On Thu, 26 Dec 2002, Patrick Burns wrote:
> Hello.
>
> I have a Gigabyte motherboard (GA7DXR+) with an integrated
> Ensoniq/Creative CT5880 AudioPCI sound card. Here is the lspci output:
>
> 00:0e.0 Multimedia audio controller: Ensoniq CT5880 [AudioPCI] (rev 04)
> Subsystem: Giga-byte Technology: Unknown device a001
> Flags: bus master, slow devsel, latency 32, IRQ 12
> I/O ports at e400 [size=64]
> Capabilities: [dc] Power Management version 2
>
> I am currently using the ens1371 driver from the alsa-driver-0.9.6rc6
> tarball (built from source) with Kernel 2.4.14 on Redhat 7.2
>
> My question is about using the line-in on the back of the sound card as
> a second output for four channel sound. The ens1371 driver provides two
> pcm devices, Device 0 for playback and capture and Device 1 for
> playback. snd-pcm-oss properly maps these devices to /dev/dsp0 and
> /dev/adsp0, and sound played through both devices comes out the line-out
> (front channels).
>
> The motherboard manual indicates that the sound card is able to produce
> four channel sound by using the line-out for the two front channels and
> the line-in for the rear two channels. The Windows drivers for this card
> support this. alsamixer also provides controls for the "surround"
> channels and separate "3D" controls for the front and surround channels.
>
> I assume using the line-in as a second output requires driver support to
> switch this feature on. I noticed a feature in the driver called "Line
> in to AOUT", but this is ifdef'd to only work with a 1370 chip (I
> believe the CT5880 is a 1373.) Would it be difficult to add this
> feature? Is it documented by Creative?
We have no info about four channels mode for ES1373.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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