.TH COMB 1carl CARL
.SH NAME
comb \- comb filter for piped sound signals
.SH SYNOPSIS
.B comb
gain delay < floatsams > floatsams
.SH DESCRIPTION
A simple, monophonic comb filtering program which has gain and delay.
The input and output
data streams normally consist of binary, floating-point sample numbers.
If the output is connected to a terminal, ASCII data is produced.
.I gain 
must be a number less than 1.0, and 
.I delay 
(in samples) must be less than 100,000.  
The time it takes for the tail of this (tape-loop-like) echo to
die down by a factor of 60 dB is approximately
.\"	                      (60 * sampling rate)
.\"	T =                    ------------------   seconds
.\"	                         (d * 20*log(g) )
.sp
.EQ
T = { (60 * "sampling rate") } over { (d * 20*log(g)) } seconds
.EN
.sp
(logarithm to the base 10)
.SH AUTHOR
F. R. Moore
.SH SEE ALSO
wire(1carl), getfloat(3carl)
