Some FM instrument examples

When implementing simple FM instruments, we have these main parameters that will effect the overall sound:

1. The carrier and modulator frequency and phase
2. The maximum modulating index
3. The envelopes that define how the amplitude and modulating index evolve over time.

Using the information taken from John Chowning's article on FM we may develope envelopes for the following simple FM instruments:

• bell-like tones,
• wood-drum
• brass-like tones
• clarinet-like tones