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Front Panel Audio - Help
Hi all,
I've just aquired a front panel that has a Card Reader, USB, Firewire and Audio. I've got the Card Reader, USB and Firewire working great but I can't work out the audio connections. My motherboard is an MSI 848p Neo-V (AC97) with the following JAUD1 front panel connection pins: 1 AUD_MIC 2 AUD_GND 3 AUD_MIC_BIAS 4 AUD_VCC 5 AUD_FPOUT_R 6 AUD_RET_R 7 HP_ON 8 KEY 9 AUD_FPOUT_L 10 AUD_RET_L The front panel audio lead has connectors that are as marked follows: 1 MIC-R 2 MIC-L 3 FRONT-R 4 FRONT-L 5 REAR-R 6 REAR-L 7 GND 8 BASS 9 CENTER After connecting logically, I have no sound from the back panel at all but can get sound if I plug headphones into the Front Out jack on the panel. I was hoping to get sound from the back for normal speakers but then get sound from headphones plugged into the front panel. AFAIK, plugging in headphones should disable the rear panel sound. Also, it would appear that the 'Mic In' on the front panel doesn't work either, or if it does, it's extremely quiet. I've looked in the motherboard manual but other than saying that if pins 5+6 and 9+10 are jumpered, the signal is directed towards the back panel, it basically just lists the pins and their labels. It would appear that to connect the FP lead, the jumpers on 5+6 and 9+10 have to be removed. Any guidance as to which connector goes onto which pin to get the desired result would be very much appreciated. Thanks in advance, Victor |
#2
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Front Panel Audio - Help
In alt.comp.hardware.pc-homebuilt "Victor Papa"
wrote: Hi all, I've just aquired a front panel that has a Card Reader, USB, Firewire and Audio. I've got the Card Reader, USB and Firewire working great but I can't work out the audio connections. My motherboard is an MSI 848p Neo-V (AC97) with the following JAUD1 front panel connection pins: 1 AUD_MIC 2 AUD_GND 3 AUD_MIC_BIAS 4 AUD_VCC 5 AUD_FPOUT_R 6 AUD_RET_R 7 HP_ON 8 KEY 9 AUD_FPOUT_L 10 AUD_RET_L As I recall, on many motherboards you have to jumper the "out" to the "ret" or something like that. I think it's intended for front-panel connectors that have disconnecting-jacks; so if you plug in the front-panel, the rear connecter automatically gets disconnected. They usually come with a set of jumpers or a jumper-plug for use if you don't have the proper front-panel. The front panel audio lead has connectors that are as marked follows: 1 MIC-R 2 MIC-L 3 FRONT-R 4 FRONT-L 5 REAR-R 6 REAR-L 7 GND 8 BASS 9 CENTER After connecting logically, I have no sound from the back panel at all but can get sound if I plug headphones into the Front Out jack on the panel. I was hoping to get sound from the back for normal speakers but then get sound from headphones plugged into the front panel. AFAIK, plugging in headphones should disable the rear panel sound. Also, it would appear that the 'Mic In' on the front panel doesn't work either, or if it does, it's extremely quiet. I've looked in the motherboard manual but other than saying that if pins 5+6 and 9+10 are jumpered, the signal is directed towards the back panel, it basically just lists the pins and their labels. It would appear that to connect the FP lead, the jumpers on 5+6 and 9+10 have to be removed. Any guidance as to which connector goes onto which pin to get the desired result would be very much appreciated. Thanks in advance, Victor -- _____ / ' / â„¢ ,-/-, __ __. ____ /_ (_/ / (_(_/|_/ / _/ _ |
#3
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Front Panel Audio - Help
Victor Papa wrote:
