263
votes
Accepted
ffmpeg - replace audio in video
You will want to copy the video stream without re-encoding to save a lot of time but re-encoding the audio might help to prevent incompatibilities:
ffmpeg -i v.mp4 -i a.wav -c:v copy -map 0:v:0 -map 1:...
216
votes
Accepted
Can I write (200 MB - 150 min) music to a (700 MB - 80 min) CD?
You can write 200MB to the 700MB disk if the disk remains a data disk.
If you want the CD to play in home audio systems/stereos then the MP3 files will be decoded to raw PCM (like a WAV file) during ...
145
votes
Restart Ubuntu sound processes via command line
As suggested by mikewhatever
in his answer to this question on Ask Ubuntu:
pulseaudio -k && sudo alsa force-reload
103
votes
Properly downmix 5.1 to stereo using ffmpeg
The answers on this question have since become a bit of a mess, with many containing redundant information and others complete inaccuracies. This answer is an attempt to streamline the information in ...
96
votes
How do I check if a 2-track WAV file is "really" in stereo?
This answer has now been expanded to cover three different way of achieving this, from the simplest; no code required, just listen, to more complex examples that could be used for bulk testing.
...
Community wiki
95
votes
What's the difference between stereo and hands free?
The "Stereo" device is technically known in Bluetooth jargon as "Advanced Audio Distribution Profile", or with an acronym A2DP. It is optimized for transferring 2-channel stereo sound with good ...
70
votes
Windows 10, manually reconnect to already paired Bluetooth device?
I think I have finally found a reliable answer for this.
Win+A brings up the action center
If you dont see "connect" you may need to click expand
Click Connect and then you can force connect your ...
59
votes
Accepted
How can I switch an application to a different playback device on Windows 10
Found a free (GPL) alternate and thought I would throw it out there for anyone else stumbling in from google... before anyone throws away $20 to CheVolume or installs their adware-containing trial ...
58
votes
Accepted
Is it possible to have two sources of audio output to different speakers in Windows 10?
I found two applications that allows you to do this.
CheVolume (Paid) - 7 day trial version available
Audio Router (Free) - open source alternative to CheVolume
Note: If not working you need to ...
56
votes
Can I losslessly increase the volume of an MP3 file?
Yes. You can do this. The technique is used by a number of programs and the levels are calculated by an algorithm called ReplayGain. Mp3 volume level data can be adjusted losslessly, just as a JPEG ...
55
votes
Accepted
Can a computer analyze audio quicker than real time playback?
Yes. Absolutely.
Algorithms can process data as fast as they can read them and get them through the CPU.
If data is on disk, for example, a modern NVMe can read at 5+ GB/s which is much faster than ...
55
votes
How can earbuds+mic use a single audio jack?
Standard mono phone plugs have two separate electrical connections along the barrel, one at the end called the tip, for the audio signal, separated by a plastic ring from a second one called the ...
51
votes
Switching default audio device with a batch file
I appreciate you don't wish to use any third party software, but as an option for if you don't mind using a ~100kb exe, you can use Nircmd with the commands:
nircmd setdefaultsounddevice "Speakers" 1
...
48
votes
How to enable remote microphone on remote desktop
Before connecting to the remote computer, click on Show Options > Go to Local Resources tab > click Settings in the audio configuration. You can enable the recording from your local PC to the remote ...
48
votes
Accepted
Earbuds vs. on-ear vs. over-ear headset in Windows 10
I have a Dell laptop with an audio controller tool MaxxAudioPro, and these pictures are what it shows on plugging in the headphones.
(Earbuds)
(On-ear)
(Over-ear)
Depending on how the tool ...
45
votes
Accepted
Google Chrome adjust volume per tab
Sounds like Volume Master (Chrome extension) does exactly what you want: https://chrome.google.com/webstore/detail/volume-master/jghecgabfgfdldnmbfkhmffcabddioke
I am the author of this product.
45
votes
What's the difference between stereo and hands free?
I've experimented with my own bluetooth headset and here's my results:
the "Stereo" device is the main high-quality playback device of the headset, while the "hands-free" device is a lower quality ...
44
votes
Accepted
Is it possible to speed up video with audio using ffmpeg, without changing audio pitch?
It can be done with ffmpgeg using a complex filter:
ffmpeg -i input.mkv -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mkv
...
43
votes
Accepted
Disabling Realtek audio notification on Windows 10
Go to Settings > System > Notifications and actions and under Get notifications from these senders, scroll down and turn off Realtek HD Audio Manager
42
votes
Can I write (200 MB - 150 min) music to a (700 MB - 80 min) CD?
700 MB is calculated to 80 minute in CDDA (Compact Disc Digital Audio) format. What you asked is a little bit ambiguous so, here's a break down of what you may have asked:
You can burn 80 minutes of ...
41
votes
Add .mp3 to the end of file names
I often use a command in Command Prompt in Windows, it's REN. The purpose is to rename a file or more.
ren oldfile.png newfile.png
But in this case, you need to rename multiple files, then we can ...
40
votes
Accepted
I can't tag my AAC files with meta-data; what can I do instead?
.aac files are just a "raw" audio stream, they do not support MP3-style tag embedding because AAC is meant to be used with a separate "wrapper" container format to carry those tags ...
39
votes
Cleaning computer cables In the dishwasher
People do all kinds of things that aren't a good idea. If you read the answers on your linked question, you'll see that some people managed to get away with it and some didn't.
Dishwasher Use
...
38
votes
How do I swap audio output of the left and right speakers?
There is a software solution called Equalizer APO
configure it to attach to your output device (Usually something like: "Speakers - VIA HD Audio" or "Speakers - Realtek HD Audio")
create a new file ...
38
votes
Accepted
What happens if a scratched CD is ripped to MP3?
Good CD ripper software like cdparanoia try their best to correct bad readings of a CD and will go over the affected part multiple times; sometimes for several minutes until the data is recovered. ...
37
votes
Restart Ubuntu sound processes via command line
PulseAudio is a user service, so run systemctl with the --user flag.
systemctl --user restart pulseaudio
37
votes
Accepted
Disabling UAC on a work computer, at least the audio notifications
Your IT dept may take a dim view of changing when UAC is triggered.
To turn the sound off try
StartMenu -> Search -> Change system sounds. Then in Program Events change the sound for Windows ...
Only top scored, non community-wiki answers of a minimum length are eligible
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