ampdbfs — Returns the amplitude equivalent (in 16-bit signed integer scale) of the full scale decibel (dB FS) value x.
Returns the amplitude equivalent of the full scale decibel (dB FS) value x. The logarithmic full scale decibel values will be converted to linear 16-bit signed integer values from −32,768 to +32,767.
Here is an example of the ampdbfs opcode. It uses the file ampdbfs.csd.
Example 51. Example of the ampdbfs opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform -odac ;;;RT audio out ;-iadc ;;;uncomment -iadc if RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o ampdbfs.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 instr 1 idb = p4 iamp = ampdbfs(idb) asig oscil iamp, 220, 1 print iamp outs asig, asig endin </CsInstruments> <CsScore> ;sine wave. f 1 0 16384 10 1 i 1 0 1 -1 i 1 + 1 -5 i 1 + 1 -6 i 1 + 1 -20 e </CsScore> </CsoundSynthesizer>
Its output should include lines like:
instr 1: iamp = 29204.511
instr 1: iamp = 18426.801
instr 1: iamp = 16422.904
instr 1: iamp = 3276.800