Hi all, I've just aquired a front panel that has a Card Reader, USB, Firewire and Audio. I've got the Card Reader, USB and Firewire working great but I can't work out the audio connections. My motherboard is an MSI 848p Neo-V (AC97) with the following JAUD1 front panel connection pins: 1 AUD_MIC 2 AUD_GND 3 AUD_MIC_BIAS 4 AUD_VCC 5 AUD_FPOUT_R 6 AUD_RET_R 7 HP_ON 8 KEY 9 AUD_FPOUT_L 10 AUD_RET_L The front panel audio lead has connectors that are as marked follows: 1 MIC-R 2 MIC-L 3 FRONT-R 4 FRONT-L 5 REAR-R 6 REAR-L 7 GND 8 BASS 9 CENTER After connecting logically, I have no sound from the back panel at all but can get sound if I plug headphones into the Front Out jack on the panel. I was hoping to get sound from the back for normal speakers but then get sound from headphones plugged into the front panel. AFAIK, plugging in headphones should disable the rear panel sound. Also, it would appear that the 'Mic In' on the front panel doesn't work either, or if it does, it's extremely quiet. I've looked in the motherboard manual but other than saying that if pins 5+6 and 9+10 are jumpered, the signal is directed towards the back panel, it basically just lists the pins and their labels. It would appear that to connect the FP lead, the jumpers on 5+6 and 9+10 have to be removed. Any guidance as to which connector goes onto which pin to get the desired result would be very much appreciated. Thanks in advance, Victor This is the fault of your computer case wiring. The nine pins listed are not an "Intel-compatible" configuration. I typed up some notes on this not long ago: http://groups.google.ca/group/alt.co...c?dmode=source Your case wiring is yet another variation. It looks like it is intended for a 5.1 front panel setup, where as the motherboard is set up for stereo (headphones). So the computer case 5.1 wiring is not likely to find anything to plug into, inside the computer. That means your usable wires, of the nine you list, are these five. The other four can be left dangling inside the computer case. Only the "front" jack will work for the headphones. Plugging in headphones will not operate a mute function. With only five wires on the computer csae, you are missing the return wires. Which is why the green connector on the back of the computer no longer works. 1 MIC-R 2 MIC-L 3 FRONT-R 4 FRONT-L 7 GND When connected, they'd look something like this: MIC-L X X GND MIC-R X X Front-R X X (return wires are missing!) X Front-L X X (return wires are missing!) MIC-L should correspond to the "Tip" of the 1/8" microphone plug. It carries the actual monophonic microphone signal. MIC-R is the microphone bias, a form of power supply. Usually, it is a 5V supply, with a 2K ohm series resistance. If you plug in an "electret" microphone, that kind of microphone uses the small amount of available power, to amplify the signal. The electret will give a decent, high level signal. For other microphone types, you may need to actuate the "Mic boost" checkbox in the audio interface. There is the odd bit of motherboard audio, where there is no boost, but for many of them, it is merely a well hidden setting. MIC-R corresponds to the "Ring" contact of the 1/8" microphone plug. GND goes to the "Sleeve" contact of both the headphone and the microphone jacks. If you wish the headphone ("Front") jack, and the speakers to work at the same time, you'll need to wire across, like there were jumpers in place. In other words, not only do you have to connect Front-R and Front-L as shown, you also need to jumper as shown by the - in the picture. Some very fine wire wrapped around the pins is one way to do it. Soldering to the back of the motherboard, and bridging where the jumpers normally go, is another way to permanently leave the green rear speaker jack enabled. MIC-L X X GND MIC-R X X Front-R X-X (return wires are missing!) X Front-L X-X (return wires are missing!) And if you remove the computer case wiring assembly, and put the two jumpers back in place, that also will restore the operation of the green rear speaker jack. Paul |
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Front Panel Audio - Help
Paul,
Thanks for that - I'll have a go at wiring across the pins soon and see what I can come up with. Victor "Paul" wrote in message ... This is the fault of your computer case wiring. The nine pins listed are not an "Intel-compatible" configuration. I typed up some notes on this not long ago: Paul |
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