> Mathew Cohen wrote:
>  > Could you nice people suggest a good voltage controlled amp chip (audio) fo
r
>  > 4 channels or a matrix switcher with cross point attenuation 9 (chip). This
>  > is to be used with a 16f84.
>  > I think it is obvious what I am trying to achieve if anyone has another way
>  > of attenuating 4 channels of audio (with 2 channels that can be swiched to
>  > Mic level) please let me know.
>

I have used the quad VCA made by Analog Devices SM2164 for dynamic
audio routing(Dolby Surround), works well.
For simple digital volume control I have used the National LM1972,
its only dual but the attn steps are known and there is a handy mute
command.
_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand

www.psych.auckland.ac.nz

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