At Sun, 20 Sep 2009 20:50:38 +0200, Matthias Bläsing wrote: > > Hello, > > it would be nice if I could control the input channels of my lenovo > laptop (Lenovo R500). These are configured for microphone input, but the > amplifier can be deactivated, so that it can work with the higher > line-in level. > > The resulting quality is not good, but at least usable. > > The volume control is joint, but the amplifier control are seperated. > With the HDAAnalyser I could find the Nodes (0x17 (rear) and 0x18 > (front)) can be used to control the amplification. The setting can be > changed between 0 and 4, where 0 makes it possible to use the input for > line-in, while 4 is better suited for microphone input. > > I'm not sure whether it would be better to expose this as a stepped > control or just a switch (amplifier on/off). > > These are the loaded modules (from kernel 2.6.31): > > snd_usb_audio 74152 3 > snd_usb_lib 13904 1 snd_usb_audio > snd_hda_codec_conexant 17684 1 > snd_seq_dummy 2748 0 > snd_seq_oss 24620 0 > snd_hda_intel 24064 9 > snd_hda_codec 65724 2 snd_hda_codec_conexant,snd_hda_intel > snd_seq_midi 6232 0 > snd_hwdep 6772 3 snd_usb_audio,snd_hda_codec > snd_rawmidi 19600 2 snd_usb_lib,snd_seq_midi > snd_seq_midi_event 6580 2 snd_seq_oss,snd_seq_midi > snd_pcm_oss 33516 0 > snd_mixer_oss 13416 1 snd_pcm_oss > snd_seq 44744 7 > snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event > snd_pcm 64872 6 > snd_usb_audio,snd_hda_intel,snd_hda_codec,snd_pcm_oss > snd_timer 18448 2 snd_seq,snd_pcm > snd_seq_device 6424 5 > snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq > snd_page_alloc 8556 2 snd_hda_intel,snd_pcm > snd 52452 35 > snd_usb_audio,snd_hda_codec_conexant,snd_seq_oss,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_rawmidi,snd_pcm_oss,snd_mixer_oss,snd_seq,snd_pcm,snd_timer,snd_seq_device > soundcore 6876 1 snd > > I attached the /proc/asound/card0/codec#0 info to this email. If you > need further information - please ask. Could you give alsa-info.sh output (run with --no-upload option)? This would be more comprehensive information. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
