PulseAudio is a software mixer, on top of the userland (like you'd run an app). When it runs, it uses Alsa - without dmix - and manages every kind of mixing, the devices, network devices, everything by itself. In 2014, you can still run only ALSA.
Finally, install the equalizer.
- sudo apt-get install pulseaudio-equalizer.
- This equalizer program is straightforward and easy to use.
- From here, just go to the pre-set drop-down menu, scroll through the list and select the equalizer pre-set that you feel sounds the best with your computer's sound system, etc.
Ubuntu uses both ALSA, and Pulseaudio for controlling sound input and output.
PulseAudio will first look for configuration files in the home directory ~/. config/pulse , and if they are not found, the system-wide configuration from /etc/pulse will be applied.
Open the system menu and make sure that the
sound is not muted or turned down.
Also, you can check the Applications tab in the Sound GUI:
- Open the Activities overview and start typing Sound.
- Click on Sound to open the panel.
- Under Volume Levels, check that your application is not muted.
How to Resolve no sound problem on Ubuntu 14.04, 13.10, 13.04 and Older versions
- Check the volume. First thing you need to check is the volume settings, Go to top menu and click sound settings (see screenshot bellow):
- Check Alsa Mixer.
- Reinstall Alsa and Pulse Audio.
- Install Ubuntu Audio Development Team Driver.
How to Properly Replace Pulseaudio with ALSA on Crunchbang Linux and Debian Squeeze
- Remove all pulseaudio packages:
- Get rid of the /etc/asound.conf file. I have renamed it, in case I want to install Pulseaudio once again and reuse it:
- Delete the pulseaudio directories from the user's home:
- Install ALSA:
To do so, connect a set of RCA cables to the head unit's preamp outputs. Tape the RCA cables together to prevent them from separating. Run the RCA cables through the dash to the equalizer and connect them to the EQ inputs. Use additional RCA cables to connect the EQ to the amplifier (one set of RCA cables per amp).
How to enable the sound on Kali Linux
- Stop any sound service. The killall command is used to kill all processes (running instances of programs) associated with programs whose names are provided to it as arguments.
- Remove pulseaudio.
- Install alsa-base.
- Install kmix.
- Install pulseaudio.
- Install gnome-core.
To apply the fix follow these steps:
- Install PulseAudio by running sudo apt-get install pulseaudio.
- Configure mpd to use PulseAudio as output plugin by editing /etc/mpd. conf . You need to remove or comment out the lines that refer to the Alsa output plugin and add these lines instead:
PulseAudio Volume Control should be installed. Now you can open PulseAudio Volume Control from the Application Menu of your Ubuntu 18.04 LTS. This is the PulseAudio Volume Control graphical utility. You can configure the sound output from the Output Devices tab.
Alsamixer
- Open a terminal. (The quickest way is the Ctrl-Alt-T shortcut.)
- Enter "alsamixer" and press the Enter key.
- You will now see a user interface. In this user interface, you can do the following: Select your correct sound card using F6 and select F5 to see recording controls as well.
ALSA is the kernel level sound mixer, it manages your sound card directly. (It's an ALSA module.) PulseAudio is a software mixer, on top of the userland (like you'd run an app). When it runs, it uses Alsa - without dmix - and manages every kind of mixing, the devices, network devices, everything by itself.
The Advanced Linux Sound Architecture (ALSA) provides kernel driven sound card drivers. It replaces the original Open Sound System (OSS). Besides the sound device drivers, ALSA also bundles a user space driven library for application developers. They can then use those ALSA drivers for high level API development.
Go to 'Master' then press M and then keep hitting the up key to bring the sound levels up. I do that for any other inputs I want like pcm etc. with the number being how many channels you want to test. You should hear static from each channel in turn.
Here's how to do it in Ubuntu 15.10:
- Launch Terminal.
- Run pulseaudio -k to kill the running daemon. You will get an error only if no daemon was running, otherwise no messages will appear.
- Ubuntu will attempt to restart the daemon automatically assuming there are no problems with the configuration.
Use "aplay -l" to get a list of the devices on your system. The hw:X,Y comes from this mapping of your hardware -- in this case, X is the card number, while Y is the device number. Since these are USB devices that might not always get the same device numbers each time they're plugged in, the hw:X,Y device might change.
