For the latest information on MAST, please see: http://www.ecs.soton.ac.uk/~njh/mast/
MAST is an audio streaming broadcaster and client using RTP over IPv4 and IPv6 Multicast/Unicast.
Unlike VAT and RAT, which are designed primerily for audio conferencing, MAST is designed to be used for audio distribution and broadcast. It is currently limited to recieving a single audio source, unlike RAT which can mix serveral sources.
It supports many of the audio payload types in the Audio-visual Profile (RTP/AVP).
MAST is licenced under the GNU General Public License, see the file COPYING for details.
mast_info Display information about first RTP packet received mast_cast Live Audio broadcaster that sources audio from JACK mast_filecast Audio file broadcaster mast_record Record/archive audio stream to audio file mast_rawcast Directly broadcast a previously encoded audio file mast_rawrecord Record/archive raw streams directly to disk
0 8000Hz Mono u-law encoded 3 8000Hz Mono GSM 7 8000Hz Mono LPC 8 8000Hz Mono A-law encoded 10 44.1kHz Stereo Raw 16-bit linear audio 11 44.1kHz Mono Raw 16-bit linear audio 14 - - MPEG Audio (encoder only)
Details are here: http://www.iana.org/assignments/rtp-parameters
No mixer support (can only recieve single source).
No sample rate conversion support.
No upmixing/downmixing support.
No clock skew error correction.
mast_rawcast currently only supports GSM and MPEG Audio.
due to problems with oRTP, only 8000Hz streams can be recieved.
You can listen to a test stream coming from Unversity of Southampton:
njh@dobbie:~$ mast_info ff7e:0440:2001:0630:00d0:f001:9000:7e57 Receive address: ff7e:0440:2001:0630:00d0:f001:9000:7e57/5004 RTP Header ========== Payload type : 14 Payload size : 526 bytes Sequence Number : 60390 Timestamp : 3219875130 SSRC Identifier : beef7e57 Marker Bit : Not Set Payload Details =============== Mime Type : audio/mpa Cock Rate : 90000 Hz MPEG Audio Header ================= MPEG Version : MPEG-1 (Layer 2) Mode : Stereo Bitrate : 160 kbps Sample Rate : 44100 Hz Error Protection : No Padding : No Extension Bit : No Copyright : No Original : Yes Samples per frame : 1152 Bytes per frame : 522
Please email me if you have any problems listening.
Please note that you must be connected to m6bone in order to receive IPv6 multicast (http://www.m6bone.net/)