dcblock — A DC blocking filter.
Implements the DC blocking filter
Y[i] = X[i] - X[i-1] + (igain * Y[i-1])
Based on work by Perry Cook.
ain -- audio signal input
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Note |
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The new dcblock2 opcode is an improved method of removing DC from an audio signal. |
Here is an example of the dcblock opcode. It uses the file dcblock.csd, and beats.wav.
Example 112. Example of the dcblock 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 dcblock.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Initialize the global variables. sr = 44100 kr = 4410 ksmps = 10 nchnls = 1 ; Instrument #1 -- normal audio signal. instr 1 asig soundin "beats.wav" out asig endin ; Instrument #2 -- dcblock-ed audio signal. instr 2 asig soundin "beats.wav" igain = 0.75 a1 dcblock asig, igain out a1 endin </CsInstruments> <CsScore> ; Play Instrument #1 for 2 seconds. i 1 0 2 ; Play Instrument #2 for 2 seconds. i 2 2 2 e </CsScore> </CsoundSynthesizer>