Set the audio file tail start and end points, respectively.
Download the guides:
Logic Pro User Guide: PDF
Logic Pro Effects: PDF