On Wed, 2010-03-03 at 22:32 -0600, Rick Sewill wrote: > I have found audio, in general, and pulseaudio, in particular, tricky. > > I try to divide audio into parts, alsa is one part, pulseaudio another. > > I believe many software programs use alsa. > I believe alsa, in turn, uses pulseaudio. > > I must add a caveat. I believe programs can be configured to use alsa. > I believe some programs can be configured to use pulseaudio, bypassing > alsa. I believe some programs can be configured to bypass pulseaudio, > and go straight to the hardware device drivers. > > Assuming your configuration uses alsa, which in turn goes to pulseaudio, > I believe you have to look at both alsa and pulseaudio. > > For alsa, do you have alsa-utils installed? > For me, it is rpm -q -i alsa-utils: > rsewill@rsewill:~ <2:18> $ rpm -q -i alsa-utils > Name : alsa-utils Relocations: (not > relocatable) > Version : 1.0.22 Vendor: Fedora Project > Release : 1.fc12 Build Date: Sat 02 Jan 2010 > 03:26:02 > .... > > If you this installed, there is a program, amixer, please type > amixer > > When I type amixer, I get the following: > rsewill@rsewill:~ <2:16> $ amixer > Simple mixer control 'Master',0 > Capabilities: pvolume pswitch pswitch-joined penum > Playback channels: Front Left - Front Right > Limits: Playback 0 - 65536 > Mono: > Front Left: Playback 15601 [24%] [on] > Front Right: Playback 15601 [24%] [on] > Simple mixer control 'Capture',0 > Capabilities: cvolume cswitch cswitch-joined penum > Capture channels: Front Left - Front Right > Limits: Capture 0 - 65536 > Front Left: Capture 32845 [50%] [on] > Front Right: Capture 32845 [50%] [on] > "Master" seems to control output volume for me. > "Capture" seems to control input from my microphone. > > For audio output, > I want "Front Left" and "Front Right" of "Master" > to have a certain volume level, in my case 24%, and be on. > I actually control volume by adjusting the volume of "Master". > I leave pulseaudio alone once I have it set the way I want it. > > For my microphone, I control the volume using "Capture". > I leave pulseaudio alone once I have it set the way I want it. > > I believe this is only part of the picture. > Alsa, in turn goes to pulseaudio. > > There is a pulseaudio volume control applet. > Do you have pavucontrol installed? > It is found in the rpm pavucontrol, for me > rpm -q -i pavucontrol yields > rsewill@rsewill:~ <2:21> $ rpm -q -i pavucontrol > Name : pavucontrol Relocations: (not > relocatable) > Version : 0.9.10 Vendor: Fedora Project > Release : 1.fc12 Build Date: Wed 14 Oct 2009 > 03:11:07 PM CDT > .... > > When I run this applet, either from the command line, as pavucontrol, > or from the menu--it is found as > Applications->Sounds and Video-->Pulse Audio Volume Control > > an applet pops up, with 5 tabs, > "Playback","Recording","Output Devices","Input Devices","Configuration" > Please look at the "Output Devices" tab, > show "All Output Devices", > Please make sure the device is not muted--if the device is muted > the "Front Left" and "Front Right" lines will be greyed out on a device. > Please adjust the volume of this device, as appropriate. > For me, I have the volume of my device adjusted to 24% for both > "Front Left" and "Front Right". > > I have not found man pages for pavucontrol or amixer. > I can make educated guesses what the tabs for pavucontrol mean, > but I would be guessing. > > You will have different hardware. > You may get different devices to examine. > Hope you can adapt what I see on my system to what you have. > I need to make one correction, showing that I do not understand audio even yet. I just learned, when I change the sound, using alsa controls, alsa changes the volume on the pulseaudio controls shown by pavucontrol. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
