FM Synthesis Basics (E-Piano, Bells, Percs)
Finally, a quick look at FM synthesis (using Phase-4). Digital piano sounds, bell sounds, and percussion aren't that different from each other. Here’s how you can tackle that with FM synthesis.
Classic FM E-Piano (38:38) #
- You need two Sine wave oscillators (called "Operators").
- Operator 1 (Carrier): This is the one you hear.
- Operator 2 (Modulator): This one modulates the frequency of Operator 1.
- Set Operator 2's Ratio to a high, harmonic number (e.g., 11, 13).
- Apply a decay envelope (no sustain) to the level of Operator 2. This creates the metallic "tine" sound at the start of the note.
- Apply Velocity to the modulation amount (the level of Operator 2). This is key: when you play soft, it's a gentle sine wave. When you play hard, it gets bright and metallic.
- Add Reverb and a slight Pitch Wobble (vibrato).
FM Bell & Percussion Sounds (42:38) #
- For Bells: Use the same E-Piano technique, but use odd and inharmonic ratios (e.g., 6, 13) to create metallic, bell-like tones.
- For Percussion: Use very short decay envelopes on your modulators. Explore inharmonic ratios and add Distortion or Overdrive to create unique percussive hits.
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