GEN16
GEN16 — Creates a table from a starting value to an ending value.
Initialization
size -- number of points in the table. Must be a power of 2 or a power-of-2 plus 1 (see f statement). The normal value is power-of-2 plus 1.
![[Note]](images/note.png)
|
Note |
|---|---|
| The end value is only reached when the table length is power-of-2 plus 1. (This length is crucial for use with the tab generator.) |
beg -- starting value
dur -- number of segments
type -- if 0, a straight line is produced. If non-zero, then GEN16 creates the following curve, for dur steps:
beg + (end - beg) * (1 - exp( i*type/(dur-1) )) / (1 - exp(type))
end -- value after dur segments
Here are some examples of the curves generated for different values of type:
Tables generated by GEN16 for different values of type.
|
|
Note |
|---|---|
|
If type > 0, there is a slowly rising (concave) or slowly decaying (convex) curve, while if itype < 0, the curve is fast rising (convex) or fast decaying (concave). See also transeg |
Example 1291. A simple example of the GEN16 routine.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o gen16.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 128 nchnls = 1 instr 1 kcps init 1/p3 kndx phasor kcps ifn = p4 ixmode = 1 kval table kndx, ifn, ixmode ibasefreq = 440 kfreq = kval * ibasefreq a1 oscil 20000, ibasefreq + kfreq, 1 out a1 endin </CsInstruments> <CsScore> f 1 0 16384 10 1 f 2 0 1024 16 1 1024 1 0 f 3 0 1024 16 1 1024 2 0 f 4 0 1024 16 1 1024 10 0 f 5 0 1024 16 1 1024 -1 0 f 6 0 1024 16 1 1024 -2 0 f 7 0 1024 16 1 1024 -10 0 i 1 0 2 2 i 1 + . 3 i 1 + . 4 i 1 + . 5 i 1 + . 6 i 1 + . 7 e </CsScore> </CsoundSynthesizer>