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cl10k

Member

From: Germany

Registered: 2008-12-24

Posts: 92

Zotac Ion ITX Motherboard - "Routing Audio Output"

Hello,

I own a Zotac Atom motherboard. There are 3 audio outputs. Currently I use alsa and my stereo speakers are connected to the front channel. The problem is I also own headphone but none of the two other connectors give any output. There is a windows software for my motherboard which allows to "route" the output connectors to p.e. a microphone (as Input) or to headphones.

How can this be achieved under Linux?

Thx in advance

cl10k

lspci:

00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)
    Subsystem: PC Partner Limited Device 437b
    Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 20
    Memory at fae78000 (32-bit, non-prefetchable) [size=16K]
    Capabilities: <access denied>
    Kernel driver in use: HDA Intel
    Kernel modules: snd-hda-intel

Last edited by cl10k (2010-12-25 16:34:57)

lagagnon

Member

From: an Island in the Pacific...

Registered: 2009-12-10

Posts: 1,087

Website

Re: Zotac Ion ITX Motherboard - "Routing Audio Output"

You need to create a ~/.asoundrc file to reroute. I use this one to give me 5.1 channel sound from the 3 outputs. How you could change it to get headphone outputs I don't really know as I took this .asoundrc file from a Google search on how to do it. PS - I have almost the same audio chip as you (MCP78S). I suggest you can find the answer somewhere - this is at least a start that you can hack from....

pcm.hda-intel {
    type hw
    card 0
}

ctl.hda-intel {
    type hw
    card 0
}

pcm.ch51dup {
         slave.pcm surround51
         slave.channels 6
         type route
         ttable.0.0 1
         ttable.1.1 1
         ttable.0.2 1
         ttable.1.3 1
         ttable.0.4 0.5
         ttable.1.4 0.5
         ttable.0.5 0.5
         ttable.1.5 0.5
}

pcm.ch41dup {
         type route
         slave.pcm surround41
         slave.channels 5
         ttable.0.0 1
         ttable.1.1 1
         ttable.0.2 1
         ttable.1.3 1
         ttable.0.4 0.5
         ttable.1.4 0.5

---

Philosophy is looking for a black cat in a dark room. Metaphysics is looking for a black cat in a dark room that isn't there. Religion is looking for a black cat in a dark room that isn't there and shouting "I found it!". Science is looking for a black cat in a dark room with a flashlight.

cl10k

Member

From: Germany

Registered: 2008-12-24

Posts: 92

Re: Zotac Ion ITX Motherboard - "Routing Audio Output"

Thx Lagagnon - I will take a look at asoundrc!