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sound interview questions

Top 15 sound interview questions


VLC player mutes when seeking

In my Ubuntu 14.10, I have VLC 2.2.0 installed. I encounter this annoying problem that VLC mutes when I seek forward or backward through a video. I have to do few seeks backward and forward again to get the sound back. This happens almost all the time when I seek using keyboard or mouse. Is this a bug of VLC? or is this something else that I can fix?

Thank you.


Source: (StackOverflow)

Autoconnecting Bluetooth Devices

Is there a way to set the Bluetooth in Ubuntu to autoconnect to devices it is paired to when it is turned on. Furthermore, is there a way to automatically change the sound output to a Bluetooth headset on connection?


Source: (StackOverflow)

Why am I getting this "Connection to PulseAudio failed" error?

I have a computer that runs Mythbuntu 12.04. It has an external USB Kenwood Digital Audio device.

When I open up pavucontrol, I get this message:

pulse error

If I do as the message suggests and run start-pulseaudio-x11, I get this output:

$ start-pulseaudio-x11
Connection failure: Connection refused
pa_context_connect() failed: Connection refused

Error log file, created with these intructions, on Pastebin.

How do I correct this error?


Source: (StackOverflow)

Skype shows "Virtual device" for Microphone, speakers and ringing

I have Ubuntu 14.04.1 and Skype 4.03.0.37. my audio devices are working fine but when I make Skype calls I can't hear the other person neither they can hear me.

when I checked Skype audio settings it showed virtual device as the only option for all devices.

I tried a lot of proposed solutions on the web and nothing helped.

what could be the problem and how can I fix it?
I know there is not a lot of details in the question to help, what extra details do I need to provide ?

Thank you so much.


Source: (StackOverflow)

How can the login greeter drums be turned off in Ubuntu 15.10?

I want to disable the startup sound effects that play when the login greeter appears after booting Ubuntu 15.10. How can this be done?


Source: (StackOverflow)

Can I downmix stereo audio to mono?

I have one speaker next to my computer which I use mostly as a headphone amplifier. On occasion I need to use it as a loudspeaker. Is it possible to quickly change the audio output from stereo to mono, either system-wide or as a plugin for a media player?


Source: (StackOverflow)

Microphone is not working in Skype

I am using Ubuntu 12.04 and Skype.

My mic is not working. I have 1 mic attached to the system and another one in my headphone (Beats by Dr. Dre).

I followed these steps:

Turn PulseAudio autospawn off, normally: $ echo "autospawn = no" > ~/.pulse/client.conf

killall pulseaudio

But this did not help me and it disabled my sound after my system restarted. I then tried

echo "autospawn = yes" > ~/.pulse/client.conf

then

pulseaudio -D

It fixed my system sound but still no sound on Skype microphone.

After that, I tried this command

echo "options snd-hda-intel model=acer" | sudo tee -a /etc/modprobe.d/alsa-base.conf > /dev/null

I've also upgraded alsa sound drivers by running:

sudo add-apt-repository ppa:ubuntu-audio-dev/ppa
sudo apt-get update
sudo apt-get install linux-alsa-driver-modules-$(uname -r)

however on the last command:

sudo apt-get install linux-alsa-driver-modules-$(uname -r)
[sudo] password for gaurav: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package linux-alsa-driver-modules-3.2.0-27-generic-pae
E: Couldn't find any package by regex 'linux-alsa-driver-modules-3.2.0-27-generic-pae'

When I type pulseaudio in terminal it shows me

E: [pulseaudio] pid.c: Daemon already running.
E: [pulseaudio] main.c: pa_pid_file_create() failed.

After all this, my sound system started behaving abnormally. Internal Speakers and headphone or 5.1 speakers both works at same time but still the microphone is not working. I even hear a noise when I don't play anything. It's freaking me out and my microphone problem is after 12.04 . Can I use my headphone microphone? I am having beats headphones.

Details of my system alsamixer

ScreenShot OF SKYPE

ScreenShot OF ubu8ntu

Even Now My system sound OUTPUT connector option is gone here is the screen shot enter image description here

enter image description here


Source: (StackOverflow)

adjust max possible volume in pulseaudio

Somtimes some sound/movie/music on my Ubuntu_12.04 system is at a very low volume by itself. Henceforth I increase the volume of the sound output. I can use the following setting (see screenshot) enter image description here

It seems therefore that pulseaudio is able to increase the volume beyond the maximum that appears possible by merely using the "increase-volume" buttons of the machine. My questions is how I can adjust Pulseaudio to allow a greater range or a higher max volume increasing???

