linexp

Abstract

linear to exponentail interpolation

Description

Maps a range of values to another range of values following an exponential curve

Syntax

iy  linexp  ix, iexp, ix0, ix1, iy0, iy1
ky  linexp  kx, kexp, ix0, ix1, iy0, iy1

Arguments

• kx: input value
• kx0: lower bound of x
• kx1: upper bound of x
• ky0: lower bound of y
• ky1: upper bound of y

Output

• ky: the target value

Execution Time

• Input
• Performance

Examples

<CsoundSynthesizer>
<CsOptions>
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 128
nchnls = 2
0dbfs = 1.0

; Example file for linexp.csd

/*

linexp

linear to exponential interpolation between two ranges

ky    linexp kx, kexp, ky0, ky1, kx0=0, kx1=1

*/

; Map a value within the range 1-3 to the range 0-10 with an exponent of 2.
instr 1
  kx line 1, p3, 3
  ky linexp kx, 2, 1, 3, 0, 10
  printks "kx: %f   ky: %f \n", 1/kr, kx, ky
endin


</CsInstruments>
<CsScore>
i 1 0   0.2

</CsScore>
</CsoundSynthesizer>

See also

• linlin
• lincos
• bpf

Credits

Eduardo Moguillansky, 2019

(idea based on pd/else's envgen and supercollider's envgen)