ampdbfs

ampdbfs — Returns the amplitude equivalent (in 16-bit signed integer scale) of the full scale decibel (dB FS) value x.

Description

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.

Syntax

ampdbfs(x)  (no rate restriction)

Examples

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

Example 50. 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

See Also

ampdb, dbamp, dbfsamp, 0dbfs

New in Csound version 4.10