GENsone
"sone" — Generate a table with values of the sone function.
Initialization
size -- number of points in the table. Must be a power of 2 or power-of-2 plus 1 (see f statement).
start, end -- first and last value to be stored. The points stored are uniformly spaced between these to the table size.
equalpoint -- the point on the curve when the input and output values are equal.
rescale -- if not zero the table is not rescaled
The table is filled with the function x*POWER(x/eqlp, FL(33.0)/FL(78.0)) for x between the start and end points. This is the Sone loudness curve.
Examples
Here is an example of the GENsone routine. It uses the files Play gensone.csd
Example 1318. An example of the GENsone routine.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;realtime audio out ;-iadc ;;;uncomment -iadc if realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o gensone.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ; simple oscillator with loudness correction. kcps = cpspch(p4) kenv linseg 0, p3*0.25, 1, p3*0.75, 0 ;amplitude envelope kamp tablei 16384 *kenv, 2 asig oscil kamp, kcps, 1 outs asig, asig endin instr 2 ;neutral oscillator to compare with kcps = cpspch(p4) kenv linseg 0, p3*0.25, 1, p3*0.75, 0 ;amplitude envelope asig oscil kenv, kcps, 1 outs asig, asig endin </CsInstruments> <CsScore> f 1 0 16384 10 1 ;sine wave f 2 0 16385 "sone" 0 32000 32000 0 s f 0 1 ;1 second of silence before we start... s i 1 0 2 7.00 i 1 + . 7.01 i 1 + . 8.02 i 1 + . 8.03 s i 2 0 2 7.00 i 2 + . 7.01 i 2 + . 8.02 i 2 + . 8.03 e </CsScore> </CsoundSynthesizer>
This is the diagram of the waveforms of the GENsone routine, as used in the example:
f 2 0 16385 "sone" 0 32000 32000 0