Re: pchdtv 3000 cx88 audio very very low level
From: Michael Krufky
Date: Mon Apr 10 2006 - 19:55:27 EST
Andreas Mohr wrote:
Hi,
On Fri, Apr 07, 2006 at 09:06:42AM -0400, Greg Stark wrote:
Andreas Mohr <andi@xxxxxxxxxxxxxxxxxxxxxxx> writes:
IOW, you need to examine the driver sources of cx88xx, cx8800, cx88_alsa,
btcx_risc, tveeprom (?) for some multiplexer bit mask and tweak/twiddle that
for your tuner until you manage to hear something properly.
Hm. Except nobody else seems to have this problem with the pchdtv 3000 card.
And there are plenty of HOWTOs and FAQs online for it. Perhaps nobody else is
trying to use the NTSC tuner on it though.
A distant possibility might be that your card is a very specific rare revision
of that thing and thus doesn't have a proper card type entry for it due to
almost nobody else having that card.
In the TV card area (just as in the WLAN card area) there are quite some cards
sold under the *very same* name but wildly (or not so wildly but sufficiently)
differing hardware (those manufacturer b****rds burn in hell please, thanks).
I'm assuming that if cx88_alsa found any audio devices on the card then it
would create a card1 listed in /proc/asound/cards ? It isn't doing that
currently. Apparently not all cx88 cards provide a mixer interface.
I'm not that familiar with ALSA user-space interface specifics (rather than
kernel-level), sorry.
We have recently discovered that the programming for the pcHDTV3000 card
was based on a prototype that used the Thomson DTT7610 tuner, and that
this particular version of the card has never gone into production.
The actual version of the card in circulation uses the Thomson DTT7612
... You do not need a patch to correct this on your machine, at least
not for analog NTSC mode. Just load your driver as follows:
modprobe cx88xx tuner=60 (it will use tuner 52 by default)
modprobe cx8800
Tuner #52 is the previous tuner defined for this card, DTT7610, and
tuner #60 is configured for Thomson DTT 7611 7611A 7612 7613 7613A 7614
7615 7615A
The configuration for this card has been fixed in the v4l-dvb mercurial
tree as of this morning. To update your v4l/dvb modules (so long as you
are running kernel 2.6.12 or later) follow the directions here:
http://linuxtv.org/repo/
I hope this helps,
Michael Krufky
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