From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m4NBHpGP024466 for ; Fri, 23 May 2008 07:17:51 -0400 Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by mx3.redhat.com (8.13.8/8.13.8) with SMTP id m4NBHHmY011889 for ; Fri, 23 May 2008 07:17:32 -0400 Date: Fri, 23 May 2008 13:17:09 +0200 From: Steve S To: video4linux Message-ID: <20080523111709.GA4796@ramrod.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: cx88: white noise with audio cable; no sound with cx88-alsa List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: video4linux-list-bounces@redhat.com Errors-To: video4linux-list-bounces@redhat.com List-ID: Hi all. This is my first post, so please be gentle :) I have a WinTV PCI card with a cx88 chip. -------------------------------------------- 00:0f.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder (rev 03) 00:0f.1 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [Audio Port] (rev 03) -------------------------------------------- $ cat /proc/asound/cards 0 [V8235 ]: VIA8233 - VIA 8235 VIA 8235 with ALC650E at 0xe000, irq 19 1 [CX8811 ]: CX88x - Conexant CX8811 Conexant CX8811 at 0xd2000000 -------------------------------------------- /etc/asound.names: ctl { alsactl1 { name hw:0 comment 'Physical Device - VIA 8235 with ALC650E at 0xe000, irq 19' } alsactl2 { name hw:1 comment 'Physical Device - Conexant CX8811 at 0xd2000000' } } [...] -------------------------------------------- I have 2 issues: 1) Right now, I'm capturing the sound using the analog audio cable that's plugged into my onboard soundcard line-in (the VIA chip). At boot, I hear white (static) noise coming from the line out of the TV card. If I start my TV app (tvtime), the noise is replaced by the normal TV sound. When I close the TV app, the noise is gone. 2) After a lot of searching the net, I was not able to track this issue down. So I thought I try to capture the sound in another way. According to [1,2], I should be also able to capture the sound via the cx88-alsa module. The only difference seems to be that I have rev 3, not rev 5. I've read a lot about redirecting the sound from the TV card but I feel a bit lost here. I tried $ sox -c 2 -t alsa hw:1 -t alsa hw:0 $ arecord -D hw:1 -c 2 -r 48000 -f S16_LE -t wav | aplay - They all play nothing but silence. So, is this even possible with my card? My system: Debian testing, kernel compiled from from Debian kernel sources (linux-source-2.6.24-6). If you need more information, please say so. I'd be happy to provide as much as I can, I just don't know where to start :) Many thanks! steve [1] http://www.linuxtv.org/v4lwiki/index.php/Cx88_devices_(cx2388x) [2] http://www.mythtv.org/wiki/index.php/PCI_TV_audio -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list