DJ's that I know hate using computerized audio systems. They say
that PC's can let them down (we all know the good old blue screens
that Winblows produces every couple of hours or so). There are also
other things, most not entirely (if at all) justified.
Beginner would probably
start by plugging his CD or cassette deck directly into his transmitters
audio input. However this is not a professional way of doing things.
Classical setup would be something like this:
This is typically
part of the stereo encoder itself, it raises level of higher frequencies
in audio. Higher frequencies are then attenuated in receiver. This
technique lowers level of noise in received signal.
-Low pass filters
Audio signal has
to pass low pass filter before it goes into stereo encoder. Audio
signal should not appear close to 19KHz as this is where stereo
PILOT is and it would cause the Stereo LED on the receiver to flicker
as well as receiver shifting to MONO mode. Even if you transmit
in MONO, such low pass filter should be used. Why? To limit space
that your signal uses on the band. Your signal could become wider
than the standard deviation for FM broadcasting, resulting in interference
to other radio stations. Interference means you can get busted!
-Audio limiter, makes
sure your signal never gets too far from center frequency.
your average loudness
Finally, for gods
sake, play same great music. Go above the commercial crap everyone
plays these days.
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