Uses FM synthesis to create a percussive flute sound. It comes from a family of FM sounds, all using 4 basic oscillators and various architectures, as used in the TX81Z synthesizer.
All these opcodes take 5 tables for initialization. The first 4 are the basic inputs and the last is the low frequency oscillator (LFO) used for vibrato. The last table should usually be a sine wave.
The initial waves should be:
ifn1 -- sine wave
ifn2 -- sine wave
ifn3 -- sine wave
ifn4 -- sine wave
kamp -- Amplitude of note.
kfreq -- Frequency of note played.
kc1, kc2 -- Controls for the synthesizer:
kc1 -- Total mod index
kc2 -- Crossfade of two modulators
Algorithm -- 4
kvdepth -- Vibrator depth
kvrate -- Vibrator rate
Here is an example of the fmpercfl opcode. It uses the files fmpercfl.orc and fmpercfl.sco.
Example 147. Example of the fmpercfl opcode.
/* fmpercfl.orc */ ; Initialize the global variables. sr = 44100 kr = 4410 ksmps = 10 nchnls = 1 ; Instrument #1. instr 1 kamp = 30000 kfreq = 220 kc1 = 5 kc2 = 5 kvdepth = 0.005 kvrate = 6 ifn1 = 1 ifn2 = 1 ifn3 = 1 ifn4 = 1 ivfn = 1 a1 fmpercfl kamp, kfreq, kc1, kc2, kvdepth, kvrate, ifn1, ifn2, ifn3, ifn4, ivfn out a1 endin /* fmpercfl.orc */
/* fmpercfl.sco */ ; Table #1, a sine wave. f 1 0 32768 10 1 ; Play Instrument #1 for one second. i 1 0 1 e /* fmpercfl.sco */