10.6

Table Of Contents
79Logic Pro Instruments
Each column of pixels represents a snapshot in the additive data. The leftmost
column describes snapshot 1, the next column to the right describes snapshot 2, and
so on. Snapshots are timed at a steady rate of 20 per second.
Within each column, there is a one-to-one correspondence between pixels and
partials: the bottom row represents partial 1, the second row up represents partial
2, and so on. Thus the height of your image determines the number of partials. For
example, an image 100 pixels tall translates to a 100-partial sound.
The brightness of each pixel determines the amplitude of a particular partial in
a particular snapshot. A black pixel corresponds to silence, while a white pixel
corresponds to maximum amplitude. You can import both color and grayscale
images. Color information other than brightness is ignored.
Note: Importing an image with a lot of bright pixels results in additive data with
numerous high-amplitude partials, which may cause clipping to occur.
3. If the results of an image import are unexpectedly noisy, you can reduce the overall
amplitude by doing one or more of the following:
Reduce the Vol setting of the additive element.
Click the Overall button, then choose All from the Mode pop-up menu, and drag
downward in the Partial bar display.
Use your graphics software to darken the image before importing it.
Logic Pro Alchemy partial envelope
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 editor
window.
The Partial envelope shows a number of points that indicate the temporal position of
envelope snapshots (groups of partials) or individual partials, depending on the chosen
Mode pop-up menu option (above the Partial bar). These points also indicate the overall
level or value of the visible parameter type in the selected snapshot or partial. Partials are
shown in the Partial bar display. See Logic Pro Alchemy partial bar display.