Network Radio

The TG97 network will feature a network radio station. By using the D2LIK sound system, made by Liket of Goto10 , the party radio station RadioActive will broadcast music, interviews, news, and audio from the competitions.

Hardware reqs:

Two different receivers exist. One is for DOS, and the other is Windows 95 native.

To use the DOS receiver, you need a 386dx-33 (!) or faster PC, a network card with IPX drivers (Frametype Ethernet_802.3) and an Ultrasound or SB16 (for stereo, HQ) or a Soundblaster 2.0 (mono sound only). The DOS receiver uses 11% of the CPU resources on a standard 486dx2-66. The receiver is memory resident, so you can do anything you want with your computer - coding, painting, watching demos, playing Quake or even running Windows 3.1! Anything will work, as long as it doesn't try to use the same soundcard.

The Windows 95 receiver is developed by Xory / Phoenix and its hardware requirements aren't as modest - you'll need a DX4-100 to be able to do something else at the same time. You'll need to have the Windows IPX drivers installed, but any windows compatible soundcard will work.

D2LIK:

The transmitting itself is done with IPX broadcasts, 36 packets * 973 bytes per second, which gives a network load of about 1/36 (10mbit).

The audio is 32khz stereo, and compresed with a modified ADPCM format.

D2LIK also features a 160x100 5 grays station logo (RDS) and an infinite length scrolltext.

Transmitter:

The transmitter, as well as the DOS receiver, is entirely made by me, Liket of Goto10, with a little help from my friends of course. Both of them are written in Powerbasic with inline assembler! The transmitter runs on a 486dx4-120 with two synchronized SB16's and an NE2000 vanilla flavour network card. The transmitter features (except for the transmitting itself) are:

- Multiband dynamic compressor (3-band) with separate noisegates, ratio and release time settings for each band. The compressor's main purpose in life is to compress the dynamic range, that is to elevate the soft parts of the music, which would otherwise not be audible in a noisy party environment. The fact that it's multiband also serves another purpose - is compresses the bass, midrange and treble separately, so if the bass or treble is weak, the compressor will elevate them without touching the midrange! This gives a clear, crisp, punchy and loud sound. And, mind you, we're NOT overdoing things like NRJ usually do.

- Separate stereo microphone input and compressor, and music autofade/talkover. This makes the speech clear and professional sounding. The compressor has a built in noisegate which removes breathing sound which can be heard on almost all FM radio stations.

- 16-bit master output, which can be hooked to an FM transmitter, realaudio server, tape recorder or whatever.

- 8-bit studio output, which features all audio EXCEPT the speech! Therefore, the DJ can have the volume cranked up in the studio without risk of acoustic feedback.

- Disco Light synchronization! This is of course not needed when using the transmitter for radio broadcasts, but it's a very nice feature to have on discos.

- 14 profiles for different DJ's with different compressor settings.

- Messaging system! The listeners may use a program called SENDMSG.EXE to send an 80-char message to the DJ's. A dot matrix printer is connected to the transmitter, and it prints the messages as soon as it receives them (with flood protection, of course.)

Am I boring you yet? =)

Equipment:

Except for the transmitter itself, we have some other equipment too:

1 486dx2-66 - to play jingles, advertisements and talk backgrounds.

2 Tapedecks - one Sony TC-K1A and one AKAI CS-MO1. These are used for music.

2 CD players. Used for music, of course.

1 Hitachi F780 Hifi stereo VCR. Also used for music.

1 OLD Citizen typewheel printer.

1 Pioneer SA-408 amplifier and two speakers (two 8 inch woofers + mid + treble each, for monitoring)

2 Headsets, for monitoring and talking

1 mixer table, to mix everything together. I (Liket) built it, and it has eight stereo inputs + 2 microphones, variable monitor output left/right, and buttons to control both the jingle computer and the transmitter!

And last but not least: over 2500 tunes on CD, Tape and Hifi VHS!

DJ's:

Liket / Goto10 (that's me). My program is called Prime, and I play dance, pop and rock, in that order of priority. (Dance = Disco, Eurodisco, Rave, Trance, Goatrance, House, Breakbeat, Hiphop and Hardcore.)

Dr. Günther / Radioactive. Program name: Raviation. He plays Rave, Techno and Hardcore. Has a great radio voice too.

Mooseart / Goto10. Program name: Trancemission. He plays rock, dance and pop.

Poison / Goto10 - plays mostly G-Funk.

Metronome / Goto10. Program name: Underground. Plays Techno, Rave and Hardcore.

Unfortunately, it's uncertain whether anyone but me can make it to the gathering, so: If you feel you want to broadcast for the network radio, get in touch with me! Liket@hem.passagen.se. I'll be very happy to hear from you, and I do need help - there's no way for one person to broadcast 24h.


  The D2LIK system has successfully been used at TGTBT'96, Compusphere 7, Icing'96 and Assembly 96. It failed completely at The Party 7, because the network didn't route our packets - even though the network organizers had the specifications two months in advance. Guess if it was fun to bring two cubic meters of equipment for nothing ;-(.

Anyway, last but not least: Giga thanks to Vegard Skjefstad / TG organizing for taking me and this project seriously, and sending a car down to Gothenburg to get me and the equipment! I sincerely hope we'll be able to make the effort worthwhile.

Stay Tuned!

Liket / Goto10


Last modified: Monday, 17-Mar-97 19:20:00 MET