db

db — Returns the amplitude equivalent for a given decibel amount.

Description

Returns the amplitude equivalent for a given decibel amount. This opcode is the same as ampdb.

Syntax

db(x)

This function works at a-rate, i-rate, and k-rate.

Initialization

x -- a value expressed in decibels.

Performance

Returns the amplitude for a given decibel amount.

Examples

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

Example 160. Example of the db 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 db.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2

instr 1

idec = p4
iamp = db(idec)
     print iamp
asig vco2 iamp, 110			;sawtooth
     outs asig, asig

endin

</CsInstruments>
<CsScore>

i 1 0 1 50
i 1 + 1 >
i 1 + 1 >
i 1 + 1 85
e

</CsScore>
</CsoundSynthesizer>


Its output should include lines like:

instr 1:  iamp = 316.252
instr 1:  iamp = 1211.582
instr 1:  iamp = 4641.643
instr 1:  iamp = 17782.420

See Also

ampdb, cent, octave, semitone

New in version 4.16