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Author Topic: Can FP audio header give sound to an internal speaker?  (Read 13495 times)

Glitch

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Can FP audio header give sound to an internal speaker?
« on: September 06, 2009, 02:39:03 PM »

Hey I was wondering if I would get sound if I connect a speaker to the Front (L), Front (R) and Ground pins on the Front panel audio header?
I'm making an itx build and I want it to have internal audio, I have a 3W speaker and a small amplification board for it but I need an audio line in. So instead of running a 3.5mm jack from the outside because it looks tacky and I'm already forced to do that with the vga line :(, so one cable is enough. I want to just connect it to the header, also if that does work does anyone know if I'll still be able to get audio from the rear connectors? or will the system sense something is connected to the front audio and mute the rear?

http://s632.photobucket.com/albums/uu49/Mcstikman/?action=view&current=pinlayout.jpg
This a diagram of the header layout, BTW its a realtek chip
« Last Edit: September 06, 2009, 02:51:09 PM by Glitch »
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Glitch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #1 on: September 06, 2009, 03:32:15 PM »

Also the amplifier needs 12v @ 1A, it should be fine running off the pc PSU right? PSU has 12Vx2 @16A each.
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Glitch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #2 on: September 06, 2009, 05:31:48 PM »

Also the amplifier needs 12v @ 1A, it should be fine running off the pc PSU right? PSU has 12Vx2 @16A each.


Well forget this post, tried it and nothing but sparks I am not sure why, 12v and Gnd were connected correctly. Btw way psu still fired up after a few more attempts, the fan came on but not sure about the rest of the voltages. Will just have to use an external 12v psu.
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blafrisch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #3 on: September 07, 2009, 01:59:55 PM »

There should be no issue powering a 12V DC amp off of the PSU.  Are you sure that it was wired correctly?  I've had various devices powered off of a PC PSU before and never had sparks as an issue.

And yes, you should just be able to use Front L/R and GND from the header.
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Glitch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #4 on: September 07, 2009, 04:04:51 PM »

Yea I doubled checked and triple checked before I connected it, everytime I connect the amp it shorts out the psu, when I disconnect it after a couple tries of turning on the psu it start backs working. When I try the amp with an external 12v psu it runs fine  :-? so I have no idea why it does that. I tried the amp a total of 3 times and it shorted the psu all 3 times. I even switched the wires around just to check if it was my errror and it still shorted. I won't dare try it again (fear of burning out the psu as it is the only one I have to spare for this build)

Btw thanks for the conformation on the header.

I didn't keep a project log but I will post pics of the finished project "ITX TV", I recently discovered my ati tv tuner is not clearing my big boy 200mm fan by about 7mm  :( so I'm a crossroad right now.
 
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bliq

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Re: Can FP audio header give sound to an internal speaker?
« Reply #5 on: September 09, 2009, 07:02:46 PM »

are you routing the VGA back into the case?  If you want to avoid this, I understand that there are 7" LCDs that run off the USB port.  maybe you can attach one to one of the USB headers inside the case.  Not sure about performance or image quality.
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Glitch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #6 on: September 09, 2009, 10:32:11 PM »

are you routing the VGA back into the case?  If you want to avoid this, I understand that there are 7" LCDs that run off the USB port.  maybe you can attach one to one of the USB headers inside the case.  Not sure about performance or image quality.

Well yea I am routing the vga back into the case. I'm using a 15" dell monitor (it was free so I believe the cable is a small price to pay  :lol:). BTW I'm almost done just need a way to secure my tuner without cutting the metal bracket (even though it's low profile the bastards didn't include the low profile adapter) so now it sticks up by about an inch  : :undec:
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Glitch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #7 on: September 11, 2009, 07:34:33 PM »

Does anyone know if the Realtek  ALC662 Audio chip can send audio to the front port and rear port simultaneosly?. Since I wont be connecting the all the pins on the header, just the Front(L) Front(R) and Gnd, would I still get audio from the rear? I know there are is a jack sensing pin which detects when the front port is connected and auto shuts off the rear but since that pin is not connected would the system still shut off the audio to the rear after I connect the internal speaker?

I would like the option of connecting external speakers at any time without opening the system to disconnect the header.
« Last Edit: September 11, 2009, 08:08:21 PM by Glitch »
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Glitch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #8 on: September 12, 2009, 04:23:30 PM »

Tried the audio thing and I get no sound what so ever from the header, the sound from the rear is fine. Also my ATI theatre 550 is making this horrible high pitched squealing sound, is this normal? My mom says she can't hear it but my ears are about to bleed ( I have really sensitive ears)
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Chieftec Dragon (slighty modded)
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IT AIN"T OCed IF IT AIN"T A LITTLE UNSTABLE

Glitch

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Re: Can FP audio header give sound to an internal speaker?
« Reply #9 on: September 13, 2009, 06:29:01 PM »

Random case progess pics






stupid hardware store guy cut the perspex too short :x





« Last Edit: September 13, 2009, 06:37:21 PM by Glitch »
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Chieftec Dragon (slighty modded)
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IT AIN"T OCed IF IT AIN"T A LITTLE UNSTABLE
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