10.6

74Logic Pro Instruments
Waveform display parameters
• > button: Turn automatic audio previewing on or off when selecting zones in the keymap
editor.
• Loop XFade button: Turn on to enable crossfades between loop start and end markers
when Continuous or Sustain loop mode is chosen in the inspector.
• A crossfade (XF) marker is shown at the loop end point. Drag this marker left to
define a crossfade region, during which a portion of the sound from before the loop
start marker is faded in, while the loop region is faded out.
• In sampler mode, discontinuities between the loop start and end points can result in
an audible click each time the loop restarts. Loops in additive, spectral, or granular
modes do not click, but timbral or volume differences between the loop start
and end points can often result in an obvious sounding loop. Unlike conventional
samplers, the additive, spectral, and granular engines are capable of looping a single
instant within the sound, with loop start and end markers at identical positions. This
can work well with some sounds, but with others the loop stage may seem too static
and obviously different from the start of the note.
Tip: Looping clicks in sampler mode can usually be removed with minimal
crossfades, while other timbral or volume discontinuities may need larger crossfades.
Drag the XF marker while playing a note to find a suitable crossfade length.
Note: The Loop XFade button is shown in sampler mode only. This parameter is not
visible if other import modes are used.
• Time line: Shows the overall length of the waveform in seconds. Fractional values (of
the overall waveform length) are displayed in some situations, such as manual alignment
of warp markers.
• Scroll bar and zoom controls: Drag the middle of the scroll bar to view waveform data
that is not visible in the display area. Horizontally drag the zoom controls at either end
of the scroll bar to resize the contents of the visible display area.
Logic Pro Alchemy additive edit window overview
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 view detailed parameters for the
selected source.
The source edit window is opened by clicking the Edit button on any source subpage. Click
the close window icon (X) at the top right to close the window.
Use the Additive button at the top of the Main edit window to open the Additive edit
window.
The Additive edit window allows detailed editing of additive resynthesis data and also lets
you design sounds from scratch by creating the additive data yourself.
Additive synthesis represents each sound as a sum of individual partials. The additive data
describes each partial in terms of four parameters: amplitude, tune (pitch), pan, and phase,
each of which changes over time.