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delayr

Reads from an automatically established digital delay line.

Syntax

ares delayr idlt [, iskip]

Initialization

idlt -- requested delay time in seconds. This can be as large as available memory will permit. The space required for n seconds of delay is 4n * sr bytes. It is allocated at the time the instrument is first initialized, and returned to the pool at the end of a score section.

iskip (optional, default=0) -- initial disposition of delay-loop data space (see reson). The default value is 0.

Performance

delayr reads from an automatically established digital delay line, in which the signal retrieved has been resident for idlt seconds. This unit must be paired with and precede an accompanying delayw unit. Any other Csound statements can intervene.

Examples

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

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

sr = 44100
ksmps = 32
nchnls = 2
0dbfs = 1   

gasig  init 0   
gidel  = 1              ;delay time in seconds

instr 1

ain  pluck .7, 440, 1000, 0, 1
     outs ain, ain

vincr gasig, ain        ;send to global delay
endin

instr 2 

ifeedback = p4  

abuf2   delayr  gidel
adelL   deltap  .4              ;first tap (on left channel)
adelM   deltap  1               ;second tap (on middle channel)
        delayw  gasig + (adelL * ifeedback)

abuf3   delayr  gidel
kdel    line    1, p3, .01      ;vary delay time
adelR   deltap  .65 * kdel      ;one pitch changing tap (on the right chn.)
        delayw  gasig + (adelR * ifeedback)
;make a mix of all deayed signals       
        outs    adelL + adelM, adelR + adelM

clear   gasig
endin

</CsInstruments>
<CsScore>

i 1 0 1
i 1 3 1
i 2 0 3  0      ;no feedback
i 2 3 8 .8      ;lots of feedback
e
</CsScore>
</CsoundSynthesizer>

See also

Delay