10.6

161Logic Pro Instruments
Morph pitch and formants in Alchemy
1. In Logic Pro, move the Pitch handle (green dot) from left to right. You can also rotate
the Pitch knob.
Drum beats don’t generally contain much pitched information, so use of the Pitch
control may have little impact when working with loops. In this case, however, setting
Pitch to the far right position results in the prominent high tom of the Insider Groove
Beat becoming louder near beat 2. Only the tail of the pitch pushes through however,
creating an eighth note rhythm that starts near beat 3.
2. Set Formant (purple dot) to 75%-100% to make the onset of the tom pitch more clearly
audible. You can also rotate the Formant knob to set this value.
3. Set the Spectral knob to zero.
You can hear the arc of the tom hit, but without tonal characteristics because there’s
little spectral material at this point in the Lockstep loop. This demonstrates the
important role that resonances play in human perception of pitch information.
Assign performance controls to morphed drum loop elements in Alchemy
1. In Logic Pro, Control-click the Position knob for source A, then choose Add Modulation
> LFO > LFO1 from the shortcut menu.
2. In the modulation section, click the Shape pop-up menu for LFO1 and choose Basic >
RampUp.
3. Switch off Bipolar mode for the LFO, and set Rate to the same number of beats as the
loop. For example, set the Rate knob to 4 beats for a one-bar loop, or to 8 beats for a
two-bar loop, and so on.
4. Control-click the Position knob for source A, and choose Copy Modulation from the
shortcut menu.
5. Click the source B button to view source B parameters.