How to make a siren (!)

"Any old metal detector from the flea market and 3 bucks for the 9 volt it needs can get you some pretty good siren type effects pumped right through the 3/4 inch headphone jack with volume/level control.Most have a built in speaker as well. Move a metallic object around under the detector for variations. Use different types of metal to bug out further."
:submitted by the arkmaster, www.blackark.com

This is taken from Scroll III : Sound Sources and Manipulation on The Dub Scrolls. It's telling you how to make a siren.

http://www.interruptor.ch/dub_sound.shtml

These pages are dedicated to all makers of Dub..

..and Dub influenced music. Link. (The Dub Scrolls)

This is a cool site that has loads of tips for making Dub music.

I found this site on the dub section of the links page of http://www.rastamusic.com/.

Loads of reggae links on there.

Check this pic from the 2nd page of the site..
I always draw pictures like this before a jam when everyone expects me to record the jam for posterity and make a demo from it and release it and play bass...