Especially with some audio material that is at a very low volume to start with it would be nice to be able to swiftly increase the output volume (powerup) to a higher setting than maybe necessary to other -already quite loud- material.


Source: (StackOverflow)

How to play mp3 files from the command line?

I have installed Ubuntu 11.10 server.. so command line only.

I need to be able to play audio (.mp3 & .wav) files via the command line!

I've installed the MPD & Audacious packages... and copied some files to a location specified in the .conf file.

But what do I do to acutally play the .mp3 files??

Also, how can I confirm the AUDIO is working correctly?


Source: (StackOverflow)

How do you install avconv on Ubuntu Server 13.04?

I've searched and searched, but I can't find anything, besides compiling it, which gives me an error about ASM.


Source: (StackOverflow)

Automatically adjust the volume based on content?

In different audio sources the level of sounds are different. It's very annoying to set the level of sound on almost every media content. Sometimes, when before you had something quiet, you had to adjust it more louder and after some time you want to play another media - bang! it unexpectedly breaks your headphones, the sound is so loud!

So, is there some plugin/feature which can automatically adjust the level of sound on every media content?


Source: (StackOverflow)

How can I tell if I'm using alsa or pulse-audio by default? (Switching to i3-wm)

I might not be understanding the core concept, in which case correct me if I'm wrong. Ubuntu comes with two different audio rendering servers, pulse and alsa. Alsa is an intermediary layer to pulse? I'm not 100% sure

Essentially I need to know which one I'm using.

The reason why I need to know? I'm attempting to switch from unity to i3-wm. While setting up i3 I found I had no audio and came upon this thread. It specifies various options for binding my laptop volume up and down keys to their functionality and after I tinkered with a few of the options I got very scratchy audio, which is why (I assume) I need to know which I'm actually using.

Thanks for any help in advance, it's much appreciated.


Source: (StackOverflow)

"Limbo" game has no sound

I just bought a game called Limbo in Humble Bundle V. The site says that all games are cross-platform but in my computer the game has no sound. I've searched in google and looked in the official FAQ, but none of them helped me.

How can I fix this?


Source: (StackOverflow)

Are there still plans for a new sound theme?

Let me quote from Mark's blog almost one year ago:

March 5th, 2010 at 7:19 pm
Mark, will there be an update to the sound theme to match the updated visual brand?

Mark Shuttleworth: Gack, I completely forgot about that. A very good point. Would you see if you can rally a round of community submissions for a sound theme inspired by light?

Let's keep it short and sweet: What are the current considerations for the Ubuntu default sound theme?


Update, October 5 2011

This question was "answered" before the release of Natty. However, it proved to be wrong in the mean time. So the legacy continues, and I am reopening this one.


Update, February 15, 2012

Something is rolling! Looks like there will be a new sound for 12.04. Only a start-up sound however, no complete theme.

http://design.canonical.com/2012/02/sound-theme-update/


Update, April 30, 2012

It seemed to look good, but for some reason the sound did not make it into 12.04. There have been no announcements as to why, however. The sound theme remains a mistery...


Update, May 2, 2012

Mark Shuttleworth made a statement on IRC recently saying that it simply "was not perfect yet." It will maybe be in 12.10 then.


Update, December 6, 2012

Not in 12.10, either. But - there's still hope for 13.04!


As of the last update, the bug report for getting a new sound theme has been marked as Confirmed (but not In Progress) with the last comment posted October 31, 2011.


Update, September 11, 2013

Won't be in 13.04, and neither in 13.10. However, an interesting proposal has popped up. The composer of the "Mass Effect" soundtrack offered to make a startup sound for Ubuntu on this mailing list.

http://www.omgubuntu.co.uk/2013/09/mass-effect-composer-ubuntu-14-04-start-up-sounds

Discussion on Reddit here.


Source: (StackOverflow)

How do I toggle sound with amixer?

Including Natty I was always able to toggle (mute/unmute) the 'Master' sound volume with the

amixer sset Master toggle

command that I linked to an edge binding in CompizConfig-Manager.

Now after installing Oneiric the command only mutes the sound but doesn't unmute it. I even tried it in the Terminal but it also doesn't work. It changes 'Mono: Playback 68 [78%] [-14.25dB] [off]' to '...[on]' but the sound stays muted so that I have to unmute it via the 'sound-indicator' in the panel.

How can I get this working again? What did change since Natty? Does anyone know the command the 'sound-indicator' uses to toggle the sound volume?


Source: (StackOverflow)