Creating Simple FM (Frequency Modulation) Instruments: CLARINET

If you have not already done so, please read the tutorials, Fm Fynthesis, Frequency Modulation, and FM Bell.

Here is the SYD patch for an FM clarinet. Notice the basic FM configuration (Carrier Operator; Modulator Operator). There is an amplitude envelope with a woodwind configuration attached to the Carrier operator (this is patched to the amplitude parameter of the Carrier). In addition, there is an amplitude enveloped attached to the Modulator which is controlling the MODULATION AMOUNT by changing the amplitude value of the Modulator over time.

The theory here is that the ATTACK of a sound will have the most complex spectra. For a CLARINET sound, the envelope controlling the modulator operator will maximize the MODULATION AMOUNT at the moment of attack and then reduce it to a smaller value shortly afterwards. The MODULATION AMOUNT will then remain the same throughout the remainder (sustain) of the sound.

Figure 1: SYD Patch for an FM Clarinet

Here is the amplitude envelope for a CLARINET SOUND. Notice the characteristic shape of the WOODWIND envelope. Although the AMPLITUDE envelope has a constant value throughout the SUSTAIN of the sound, the envelope for the modulator operator reduces the MODULATION AMOUNT shortly after the attack (see Figure 6 below).

Figure 2: Envelope for a CLARINET sound
Listen to the CLARINET sound

Here are the values for the Carrier Operator and Modulator Operator:

Figure 3: Carrier Operator Values

Figure 4: Modulator Operator Values

Figure 5: Carrier Envelope Values
Figure 6: Modulator Envelope Values

Listen to the FM Clarinet: FM Clarinet

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