At Mon, 2 Jul 2007 16:25:12 -0600, Howdy Pierce wrote: > > I'm encountering the following problem on Fedora Core 6 running on a Dell > Optiplex 745. This is a pretty vanilla computer with an ICH8 chipset and > integrated AD1983 sound capabilities. > > I have wired up a funky line-input cable so that I have completely separate > audio sources playing on the left and right inputs. > > When I either play these through to the speaker output directly (using > alsamixer), or record the audio using arecord, the result is that there is a > slight bit of bleeding or crossover, so I can faintly hear the left input on > the right channel, and vice versa. If I record a wav file and then play it > on another computer, the left/right bleeding follows the wav file, so it > seems that the problem is in the capture process somehow. > > When I install Windows XP onto the same machine, the problem disappears, so > I can rule out hardware errors. > > The application I'm working on relies on being able to reliably capture the > right and left channels of audio independently. Since the problem can be > seen using the standard arecord/aplay tools, though, I don't think it's my > code. > > I've tried all the possible combinations inside alsamixer, and I don't think > there's anything I've messed up there. > > I've put the relevant system details below. Thanks for any help you can > provide. To investigate where the problem exists, try to use "hw" PCM first without alsa-lib plugins. If the problem still remains, it's in the driver (that I don't expect since your codec dump looks sane to me). Takashi > > --Howdy > > ============================= > Howdy Pierce > Managing Partner > Cardinal Peak, LLC > > work: (303) 665-3962 x101 > cell: (303) 589-1645 > email: howdy@xxxxxxxxxxxxxxxx > web: www.cardinalpeak.com > ============================= > > > [root@dundee ~]# cat /proc/asound/cards > 0 [Intel ]: HDA-Intel - HDA Intel > HDA Intel at 0xdfdfc000 irq 169 > > [root@dundee ~]# cat /proc/asound/devices > 2: : timer > 3: : sequencer > 4: [ 0- 1]: digital audio playback > 5: [ 0- 0]: digital audio playback > 6: [ 0- 0]: digital audio capture > 7: [ 0] : control > > [root@dundee ~]# lspci > 00:00.0 Host bridge: Intel Corporation 82Q963/Q965 Memory Controller Hub > (rev 02) > 00:01.0 PCI bridge: Intel Corporation 82Q963/Q965 PCI Express Root Port (rev > 02) > 00:02.0 Display controller: Intel Corporation 82Q963/Q965 Integrated > Graphics Controller (rev 02) > 00:02.1 Display controller: Intel Corporation 82Q963/Q965 Integrated > Graphics Controller (rev 02) > 00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #4 > (rev 02) > 00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #5 > (rev 02) > 00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI #2 > (rev 02) > 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio > Controller (rev 02) > 00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port > 1 (rev 02) > 00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port > 5 (rev 02) > 00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #1 > (rev 02) > 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #2 > (rev 02) > 00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #3 > (rev 02) > 00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI #1 > (rev 02) > 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev f2) > 00:1f.0 ISA bridge: Intel Corporation 82801HB/HR (ICH8/R) LPC Interface > Controller (rev 02) > 00:1f.2 IDE interface: Intel Corporation 82801H (ICH8 Family) 4 port SATA > IDE Controller (rev 02) > 00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev > 02) > 00:1f.5 IDE interface: Intel Corporation 82801H (ICH8 Family) 2 port SATA > IDE Controller (rev 02) > 03:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5754 Gigabit > Ethernet PCI Express (rev 02) > 04:02.0 VGA compatible controller: nVidia