linlin — Linear to linear interpolation
Plugin opcode in emugens.
Maps a linear range of values to another linear range of values. Supports both scalars and arrays, at i- and k-time
ky linlin kx, ky0, ky1 [, kx0, kx1 ]
iy linlin ix, iy0, iy1 [, ix0, ix1 ]
kys[] linlin kxs[], ky0, ky1 [, kx0, kx1 ]
iys[] linlin ixs[], ky0, ky1, [ kx0, kx1 ]
kC[] linlin kx, kA[], kB[] [, kx0, kx1 ]
kx -- Input signal
kx0 -- Lower limit of input range. Defaults to 0
kx1 -- Higher limit of input range. Defaults to 1
ky0 -- Lower limit of output range
ky1 -- Higher limit of output range
y = (x - x0) / (x1 - x0) * (y1 - y0) + y0
Here is an example of the linlin opcode. It uses the file linlin.csd.
Example 508. Example of the linlin opcode.
<CsoundSynthesizer> <CsOptions> </CsOptions> <CsInstruments> sr = 44100 ksmps = 128 nchnls = 2 0dbfs = 1.0 ; Example file for linlin.csd /* linlin linear to linear interpolation between two ranges ky linlin kx, ky0, ky1, kx0=0, kx1=1 kys[] linlin kxs[], ky0, ky1, kx0=0, kx1=1 iys[] linlin ixs[], iy0, iy1, ix0=0, ix1=1 linlin can be also used to blend between two arrays: kC[] linlin kx, kA[], kB[], kx0=0, kx1=1 if kx==0.5, kC[] will hold the avg of kA[] and kB[] for each value (assumes that kA[] and kB[] are arrays of the same size) */ ; Map a value within the range 1-3 to the range 0-10. instr 1 kx line 1, p3, 3 ky linlin kx, 0, 10, 1, 3 printks "kx: %f ky: %f \n", 1/kr, kx, ky endin ; Map an array of values instr 2 kX[] fillarray 0, 0.5, 1, 1.5, 2 trim kX, 4 kY[] linlin kX, 0, 10, 0, 2 printarray kY turnoff endin ; Blend between two arrays instr 3 kA[] fillarray 0, 1, 2, 3, 4, 5 kB[] fillarray 0, 2, 4, 6, 8, 10 kx line 0, p3, 1 kC[] linlin kx, kA, kB printarray kC, -1, "", "blend" endin </CsInstruments> <CsScore> ; i 1 0 0.2 i 2 0.5 0.2 ; i 3 1 0.5 </CsScore> </CsoundSynthesizer>