Remove (most of) DC bias from input signal.
in RTcmix/insts/jg
DCBLOCK(outsk, insk, dur, AMP)
CAPITALIZED parameters are pfield-enabled for table or dynamic control (see the maketable or makeconnection scorefile commands). Parameters after the [bracket] are optional and default to 0 unless otherwise noted.
| Param Field | Parameter | Units | Dynamic | Optional | Notes |
|---|---|---|---|---|---|
| p0 | output start time | seconds | no | no | |
| p1 | input start time | seconds | no | no | |
| p2 | duration | seconds | no | no | |
| p3 | amplitude multiplier | relative multiplier of input signal | yes | no |
Parameters labled as Dynamic can receive dynamic updates from a table or real-time control source.
Author: John Gibson , 5/21/06
DCBLOCK uses a simple one-pole/one-zero filter set to remove a DC (0 Hz) offset component in the output signal. The recursive filter equation used for this object is:
where y[n] and y[n-1] are the current and previous outputs of the equation, respectively, and x[n] and x[n-1] are the current and previous sample inputs to the filter equation.
DCBLOCK processes N input channels to N output channels, e.g. mono to mono, stereo to stereo, quad to quad, etc.
The sound itself should be relatively unchanged by DCBLOCK.
very basic:
rtsetparams(44100, 2)
load("DCBLOCK")
rtinput("mysound.aif")
DCBLOCK(0, 0, DUR(), 1.0)