dbamp

dbamp — Returns the decibel equivalent of the raw amplitude x.

Description

Returns the decibel equivalent of the raw amplitude x.

Syntax

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

Examples

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

Example 161. 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

See Also

ampdb, ampdbfs, dbfsamp