cmp — Compares audio signals or arrays
Plugin opcode in emugens.
Compares audio signals or arrays, sample by sample or value by value All comparison operations are possible: `< `<=, >, >=, ==, !=
An audio signal can be compared against another audio signal, or against a scalar (i- or k-value).
aOut cmp aL, ">", aR
aOut cmp aIn, ">=", 0.5
aOut cmp aIn, "`<=", kthreshold
An array can be compared against another array, against a scalar, or checked to be within the range of two scalars. All operations are available for i- and k- arrays
kOut[] cmp kIn[], ">=", kx
kOut[] cmp kA[], "==", kB[]
kOut[] cmp 0.5, "`<", kIn[], "`<=", 1
aout cmp a1, S_operator, a2
aout cmp a1, S_operator, kb
kOut[] cmp kA[], S_operator, kb
kOut[] cmp kA[], S_operator, kB[]
kOut[] cmp k1, S_operator1, kIn[], S_operator2, k2
a1 / a2 -- Input signals
kb / ib -- Scalar term
kA[] / kB[] -- array inputs
Some example usages:
aout cmp aL, ">", aR ; aout = aL > aR for every sample
aout cmp aL, ">=", aR
aout cmp aL, "`<", aR
aout cmp aL, "`<=", aR
aout cmp aL, "==", aR
kOut[] cmp kA, ">=", kb ; kA is an array
Here is an example of the cmp opcode. It uses the file cmp.csd.
Example 149. Example of the cmp opcode.
<CsoundSynthesizer> <CsOptions> </CsOptions> <CsInstruments> sr = 44100 ksmps = 128 nchnls = 5 0dbfs = 1.0 ; this is the example file for 'cmp' /* cmp compare audio or arrays, value by value Audio: * compare audio signals, sample by sample, against another signal or scalar * compara audio singal, sample by sample, within a range: aout cmp klo, "<", ain, "<=", khi Arrays: * compare arrays value by value or against a scalar * compare array value by value within a range: kout[] = klo < kin[] <= khi -> kout[] cmp klo, "<", kin[], "<=", khi aout cmp a1, Sop, a2 : aout cmp ain, "<", acmp aout cmp a1, Sop, kval : aout cmp ain, ">=", 0.1 kout[] cmp k1[], Sop, k2[] : kout[] cmp kxs, "<", kys iout[] cmp i1[], Sop, i2[] : iout[] cmp ixs, "<", iys kout[] cmp k1[], Sop, k : kout[] cmp kxs, "<", 0.5 iout[] cmp i1[], Sop, i : iout[] cmp ixs, "<", 0.5 kout[] cmp klo, Sop, kx[], Sop, khi : kout[] cmp 0, "<", kxs, "<=", 1 iout[] cmp ilo, Sop, ix[], Sop, ihi : iout[] cmp 0, "<", ixs, "<=", 1 TODO: implement array operations for multidim. arrays (at the time, array operations work only for 1D-arrays) */ ; for audio operations, render this to a soundfile and open in an editor ; to check the results instr 1 a0 linseg 0, p3, 1 a1 linseg 1, p3, 0 aout1 cmp a0, "<", a1 aout2 cmp a0, "<=", 0.5 aout3 cmp a0, ">", 0.5 outch 1, a0 outch 2, a1 outch 3, aout1 outch 4, aout2 outch 5, aout3 endin instr 4 ; cmp with arrays ixs[] fillarray 0, 1, 2, 3, 4, 5 iys[] cmp ixs, ">=", 3 printarray iys, "", "instr 4, iys" kxs[] fillarray 0, 1, 2, 3, 4, 5 kys[] cmp kxs, ">=", 3 printarray kys, 1, "", "instr 4, kys" turnoff endin instr 5 ; range ixs[] fillarray 0, 1, 2, 3, 4, 5 iys[] cmp 1, "<", ixs, "<=", 4 printarray iys, "", "instr 5, iys" kxs[] fillarray 0, 1, 2, 3, 4, 5 kys[] cmp 1, "<", kxs, "<=", 4 printarray kys, 1, "", "instr 5, kys" turnoff endin </CsInstruments> <CsScore> i 1 0 2 i 4 0 1 i 5 0 1 </CsScore> </CsoundSynthesizer>