Simple, fast sine oscillator, that uses only one multiply, and two add operations to generate one sample of output, and does not require a function table.
iamp -- output amplitude.
icps -- frequency in Hz (may be zero or negative, however the absolute value must be less than sr/2).
iphs -- start phase between 0 and 1.
iflg -- sum of the following values:
2: use double precision even if Csound was compiled to use floats. This improves quality (especially in the case of long performance time), but may be up to twice as slow.
1: skip initialization.
Here is an example of the oscils opcode. It uses the files oscils.orc and oscils.sco.
Example 1. Example of the oscils opcode.
/* oscils.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Instrument #1 - a fast sine oscillator.
instr 1
iamp = 10000
icps = 440
iphs = 0
a1 oscils iamp, icps, iphs
out a1
endin
/* oscils.orc */
/* oscils.sco */
; Play Instrument #1 for 2 seconds.
i 1 0 2
e
/* oscils.sco */