On Dec 14, 2005, at 12:42 PM, Juan Cubillo wrote:

> How did he sincronised music with lights?
>
There are several standardized protocols for synchronizing assorted
thingees with a musical score, used in everything from planetariums
to rock concerts to fireworks shows.  The simplest form is probably
the synchronized cassette/filmstrip projector that dates back at
least 30 years, where you put your audio on one track of a stereo
cassette and info to advance the film on the other track...

It would be EASIER to do this with a digital system; you're playing
back at 44k samples per second; it'd be trivial to run a parallel
data track at 4.4k bytes per second (for instance), letting you
trigger something every tenth of a second or so...

BillW

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