dbfsamp

Returns the decibel equivalent of the raw amplitude x, relative to full scale amplitude.

Full scale is assumed to be 16 bit. New is Csound version 4.10.

Syntax

dbfsamp(x)  (init-rate or control-rate args only)

Examples

Here is an example of the dbfsamp opcode. It uses the file dbfsamp.csd.

<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 dbfsamp.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2

instr 1

iamp = p4
idb  = dbfsamp(iamp)
     print idb
asig vco2 iamp, 110     ;sawtooth
     outs asig, asig

endin

</CsInstruments>
<CsScore>

i 1 0 1 1
i 1 + 1 100
i 1 + 1 1000
i 1 + 1 10000
i 1 + 1 30000
e

</CsScore>
</CsoundSynthesizer>

Its output should include lines like this:

instr 1:  idb = -90.309
instr 1:  idb = -50.309
instr 1:  idb = -30.309
instr 1:  idb = -10.309
instr 1:  idb = -0.767

See also

Amplitude Converters