external audio input module

[Matt Haines]

Hey, if I want to build a module that brings up external audio to +/-5v
levels for use in my M0D00LAR, is this all I need?


  input o----+
             |                          3.3M
             |                      +--/\/\/\---+
             /                      |           |
     100k    \      0.1    100k     |  |\       |
      pot    /<-----||----/\/\/\----+--| \ (-)  |
             \                         |  \     |       1k
             |                         |   \----+--+---/\/\/\------ out 1
            GND                        |   /       |    1k
                                       |  /        +---/\/\/\------ out 2
                                    +--| / (+)     |    1k
                                    |  |/          +---/\/\/\------ out 3
                                    |
                                    \
                                    /
                                    \  100k
                                    /
                                    |
                                    |
                                   GND


I stole this from the input of an envelope follower (with modifications).
Is that too much gain (x33)? I think regular audio is like +/-0.5v, which
would need a gain of 10, but that's if the input is optimal. SO I figure a
little xtra is ok, but I don't know how much more.

Or should I just use the non-inverting input?

Are there any other 'convenience' factors I'm missing in this module? It
should be a pretty simple thing, unless I'm way off.

.       .       .       .       .       .       .       .       .
    .       .       .       .       .       .       .       .
.       .       .       .       .       .       .       .       .
Matt Haines  haines at quick.net       .       .       .       .
control-X:to:abort:transmission .       .       .       .       .
    .       .       .       .       .       .       .       .
.       .       .       .       .       .       .       .       .
    .       .       .       .       .       .       .       .
Moonlight, Muzak, Knick-Knack, Paddywack