10.6

Table Of Contents
87Logic Pro Instruments
Create vowel sounds with parallel source filters
Vowel sounds in human speech are the result of formants produced by changing the shape
of the vocal cavity. By mimicking these formants, Alchemy can produce speech- or song-
like effects, even in VA mode without samples of actual speech.
1. In Logic Pro, from the Name bar, click the File button and choose Initialize Preset from
the pop-up menu to reset all Alchemy parameters to default settings.
2. Click the source A button, then make the following parameter changes:
Set Vol to 0 dB.
Set Coarse Tune to –12 semis.
3. Click the source A Fine Tune knob.
4. In the top slot of the modulation rack, choose LFO > LFO 1 from the pop-up menu, then
set the Mod Depth knob to a value near 50%.
5. In the LFO 1 control panel, set Attack to approximately 0.50 sec, turn off Sync, and set
Rate to approximately 5 Hz.
6. Enable filter 1 by clicking the On button next to the filter type pop-up menu. Do the
same for filters 2 and 3. Click the Par(allel) button to enable parallel configuration of the
source A filters.
7. Click the Global button to view all sources, then click the source A content field and
choose Copy Source from the pop-up menu.
8. Click the source B content field, and choose Paste Source from the pop-up menu.
Repeat for the source C and D content fields.
9. Click the A button to view source A, then make the following (approximate) parameter
changes to create an “ahhh” sound:
Cutoff 1 = 800 Hz, Res 1 = 87%
Cutoff 2 = 1200 Hz, Res 2 = 87%
Cutoff 3 = 2800 Hz, Res 3 = 87%
10. Click the B button to view source B, then make the following (approximate) parameter
changes to create an “eeeh” sound:
Cutoff 1 = 230 Hz, Res 1 = 87%
Cutoff 2 = 2600 Hz, Res 2 = 75%
Cutoff 3 = 3200 Hz, Res 3 = 75%
11. Click the C button to view source C, then make the following (approximate) parameter
changes to create an “oooh” sound:
Cutoff 1 = 200 Hz, Res 1 = 87%
Cutoff 2 = 880 Hz, Res 2 = 65%
Cutoff 3 = 2400 Hz, Res 3 = 50%
12. Click the D button to view source D, then make the following (approximate) parameter
changes to create an “ehh” sound:
Cutoff 1 = 530 Hz, Res 1 = 65%
Cutoff 2 = 1850 Hz, Res 2 = 75%
Cutoff 3 = 2500 Hz, Res 3 = 50%