How do I use an old sound card as a standalone amp?
I have this old ISA sound card from a Pentium II pc laying around, and I was hoping to use it as a standalone amplifier. So far I found that it has a decent analog amplifier chip (ST TEA2025). I tried giving it 5V and giving it audio in on the designated pins, but to no effect. But ideally I'd like to use the existing Line In connector, wire it directly to the amplifier chip, and get audio out from the Out connector.
I've only been able to find one user who managed to do this, but his documentation is minimal: http://www.murga-linux.com/puppy/viewtopic.php?p=798918&sid=09cd6eb96653ecf2c5d8fceef9d45600#798918 (mirror)
Hopefully anyone has some experience with this kind of project, or can give me some tips.
The datasheet is available here: https://app.box.com/s/yh8moprz7ootuywo3yh6
Thanks in advance for any help!