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Mike Rivers Mike Rivers is offline
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Default My PreSonus AudioBox 44VSL Review Posted

On 3/13/2012 6:34 PM, Richard Mann wrote:

- do these interfaces work with Linux (prefer Sapphire, but Presonus OK)?


Not unless someone has written Linux drivers for them. Good
luck there. It's a rare new audio interface that gets the
attention of the folks writing Linux drivers, probably
because the manufacturers aren't willing to share enough
documentation with them to get them started. I guess they
feel that sales to Linux users just aren't going to ever be
great enough to let information that they consider
proprietary out of the barn.

- did you happen to notice the internal voltages of the Preamps (or the
chip #'s on the preamps?).


I didn't have a schematic (hell, they don't even publish a
block diagram) but from inspection, it looks like there are
transistors up front and half of an MC33079 quad op amp at
the end. The 33079 is running on +/- 13.5V. I didn't probe
the transistors but given that it takes about 11 Vpp before
anything starts clipping, I doubt that this is a "low
voltage" circuit. I didn't see or hear any reason to try to
hack it.



--
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it seems that it can be operated without a passing knowledge
of audio." - John Watkinson

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