| Every NetStreamer program has a parameter that specifies to which IP-Address
(or IP-number) & Port to listen to or connect to.
It's like this:
flits102-126.flits.rug.nl:8888
or
This specifies the host flits102-126.flits.rug.nl, port 8888.
When you specify only :8888, this means port 8888
on local address(es).
Port 8888 is the default NetStreamer port, and there is a Server
running on flits102-126.flits.rug.nl, so you might try to telnet
to it. See the file COMMANDS for the commands the server understands
when you connect to it. The Server has only this address:port
parameter. So you can start the server by entering:
or
Your machine is now ready to accept NetStreamer connections. For an example
you can look at the DemoServer script.
You can start the Transmitter by entering:
NrTransmitter Device 16 995 "Station 1" flits102-126.flits.rug.nl:8888
or
NrTransmitter Device 16 995 "Station 1" :8888
This means that the transmitter will transmit a 16 kHz stream, claim 99.5
MHz, being labeled Station 1, and it will connect to the specified
server. The label is passed to the receiver when it tunes in on 99.5 MHz.
You can als let the transmitter playback prerecorded "tapes". Those
are files with the ".tape" extension that contain CCITT_ADPCM
compressed data. They can be recorded by using the record button on the
Frontend. The way to playback them is like this:
NrTransmitter Direcory 8 995 "Station 1" flits102-126.flits.rug.nl:8888
/mnt/tape
This makes the transmitter play tape files in the directory /mnt/tape
in random order, at 8 kHz. The filenames of the tapefiles should be chosen
carefully. The filename without the extension .tape of every transmitted
file will be transmitted and displayed by the NrRecFrontend receiver.
A good suggestion for choosing your filenames would be: "Artist:
Composition.tape", e.g. "Michael Jackson: Billy Jean.tape".
Another option is to make the transmitter accept an audio stream on
standard input, e.g. from an mp3 player, like this:
mpg123 -s test.mp3 | NrTransmitter StdIn 16 995 "Station 1" flits102-126.flits.rug.nl:8888
44
This makes the mpeg player mpg123 play the file test.mp3 and pass
it on to NrTransmitter. NrTransmitter assumes a sample-rate of 44 kHz for
the input, and converts it to a samplerate of 16 kHz.
For examples you can look at the DemoTransmitter script.
The Receiver can be started by entering:
NrReceiver 995 flits102-126.flits.rug.nl:8888
This means that you want to tune in on 99.5 MHz, after connecting to the
specified server. The X-Window receiver can be started by entering:
NrRecFrontend flits102-126.flits.rug.nl:8888
You only specify where to connect, because it has a button to tune into
any frequency you like.
With the NrRecFrontend program you can record what you receive,
by pushing the RECORD button. If you do so a file default.tape
will be written to the current directory. If the file already exists, new
recordings will be appended. This kind of file can be played by the transmitter
in the way described.
For examples you can look at the DemoReceiver and the DemoFrontend
scripts.
The Encoder can be started by entering:
NrEncoder 44 16 < music.pcm > music.tape
The Encoder will now convert a 44 kHz PCM file music.pcm to a
16 kHz .tape file music.tape.
For an example you can look at the DemoEncoder script. It converts
.mp3 files to .tape files. |
