delayw — Writes the audio signal to a digital delay line.
delayw writes asig into the delay area established by the preceding delayr unit. Viewed as a pair, these two units permit the formation of modified feedback loops, etc. However, there is a lower bound on the value of idlt, which must be at least 1 control period (or 1/kr).
Here is an example of the delayw opcode. It uses the file delayw.csd.
Example 105. Example of the delayw 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 ; Audio out Audio in No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o delayw.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Initialize the global variables. sr = 44100 kr = 4410 ksmps = 10 nchnls = 2 ; Instrument #1 -- Delayed beeps. instr 1 ; Make a basic sound. abeep vco 20000, 440, 1 ; Set up a delay line. idlt = 0.1 adel delayr idlt ; Write the beep to the delay line. delayw abeep ; Send the beep to the left speaker and ; the delayed beep to the right speaker. outs abeep, adel endin </CsInstruments> <CsScore> ; Table #1, a sine wave. f 1 0 16384 10 1 ; Keep the score running for 2 seconds. f 0 2 ; Play Instrument #1. i 1 0.0 0.2 i 1 0.5 0.2 e </CsScore> </CsoundSynthesizer>