10.6

53Logic Pro Instruments
• Tap Spacing knob: Set the spacing between the specified number of taps. Values are
shown as a percentage of the overall sound duration. Set to 100% to evenly space taps
across the entire sound duration. Set to 50% to trigger more closely-spaced taps that
start at the halfway point of the sound. Set to zero to trigger taps in quick succession at
the sound end point.
• Stereo Offset knob: Offset the stereo position to create a wider sound. The source
Stereo button must be on for Stereo Offset to have an effect.
• Grain Shape pop-up menu and field: Choose the envelope shape that is applied to each
grain. At a basic level, this applies a small fade-in and fade-out to each grain, but some
shapes may have a more significant impact, depending on the current Size and Density
values (and the source material). You can also step through the available grain shapes
with the Previous and Next buttons (the arrows).
This function is primarily intended to reduce or remove glitches, clicks, and crackles in
the playback of a stream of grains, but it can introduce buzzy gaps between grains and
can affect the tonality of grains. The effect of the chosen grain shape can also be quite
subtle in many cases, particularly when you avoid extreme Size and/or Density values.
There are no fixed rules when it comes to the choice of grain shape, given the infinite
variety of source audio material. Therefore, you may want to experiment to achieve the
required results.
Logic Pro Alchemy sampler element controls
Source components are shown only in advanced view. Click the Advanced button to switch
to advanced view, then click the A/B/C/D button to select the source you want to edit.
The parameters in this section are shown when the Sampler button is active in a source
subpage. The sampler section is available only when you import an audio sample using
either granular or sampler mode. See Logic Pro Alchemy Import browser.
The sampler section allows audio files, known as samples, to be played directly. Samples
played at a higher pitch than the original play back at a faster speed. Samples played
at a lower pitch than the original play back at a slower speed. The sample waveform is
displayed in the center. A progress bar indicates the current playback position for the most
recently triggered note.
Note: The sampler and granular engines are mutually exclusive: you can use one or the
other within a single source, but not both together. You can, however, enable further
sources if both engines are required simultaneously.