17 Feb
2010
17 Feb
'10
9:08 a.m.
On Tue, 16 Feb 2010, James Courtier-Dutton wrote:
I guess a good start would be what digital values should create what voltages on the line output? One can then at least get the 0dB point set right.
It seems that I have to buy a precise voltmeter or good digital oscilloscope to get these results :-) Anyway, the voltage levels expressions are described nicely here:
http://en.wikipedia.org/wiki/Decibel
_From above pro-equipment works with 0.775V as reference volume (0dBu) and consumer electronics with 1V as reference volume (0dBV).
Jaroslav
----- Jaroslav Kysela perex@perex.cz Linux Kernel Sound Maintainer ALSA Project, Red Hat, Inc.