dbamp — Returns the decibel equivalent of the raw amplitude x.
Here is an example of the dbamp opcode. It uses the file dbamp.csd.
Example 170. Example of the dbamp 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 dbamp.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 instr 1 iamp = p4 idb = dbamp(iamp) print idb asig vco2 iamp, 110 ;sawtooth outs asig, asig endin </CsInstruments> <CsScore> i 1 0 1 100 i 1 + 1 1000 i 1 + 1 10000 i 1 + 1 20000 e </CsScore> </CsoundSynthesizer>
Its output should include lines like this:
instr 1: idb = 40.000 instr 1: idb = 60 instr 1: idb = 80 instr 1: idb = 86.021