Corporation NV18 [GeForce4 MX 4000 > AGP 8x] (rev c1) > > [root@dundee ~]# rpm --query --all | grep alsa > alsa-lib-1.0.12-2.fc6 > alsa-lib-devel-1.0.12-2.fc6 > alsa-utils-1.0.12-3.fc6 > > [root@dundee Intel]# cat /proc/asound/Intel/codec#0 > Codec: Analog Devices AD1983 > Address: 0 > Vendor Id: 0x11d41983 > Subsystem Id: 0x102801da > Revision Id: 0x100400 > Default PCM: rates 0x07f, bits 0x0e, types 0x1 > Default Amp-In caps: N/A > Default Amp-Out caps: ofs=0x3d, nsteps=0x3f, stepsize=0x05, mute=1 > Node 0x02 [Audio Output] wcaps 0x30311: Stereo Digital > PCM: rates 0x060, bits 0x02, types 0x5 > Connection: 2 > 0x01* 0x04 > Node 0x03 [Audio Output] wcaps 0x441: Stereo > Power: 0x0 > Node 0x04 [Audio Input] wcaps 0x100501: Stereo > Power: 0x0 > Connection: 1 > 0x14 > Node 0x05 [Pin Complex] wcaps 0x400185: Stereo Amp-Out > Amp-Out caps: ofs=0x3d, nsteps=0x3f, stepsize=0x05, mute=1 > Amp-Out vals: [0x32 0x32] > Pincap 0x0817: OUT Detect > Pin Default 0x01014010: [Jack] Line Out at Ext Rear > Conn = 1/8, Color = Green > Pin-ctls: 0x40: OUT > Connection: 2 > 0x03 0x0e* > Node 0x06 [Pin Complex] wcaps 0x400185: Stereo Amp-Out > Amp-Out caps: ofs=0x3d, nsteps=0x3f, stepsize=0x05, mute=1 > Amp-Out vals: [0x25 0x25] > Pincap 0x081f: OUT HP Detect > Pin Default 0x0221101f: [Jack] HP Out at Ext Front > Conn = 1/8, Color = Black > Pin-ctls: 0xc0: OUT HP > Connection: 2 > 0x03 0x0e* > Node 0x07 [Pin Complex] wcaps 0x400104: Mono Amp-Out > Amp-Out caps: ofs=0x3d, nsteps=0x3f, stepsize=0x05, mute=1 > Amp-Out vals: [0x80] > Pincap 0x0810: OUT > Pin Default 0x991301f0: [Fixed] Speaker at Int ATAPI > Conn = ATAPI, Color = Unknown > Pin-ctls: 0x40: OUT > Connection: 1 > 0x0f > Node 0x08 [Pin Complex] wcaps 0x400081: Stereo > Pincap 0x081727: IN Detect > Pin Default 0x02a11020: [Jack] Mic at Ext Front > Conn = 1/8, Color = Black > Pin-ctls: 0x24: IN > Node 0x09 [Pin Complex] wcaps 0x400081: Stereo > Pincap 0x081727: IN Detect > Pin Default 0x0181302e: [Jack] Line In at Ext Rear > Conn = 1/8, Color = Blue > Pin-ctls: 0x20: IN > Node 0x0a [Pin Complex] wcaps 0x400301: Stereo Digital > Pincap 0x0810: OUT > Pin Default 0x414511f0: [N/A] SPDIF Out at Ext Rear > Conn = Optical, Color = Black > Pin-ctls: 0x40: OUT > Connection: 1 > 0x02 > Node 0x0b [Audio Selector] wcaps 0x300101: Stereo > Connection: 4 > 0x03 0x0c 0x0d 0x0e* > Node 0x0c [Audio Selector] wcaps 0x30010d: Stereo Amp-Out > Amp-Out caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0 > Amp-Out vals: [0x00 0x00] > Connection: 2 > 0x08* 0x09 > Node 0x0d [Audio Selector] wcaps 0x300101: Stereo > Connection: 2 > 0x09* 0x08 > Node 0x0e [Audio Mixer] wcaps 0x200101: Stereo > Connection: 3 > 0x11 0x12 0x13 > Node 0x0f [Audio Mixer] wcaps 0x200100: Mono > Connection: 1 > 0x0b > Node 0x10 [Beep Generator Widget] wcaps 0x70000c: Mono Amp-Out > Amp-Out caps: ofs=0x0f, nsteps=0x0f, stepsize=0x0b, mute=1 > Amp-Out vals: [0x80] > Node 0x11 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out > Amp-Out caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1 > Amp-Out vals: [0x97 0x17] > Connection: 1 > 0x03 > Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out > Amp-Out caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1 > Amp-Out vals: [0x80 0x80] > Connection: 1 > 0x0c > Node 0x13 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out > Amp-Out caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1 > Amp-Out vals: [0x9f 0x9f] > Connection: 1 > 0x0d > Node 0x14 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out > Amp-Out caps: ofs=0x00, nsteps=0x0f, stepsize=0x05, mute=1 > Amp-Out vals: [0x0f 0x0f] > Connection: 4 > 0x0c 0x0d* 0x0e 0x0f > Node 0x15 [Power Widget] wcaps 0x500500: Mono > Power: 0x0 > Connection: 15 > 0x05 0x06* 0x07 0x08 0x09 0x0b 0x0c 0x0d 0x0e 0x0f 0x10 0x11 0x12 0x13 > 0x14 > > > > > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
