On Mon, Jun 8, 2015, at 09:37 PM, MusicFan wrote: > Hi, > > I am aware that my systems are not Ubuntu studio systems, nonetheless, I > am hoping that you might have some suggestions on what steps to take in > order to identify the root cause for the difference in background noise. > > The problem is the following: recording voice with Audacity using a USB > headset (Logitech PC Headset 960 USB). > Recording the voice with an older kernel generates very little background > noise (which is easy to remove with Audacity). The noise is hardly > noticeable. > Recording the voice with a newer kernel generates a lot of background > noise (removing it with Audacity removes part of the voice as well). > > The hardware is same, as well as the recording environment. > Older Linux is: > System: Kernel 3.2.0-84-generic x86_64 (64 bit gcc 4.6.3) Desktop Gnome > (Gtk 3.4.2) dm mdm > Distro Linux Mint 13 Maya > Audio: Card-1 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA) > driver snd_hda_intel bus-ID 00:14.2 chip-ID 1002:4383 > Card-2 Advanced Micro Devices [AMD/ATI] Wrestler HDMI Audio > driver snd_hda_intel bus-ID 00:01.1 chip-ID 1002:1314 > Card-3 Logitech driver USB Audio usb-ID 001-005 chip-ID 046d:0826 > Card-4 Logitech driver USB Audio usb-ID 001-006 chip-ID 046d:0a45 > Sound Advanced Linux Sound Architecture v 1.0.24 > > Newer Linux is: > System: Kernel 3.13.0-24-generic x86_64 (64 bit gcc 4.8.2) > Desktop Cinnamon 2.4.1 (Gtk 3.10.8~8+qiana) dm mdm Distro Linux > Mint 17 Qiana > Audio: Card-1 Advanced Micro Devices [AMD/ATI] Wrestler HDMI Audio > driver snd_hda_intel bus-ID 00:01.1 chip-ID 1002:1314 > Card-2 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA) > driver snd_hda_intel bus-ID 00:14.2 chip-ID 1002:4383 > Card-3 Logitech driver USB Audio usb-ID 001-005 chip-ID 046d:0826 > Card-4 Logitech driver USB Audio usb-ID 001-006 chip-ID 046d:0a45 > Sound Advanced Linux Sound Architecture v k3.13.0-24-generic > > > On the newer system, I've lowered all sliders using the alsamixer, but no > improvement. > > Any suggestions are much appreciated. > > Thank you.
My first bet would be that there was some sort of difference in your setup, and that this was caused by hardware only. But, there is also a chance something changed in ALSA. I cannot give any other advice than to google on a combination of your hardware, linux, alsa and perhaps words like noise, bug, etc. /Kaj -- ubuntu-studio-users mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
