From: Greg Daly (gdaly@u.washington.edu)
Date: 04/03/00-10:12:47 PM Z
> Did anyone figure out the easiest way to get at an audio signal?
>
> David
easiest way? not sure if I know exactly what you mean.... read on for what
looks like a more promising solution (at the bottom). if you want to do it
by the book though, here's the yamaha datasheet (not sure if you've seen
it).
http://www.yamaha.com/lsi/products/pdf/4MF715E20.pdf
pin82: outleft
pin81: outright
pin88: analog gnd
it has to be understood that i _dont have a unit right now_ so I can't
test this stuff out. however, if there is some noise when this method is
tried, we can try
(a) disconnecting the amp (might help)
(b) making a filter (i can easily do that)
the obvious disadvantage to using these pins is that they necessitate
soldering to extremely tiny pins.
So, David, if you don't want to do that, the below looks good:
supposedly the datasheet for the amp:
http://www.national.com/ds/LM/LM4835.pdf
and when you give pin21 a logic high, it turns pins 17 and 26 into a
line/headphone out! all you need is 3 resistors, 2 caps, a jack and page
12 of the pdf manual. :)
now what I need from you guys is some good detective work -- see, exactly,
what pins are connected to the speaker outs.
-greg
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