Re: Audio Op Amp power

On Aug 9, 9:25 pm, "Jon Slaughter" <Jon_Slaugh...@xxxxxxxxxxx> wrote:
I guess a few things I'm not sure of besides running at the min voltage is
if order matters and if I should do things even though its not necessary.

For example, I need to filter the input and amplify it. Does it matter which
order? (of course it shouldn't but maybe it does in practice) Also, should I
buffer the input first even though its going to an amplifier that I would
imagine also is sorta acting like a buffer.

I think I could probably combine the filter, buffering and amp all into one
circuit and just use one op amp?

Jon, it's admirable to make a circuit from scratch, but
you can first work with a professionally-designed circuit
to see how it works and get some experience. One issue
is making the hardware-software interface work. For
example, many digital audio compaines, such as Creative
and E-Mu, use 24-bit 48 or 96kHz A/D converters with a
standard audio/digital interface data stream called ASIO.
Most of the relevant hardware is available cheaply on
eBay, to help you get off to an easy start.

For example, the Creative USB Sound Blaster, Audigy 2 NX,
(model SB0300) has two stereo 24-bit A/D inputs and both
USB and optical outputs, and meets the ADIO standards.
You can get used ones on eBay for $40 to $70. This one
went for $40, although that was likely a bit of a fluke.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170134761750

USB Sound Blaster Live! may be another possibility.

If you want better, more professional, but still cheap
stuff, check out E-MU products on eBay, like the 0202.

.

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