"HD Audio" or "AC97" front panel?
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From: Ronald Cole on 13 May 2006 19:13 What's the difference? A cursory look on Intel's site shows the same 2x5 header with the same missing pin. I bought an Antec Sonata II case and the manual doesn't tell me which front panel type I have. But the BIOS on my P5WD2-E Premium demands to know! I've googled ASUS, Antec, the web and usenet to no avail. Shirley, I'm not the first person to ask this question (at least publicly), am I? What do I tell my BIOS?!? -- Forte International, P.O. Box 1412, Ridgecrest, CA 93556-1412 Ronald Cole <ronald(a)forte-intl.com> Phone: (760) 499-9142 President, CEO Fax: (760) 499-9152 My GPG fingerprint: C3AF 4BE9 BEA6 F1C2 B084 4A88 8851 E6C8 69E3 B00B
From: Anthony Horan on 13 May 2006 23:38 On Sat, 13 May 2006 16:13:25 -0700, Ronald Cole wrote: > What's the difference? A cursory look on Intel's site shows the same > 2x5 header with the same missing pin. > > I bought an Antec Sonata II case and the manual doesn't tell me which > front panel type I have. But the BIOS on my P5WD2-E Premium demands > to know! I've googled ASUS, Antec, the web and usenet to no avail. > Shirley, I'm not the first person to ask this question (at least > publicly), am I? What do I tell my BIOS?!? In my experience (with the P5LD2 in the Sonata II case) it makes no difference. I just set mine to HD Audio and forgot about it. All works as it should.
From: Paul on 13 May 2006 23:40 In article <m3r72x1pt6.fsf(a)yakisoba.forte-intl.com>, Ronald Cole <ronald(a)forte-intl.com> wrote: > What's the difference? A cursory look on Intel's site shows the same > 2x5 header with the same missing pin. > > I bought an Antec Sonata II case and the manual doesn't tell me which > front panel type I have. But the BIOS on my P5WD2-E Premium demands > to know! I've googled ASUS, Antec, the web and usenet to no avail. > Shirley, I'm not the first person to ask this question (at least > publicly), am I? What do I tell my BIOS?!? ttp://www.antec.com/pdf/manuals/SonataII_En.pdf 1. Microphone Signal Pin: Connect the MIC connector to this pin. 2. Microphone Power: Connect the MIC-BIAS connector to this pin. 3. Ground Pin: Connect the AUD GND connector to this pin. 4. Front Right Speaker Out Pin: Connect the FPOUT-R connector to this pin. 5. Front Right Speaker Out Pin: Connect the FPOUT-L connector to this pin. 6. Rear Right Speaker Out Pin: Connect the RET-R connector to this pin. 7. Rear Left Speaker Out Pin: Connect RET-L connector to this pin. That is an AC-97 set of signals. Set the BIOS for AC-97 and wire according to AC-97 signal names ("AC-97 audio pin definition" in the manual). There is no place to hook up RET-R and RET-L and they are left dangling. The HDAudio chip switches audio at the chip, so the mute function provided by RET-R and RET-L (which are not hooked up), would have to be emulated by the HDAudio chip. It means the HDAudio needs to be able to "detect" that headphones are plugged into the headphone jack, in order for the software to turn off the green speaker output. If your HDAudio chip cannot do that for you, it would mean the speakers and headphones would run at the same time. The HDAudio pinout standard has some sense pins for switch closures, and that is how it can tell headphones have been plugged in. It means a computer case manufacturer has to use audio jacks, that have a separate contact pair that indicates a plug has been inserted. I have yet to see a computer case, with "HDAudio" wiring (in my casual travels helping people hook up that stuff - I'm not a pro builder). If the computer case has several wires with the word "SENSE" in the name, then that computer case may in fact be HDAudio ready. I'm still waiting to see one. HTH, Paul
From: Ronald Cole on 14 May 2006 03:47 nospam(a)needed.com (Paul) writes: > In article <m3r72x1pt6.fsf(a)yakisoba.forte-intl.com>, Ronald Cole > <ronald(a)forte-intl.com> wrote: > >> What's the difference? A cursory look on Intel's site shows the same >> 2x5 header with the same missing pin. >> >> I bought an Antec Sonata II case and the manual doesn't tell me which >> front panel type I have. But the BIOS on my P5WD2-E Premium demands >> to know! I've googled ASUS, Antec, the web and usenet to no avail. >> Shirley, I'm not the first person to ask this question (at least >> publicly), am I? What do I tell my BIOS?!? > > ttp://www.antec.com/pdf/manuals/SonataII_En.pdf > > 1. Microphone Signal Pin: Connect the MIC connector to this pin. > 2. Microphone Power: Connect the MIC-BIAS connector to this pin. > 3. Ground