KZSU Cyber Radio 1 Internet Broadcast

Last update: March 12, 1996

KZSU now broadcasts its air signal using the Cyber Radio 1 system, virtually the same software used by WREK-NET. The sound is represented with 8-bit mu-law encoding, sampled at 8000 Hz (i.e., bandlimited to 4000 Hz) as monophonic sound. It's fundamentally the same quality you'd get on a good telephone.

If you are using a Macintosh, a Windows/DOS computer, or a non-desktop computer, you'll have to pit your wits against the source code; at KZSU, we're mainly poor UNIX nerds (which is why we can't afford RealAudio or StreamWorks). Sorry.

Watch this space. We'll be adding new clients, WWW sound samples, and other features in our copious free time.

How to listen to KZSU via Cyber Radio 1 (UNIX client)

Your Internet connection should be able to deliver at least around 64,000 bps for the audio before you try this. Otherwise, you'll probably receive subliminal messages from some past KZSU program director.

Retrieve the client appropriate for your system via FTP (below). Make sure you use binary mode!
If necessary, uncompress the binary:
$ uncompress cr1.some-long-suffix.Z
Note that many Web browsers (e.g., Netscape and Mosaic) will do this for you automagically.
Rename your copy to something you can type:
$ mv cr1.some-long-suffix cr1
Ensure that your copy has execution bits turned on:
$ chmod +x cr1
Run the client:
$ ./cr1
After a few seconds of setup, you should start hearing the sound of KZSU.
If you're using the generic Georgia Tech client instead of one from KZSU's FTP archive, point it to our server:
$ ./cr1 -i kzsu-cr1.stanford.edu
For the domain-challenged, this is currently 36.118.0.90.
When you're done, type your interrupt character (usually Ctrl-C or DELETE) to end the the client program.

FTP Resources for Cyber Radio 1

KZSU keeps some Cyber Radio 1 files on our FTP server under ftp://www-kzsu.stanford.edu/CyberRadio1.

Here are a few extra hyperlinks for your convenience:

Man page for the generic Cyber Radio 1 UNIX client
SunOS 4.1.3 client for SparcStations (has worked on Solaris 2.3 system)
Silicon Graphics IRIX 5.3 client
Imperial College's Windows Client for Cyber Radio 1 (Trial Release)

The original source for Cyber Radio 1 is in the FTP directory, ftp://ftp.gatech.edu/pub/wrek/CyberRadio1
from WREK at Georgia Tech. This should compile OK on FreeBSD and/or LINUX systems. Or it can be the basis of your own super-duper client if you feel so moved.

Also, John Selbie, CR1's creator, keeps a number of WWW pages of interest:

Cyber Radio 1 Home Page
Frequently Asked Questions list for Cyber Radio 1.
The Canonical List of public Cyber Radio 1 servers

Problems?

Thus far, the problems that listeners have encountered are solvable, provided they have the skill, tools and time to wrangle with the source code:

Various shared library version mismatches. This seems to happen when our FTP'd binaries for SunOS 4.1.3 are used on Solaris systems:
```
  % cr1 -i kzsu-cr1.stanford.edu
  ld.so.1: ./cr1: warning: /usr/4lib/libc.so.1.8 has older revision than expected 9
```
If cr1 runs, then you can usually ignore such warnings, though if you recompile it on your system, you can get rid of the warnings altogether.
Host kzsu-cr1.stanford.edu not found.
If this problem persists when you use the IP address directly, your workstation may be Internet-connected through a firewall and depend on a proxy system such as Socks. If your site uses Socks V5, you may be able to use UDP through your firewall -- you'll need to retrieve the source from WREK, modify it, and compile it. If you succeed, please share the changes with us so that we can pass them on to other listeners.

KZSU

Stanford.

<info@kzsu.stanford.edu>