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.TH BROADCAST 1 .SH NAME broadcast \- send audio UDP packets to be received by radio .SH SYNOPSIS .B broadcast [ .BI \-p port ] [ .BI \-b addr ] ... [ .BI \-c port ] [ .BI \-t ] [ .BI \-d ] .SH DESCRIPTION .I Broadcast reads audio data in U-LAW format (8000 samples/second, 1 byte/sample, logarithmically encoded) from standard input, chops it up into packets of 1400 bytes each, and transmits these as UDP broadcast packets. On a typical ethernet, this uses about 1 percent of the net available bandwith (less than 6 packets per second). .PP It is possible to use multiple transmission stations (each identified by a different UDP port), and to transmit to multiple connected subnets simultaneously, as long as the gateways let UDP broadcast packets through. Each transmission station should run on a different host though. .SH OPTIONS .TP 10 .BI \-p port Transmit to this UDP port number (default 54321). .TP 10 .BI \-b addr IP address to send to (default broadcast on local net). The address may be a host name (for unicast) or an IP multicast address (last bvyte 0 or 255). More than one .B \-b option may be given; the data is sent to each address. .TP 10 .BI \-c port Use this UDP port number as control port (default 54320). Normally you never need to change this; the control port is used by optional ``tuner'' software (not distributed). .TP 10 .B \-t When the input is faster than real time, e.g., read from a file, this option ensures that the packets are sent out at the correct rate. Normally, it is presumed that the standard input provides the data at the correct rate (8000 bytes/sec). .TP 10 .B \-d Turn on debugging (a message on stderr for each 8 packets sent). .SH AUTHOR Guido van Rossum .SH VERSION This manual page documents broadcast version 1.0, patchlevel 3.
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