Re: [iPAQ] Audio driver questions

On Fri, 1 Sep 2000, Carl Worth wrote:

> Greetings to the iPAQ pack,
>
> I have been experimenting with the audio capabilities of the iPAQ
> under Linux. Here are my observations so far:
>
> 1) The speaker is on all the time. If you put your ear close
> to the speaker you can hear some light static. Isn't this
> wasting power? Is this avoidable? Is there a way to turn
> the speaker off?

Yes, yes and yes. Simply not done right ATM. The DAC power could be
shut off when there is no opened instance of the audio driver. However
the UDA1341 settings would need to be remade once the device is opened
i.e. the chip repowered to keep mixer settings consistency.

> 2) Volume control does not seem to work. I tried the volume
> slider in gqmpeg and it had no effect. Next, I downloaded
> smixer, a small command-line mixer from:
>
> http://centerclick.org/programs/smixer/
>
> It compiles out-of-the box on skiffcluster and runs on the
> iPAQ just fine. It will report a volume, (say 70%), allow
> me to set the volume, (say to 25%), and then query the
> mixer again, (and report 25%). So some number seems to be
> getting stored somewhere, (a hardware register
> hopefully). However, the actual volume I hear is not any
> different.

It works on Assabet, and shouldnt be different on iPaq. I didn't try
Linux on my Ipaq yet (waiting for the flash issue to be resolved).

Nicolas
Received on Fri Sep 1 12:59:10 2000