Apple MainStage 3 Instruments - MainStage 3 Instruments

If you’re unconcerned with the pitch of your sound, you can get the weirdest spectra out of odd
frequency ratios—oscillator intervals.
The FM Out of Tune setting offers a bell-like sound, reminiscent of a ring modulator. It was
achieved through a setting of 30 s 0 c, with the modulator set to a value of 0 s 0 c. Sounds like
this were commonly used in the electronic music of the eighties and have had a resurgence in
popularity in ambient and trance music styles.
You can further develop the sound by applying filtering, envelope modulations, and effects.
There is, however, one small problem—the sound is out of tune.
Do the following:
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Use oscillator 3 as a reference for the tuning of the FM sound by dragging the pointer in
the Triangle.
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You’ll notice that the sound is five semitones too high (or seven semitones too low, conversely).
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Transpose both oscillators 1 and 2 five semitones (500 ct) lower. Transposing them upward is not
practical, as you’d need to select 37 s 0 c for oscillator 1, which has a maximum value of 36 s 0 c.
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It’s important to maintain the frequency ratio (interval) between oscillators 1 and 2. This means
that oscillator 1 sounds at 25 s O c and oscillator 2 at −5 s 0 c.
Chapter 3 ES2 100