Subject: Re: More on our AC'97 modem support in auich(4)
To: None <M.Drochner@fz-juelich.de>
From: Jared D. McNeill <firstname.lastname@example.org>
Date: 04/26/2005 13:02:08
On Tue, 2005-04-26 at 11:25 +0200, Matthias Drochner wrote:
> email@example.com said:
> > It would be great if we got slmodem-2.9.9b up and running on NetBSD to
> > the point where we can do PPP over it!
> -The frequencies (analyzed DTMF tones coming out at the other end)
> are off by about 20%. If I set the sample rate to 9600, it looks
> pretty correct. The driver needs a modification to allow this.
Does this happen with mpg123 also?
> -I'm not sure whether some in-kernel rate conversion gets in between.
> We should make sure that doesn't happen, it probably doesn't do
> any good. The code is rather confusing, and it is probably not worth
> investing time here because the audio middle layer is being reworked
The hw driver is responsible for deciding which filters to use. I'll
double-check the logic in the modem path of auich.
> -The gain/mixer stuff has problems: The mapping of 4-bit
> hardware values to the user visible 0..255 range loses a bit
> somewhere, and settings get lost on SETINFO calls unexpectedly.
How loud does the modem have to be for this to work?