🚀 go-pugleaf

In article <44000023@pyr1.cs.ucl.ac.uk> william@pyr1.cs.ucl.ac.uk writes:
>
>Something I would like to see marketted is a device that you can
>plug into the speaker circuit that will normalise the output volume.
>If I am watching a film late at night, nothing annoys me more than 
>having to constantly tweek the volume down when ads and screams come
>on, and then having to bump it up to hear all the low volume whispering
>that goes on the rest of the time.

  A circuit already exists to fit the bill.  It is called an audio compression
circuit.  Amateur radio operators use these compression circiuts to condition
the audio from microphones.  Radios and TVs also use a form of compression
in the AGC circuits.  These circuits serve to boost low level signals without
amplifying the already high level signals.  Most compresssion circuits also
have contain a final output gain control to limit the maximum output level.

  However, remember that compression means 'reduce dynamic range'.  This would
cause quiet passages of your source material to become amplified (read noisy)
as well as de-emphasizing the louder sounds.

  I haven't checked to see if anyone sells a compression box to plug into a
stereo system, let alone a television, but such circuit designs can be found
in many electronc cookbooks.  Now that you know what to look for, happy
hunting!-- 
phil@mips.com
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