MLP Report

Windows Vista-
64bit
Preview filter - Jack Detect Override
on digital pin widgets Errata 1299
The HD Audio configuration default
register (7.3.3.31 in the HD Audio
specification) includes a "Jack Detect
Override" flag that can be used to
indicate that although a pin widget
would normally be capable of jack
detection, there is something about
this particular system that causes
this to be impossible. This was
intended to be used, for example, for
analog pin widgets that are
connected to RCA jacks, which do
not allow for impedance detection.
Some digital pin widgets are using
the Presence Detect pin sense
response to indicate that a digital
handshake has occured - indeed,
HDMI pins have entire DCNs built
around this concept, and it applies
equally well to S/PDIF pins. A digital
converter that supports presence
detection should be able to do so in
any system, so the "Jack Detect
Override" concept should not apply
to digital pins.
Windows 7
Win7:Class Driver Fidelity Test - Win7(System,
Manual)
Windows 7 64-bit
Windows Vista
Vista:HDAudio Class Driver FidelityTest
(System Munual)
06/01/2011
1801
Erratum
Issue Description:
Windows Vista-
64bit
There is a test bug which causes the
measurement of system noise
during Render Power Transition Test
to be about 3 dB worse than it
should be. This filter forgives errors
up to 6 dB.
Windows 7
Win7:Class Driver Fidelity Test - Win7(System,
Manual)
Windows 7 64-bit
Windows Vista
Vista:HDAudio Class Driver FidelityTest
(System Munual)
06/30/2025
1256
Erratum
Issue Description:
Windows Vista-
64bit
Run AC3 test on a system with the
Microsoft HD Audio class driver
installed. Expected results: All AC3
kernel streaming data ranges should
advertise MinimumBitsPerSample =
16 and MaximumBitsPerSample =
16. Actual results: HD Audio class
driver sometimes advertises
MaximumBitsPerSample = 24.
Windows 7
Win7:Class Driver AC3 Test - Win7(system)