Squeezy99 said:
Hi Andrew, thanks for the reply. Tried your suggestions but all OK.
Every setting in control panel sounds are as they should be for 5.1 - I have
run through them many times tonight.
The Realtek panel is also all correct but shows this connection problem. I
suppose I will have to check the mobo cables and connections for the sound
system.
Cheers,
Dave.
This is purely a guess. Your front panel audio header, has two interfaces
on it. It has "Mic In" and "Headphones".
The manual mentions a setting of
"Please select Front Mic as default recording source"
It could be, that once you're selecting "Front Mic", the rear microphone
input can be redefined as an output.
A similar issue might arise, if you attempted to select "Line In" while
in 6 channel mode. I doubt the driver would like that either. You have
to "clear the decks" of all input modes on the rear jacks, to get 5.1 mode.
By selecting "Front Mic" as the sole input source, the rear jacks should
all be outputs.
The manual mentions another setting...
"Disable Front Panel jack detection"
HDAudio uses isolated switches on the side of the jacks. When a plug
is inserted in the jack hole, the body of the plug presses on a switch.
Up to four switches are combined together in s sensing tree. Using two
sense wires, the audio chip can sense the state of eight switches. The "Disable
Front Panel jack detection" is disabling that function. The reason for
this, is the majority of computer cases lack the correct wiring for
that function. The computer cases are usually wired for AC'97 and not
for HDAudio.
I have an ALC662 on my current motherboard, and I don't see any
symptoms of having jack detection on mine. I just plugged in three
audio cables to my rear jacks, and the audio control panel didn't react
at all. On my Soundmax audio motherboard, the Soundmax software would
say something cute like "what did you just plug in". The Soundmax has
impedance sensing, and it can detect a 10K ohm amplified computer speaker,
or can detect a 32 ohm set of headphones. At least on my ALC662 right now,
it doesn't notice when the plugs are inserted. So it may not have
impedance sensing as a backup system to the "isolated switch inside the jack"
thing.
That is why in my answer above, I'm focusing on the conflict between
jack definitions. By telling the audio chip, that you're using a front
microphone, it is going to stop thinking about the rear jack as a
microphone. It doesn't matter that no microphone is plugged into
the FP_Audio header on the motherboard. It's more a matter of fooling
the chip into thinking that is where the microphone is located. If
the chip had impedance sensing, it may have been able to determine
you were telling a lie
I actually hate the hardware notion of
jack sensing, because more often than not, it conflicts with a
user's ability to get things done. It is automation without purpose.
HTH,
Paul
