Recording with asus xonar essence st card

Recording with asus xonar essence st card

[Vasily Postnicov]

Hello. This is not related to alsa, but I decided to write this message
here, because as far as I know alsa has the best open source driver for
asus xonar series. I am using DragonFlyBSD and a bit modified driver
originally written for FreeBSD by Alexander Polakov
https://github.com/shamazmazum/xonar-dragonfly

It lacks support for recording. I am trying to add this functionality from
alsa/OSS drivers, but I have some unanswered questions. There are they here:

1) How do I  initialize my soundcard for recording properly? I think I must
enable CS5381 ADC using GPIO registers,  but what are OXYGEN_REC_ROUTING,
OXYGEN_ADC_MONITOR and OXYGEN_A_MONITOR_ROUTING for? Does MONITOR mean the
same thing as in the user manual? If ROUTING registers are just switches
for source of a signal to be recorded, is it enough to use
OXYGEN_REC_B_ROUTE_I2S_ADC_2 for ST card to record from line-in/mic jack?

2) How do I control volume of sound while recording? Have Xonar Essence
cards any controls for this? I cannot find it out looking at oxygen_mixer.c

Re: Recording with asus xonar essence st card

[Clemens Ladisch]

Vasily Postnicov wrote:
> 1) How do I  initialize my soundcard for recording properly? I think I must
> enable CS5381 ADC using GPIO registers

These two bits only select the frequency.

> but what are OXYGEN_REC_ROUTING, OXYGEN_ADC_MONITOR and
> OXYGEN_A_MONITOR_ROUTING for? Does MONITOR mean the same thing as
> in the user manual?

The Windows driver implements monitoring in software, but it means
the same.

> If ROUTING registers are just switches for source of a signal to be
> recorded, is it enough to use OXYGEN_REC_B_ROUTE_I2S_ADC_2 for ST card
> to record from line-in/mic jack?

You also have to configure the routing of all the signals that can end
up at the input of the ADC.  See the comment at the beginning of
xonar_pcm179x.c.

> 2) How do I control volume of sound while recording?

The aux and mic inputs go through the analog mixer section of the
AC'97 codec, but the line input bypasses that and has no control.
(The DAC and ADC of the AC'97 codec are not used.)


Regards,
Clemens