Ian.Davidson
2008-07-18, 05:12 AM CDT
I have a machine running Fedora 9. It has a MSI P31 Neo Series Motherboard with Realtek ALC888 controlling the Audio onboard. Here is part of the dmesg output
ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:00:1b.0 to 64
ALSA sound/pci/hda/hda_intel.c:1810: chipset global capabilities = 0x4401
ALSA sound/pci/hda/hda_intel.c:749: codec_mask = 0x1 hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...
ALSA sound/pci/hda/hda_codec.c:2857: autoconfig: line_outs=4 (0x14/0x15/0x16/0x17/0x0)
ALSA sound/pci/hda/hda_codec.c:2861: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:2865: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:2866: mono: mono_out=0x0
ALSA sound/pci/hda/hda_codec.c:2874: inputs: mic=0x18, fmic=0x19, line=0x1a, fline=0x0, cd=0x0, aux=0x0
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Headphone Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Speaker Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Mono Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Line-Out Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Speaker Playback Switch, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Mono Playback Switch, skipped
SELinux: initialized (dev ramfs, type ramfs), uses genfs_contexts
NET: Registered protocol family 10
I have installed ALSA Mixer and audacity and tried recording. For testing purposes I plugged the headphone socket of a radio into the Line In on the audio inout and I listened through headphones on the PC output. I adjusted the Line In slider on the ALSA Mixer up and down.
The position of the Line In slider affected what I could hear in the headphones. However, the trace of what was being recorded was a thin line either side of center in audacity. By way of indication, audacity would allow me to amplify the signal by over 19 dB without clipping. If I turned up the volume on the radio, I would get distortion (from the radio), but no increase in the recording level on the PC.
Is there a way that I can record a higher signal?
TIA
ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 16 (level, low) -> IRQ 16
PCI: Setting latency timer of device 0000:00:1b.0 to 64
ALSA sound/pci/hda/hda_intel.c:1810: chipset global capabilities = 0x4401
ALSA sound/pci/hda/hda_intel.c:749: codec_mask = 0x1 hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...
ALSA sound/pci/hda/hda_codec.c:2857: autoconfig: line_outs=4 (0x14/0x15/0x16/0x17/0x0)
ALSA sound/pci/hda/hda_codec.c:2861: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:2865: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:2866: mono: mono_out=0x0
ALSA sound/pci/hda/hda_codec.c:2874: inputs: mic=0x18, fmic=0x19, line=0x1a, fline=0x0, cd=0x0, aux=0x0
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Headphone Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Speaker Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Mono Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Line-Out Playback Volume, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Speaker Playback Switch, skipped
ALSA sound/pci/hda/hda_codec.c:1073: Cannot find slave Mono Playback Switch, skipped
SELinux: initialized (dev ramfs, type ramfs), uses genfs_contexts
NET: Registered protocol family 10
I have installed ALSA Mixer and audacity and tried recording. For testing purposes I plugged the headphone socket of a radio into the Line In on the audio inout and I listened through headphones on the PC output. I adjusted the Line In slider on the ALSA Mixer up and down.
The position of the Line In slider affected what I could hear in the headphones. However, the trace of what was being recorded was a thin line either side of center in audacity. By way of indication, audacity would allow me to amplify the signal by over 19 dB without clipping. If I turned up the volume on the radio, I would get distortion (from the radio), but no increase in the recording level on the PC.
Is there a way that I can record a higher signal?
TIA