Pin: Connect the AUD GND connector to this pin. > 4. Front Right Speaker Out Pin: Connect the FPOUT-R connector to this pin. > 5. Front Right Speaker Out Pin: Connect the FPOUT-L connector to this pin. > 6. Rear Right Speaker Out Pin: Connect the RET-R connector to this pin. > 7. Rear Left Speaker Out Pin: Connect RET-L connector to this pin. > > That is an AC-97 set of signals. Set the BIOS for AC-97 and > wire according to AC-97 signal names ("AC-97 audio pin definition" > in the manual). There is no place to hook up RET-R and RET-L and > they are left dangling. The HDAudio chip switches audio at the > chip, so the mute function provided by RET-R and RET-L (which > are not hooked up), would have to be emulated by the HDAudio > chip. It means the HDAudio needs to be able to "detect" that > headphones are plugged into the headphone jack, in order for > the software to turn off the green speaker output. If your > HDAudio chip cannot do that for you, it would mean the speakers > and headphones would run at the same time. > > The HDAudio pinout standard has some sense pins for switch > closures, and that is how it can tell headphones have been plugged > in. It means a computer case manufacturer has to use audio jacks, > that have a separate contact pair that indicates a plug has > been inserted. > > I have yet to see a computer case, with "HDAudio" wiring > (in my casual travels helping people hook up that stuff - I'm not > a pro builder). If the computer case has several wires with the > word "SENSE" in the name, then that computer case may in fact be > HDAudio ready. I'm still waiting to see one. Ok, I think I figured out where I got confused... The motherboard manual shows a diagram with two 5x2 pinouts: one with nine connections and one with five connections, and labels the five connection pinout "AC'97 audio pin definition." However, the Sonata II manual shows seven connections and calls it an "Intel standard 10-pin connector"! On closer inspection, I couldn't find any "Rear Speaker" jack on the front panel of the Sonata II case (although I have yet to remove the front case cover to see just where the wires connected to those two rear speaker pins go to). I'll accept that it appears to be an AC'97 front panel in every other respect. Thanks for the reply! -- Forte International, P.O. Box 1412, Ridgecrest, CA 93556-1412 Ronald Cole <ronald(a)forte-intl.com> Phone: (760) 499-9142 President, CEO Fax: (760) 499-9152 My GPG fingerprint: C3AF 4BE9 BEA6 F1C2 B084 4A88 8851 E6C8 69E3 B00B
From: Paul on 14 May 2006 07:10 In article <m37j4p120x.fsf(a)yakisoba.forte-intl.com>, Ronald Cole <ronald(a)forte-intl.com> wrote: > > Ok, I think I figured out where I got confused... The motherboard > manual shows a diagram with two 5x2 pinouts: one with nine connections > and one with five connections, and labels the five connection pinout > "AC'97 audio pin definition." However, the Sonata II manual shows > seven connections and calls it an "Intel standard 10-pin connector"! > On closer inspection, I couldn't find any "Rear Speaker" jack on the > front panel of the Sonata II case (although I have yet to remove the > front case cover to see just where the wires connected to those two > rear speaker pins go to). I'll accept that it appears to be an AC'97 > front panel in every other respect. > > Thanks for the reply! The Sonata seven wires minus RET-R and RET-L, should fit with the five pins listed in the Asus manual for AC-97. The history of this, is contained in some formfactors.org documents. The problem is, when Intel wrote their HDaudio spec, they decided to redefine the AC-97 pinout of the 2x5. If Intel wanted a few sense pins, it would have been better to just add another small header with the necessary signals on it. That would be less confusing for the consumer (of course, DIY builders are insignificant in the minds of the big companies). These two docs, somewhere around page 19, contain some info. (AC-97 header - archived doc) http://web.archive.org/web/20040407073715/http://www.formfactors.org/developer/specs/fpio_design_guideline.pdf (HDaudio header) http://www.formfactors.org/developer\specs\A2928604-005.pdf I don't know what the BIOS setting "Front Panel Support Type" is doing. To figure that out, I'd have to dump the registers for the audio, to see if the setting makes any difference to the register contents. Because otherwise, I don't see how the BIOS is going to be doing anything to the audio. It must be a parameter passing thing of some sort. But what would they be passing ? Paul
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