Questions tagged [audio]

Sound and programming audio hardware, and the various audio formats or containers. For questions specific to sounds playback, use [audio-player] or [playback], and for questions specific to sounds recording, use [audio-recording] or [voice-recording].

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337 votes
18 answers
338k views

How do I make JavaScript beep?

I want my web page to beep whenever a user exceeds the maximum character limit of my <textarea>.
Slim's user avatar
  • 5,855
334 votes
15 answers
467k views

Convert audio files to mp3 using ffmpeg [closed]

I need to convert audio files to mp3 using ffmpeg. When I write the command as ffmpeg -i audio.ogg -acodec mp3 newfile.mp3, I get the error: FFmpeg version 0.5.2, Copyright (c) 2000-2009 Fabrice ...
Hrishikesh Choudhari's user avatar
262 votes
10 answers
258k views

How to add a new audio (not mixing) into a video using ffmpeg?

I used a command like: ffmpeg -i video.avi -i audio.mp3 -vcodec codec -acodec codec output_video.avi -newaudio in latest version for adding new audio track to video (not mix). But I updated the ...
Vetalll's user avatar
  • 3,604
260 votes
1 answer
169k views

What are the differences and similarities between ffmpeg, libav, and avconv?

When I run ffmpeg on Ubuntu, it shows: $ ffmpeg ffmpeg version v0.8, Copyright (c) 2000-2011 the Libav developers built on Feb 28 2012 13:27:36 with gcc 4.6.1 This program is not developed anymore ...
why's user avatar
  • 24.4k
226 votes
13 answers
193k views

Sound alarm when code finishes

I am in a situation where my code takes extremely long to run and I don't want to be staring at it all the time but want to know when it is done. How can I make the (Python) code sort of sound an "...
mtigger's user avatar
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194 votes
12 answers
402k views

How can I play sound in Java?

I want to be able to play sound files in my program. Where should I look?
pek's user avatar
  • 18k
191 votes
11 answers
265k views

How to play an android notification sound

I was wondering how I could play a notification sound without playing it over the media stream. Right now I can do this via the media player, however I don't want it to play as a media file, I want ...
ninjasense's user avatar
  • 13.8k
187 votes
14 answers
228k views

HTML5 check if audio is playing?

What's the javascript api for checking if an html5 audio element is currently playing?
Harry's user avatar
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175 votes
13 answers
331k views

Is it possible to style html5 audio tag?

I haven't found any resources on how to do that. Something as simple as changing the color of the player would be nice to have :)
rabidmachine9's user avatar
171 votes
13 answers
332k views

Python: Making a beep noise

I'm trying to get the program to give me a beeping noise. I'm on a windows machine. I've looked at http://docs.python.org/library/winsound.html But not sure how I can program this with a barcode ...
Marc Brigham's user avatar
  • 2,204
161 votes
18 answers
94k views

Stop the 'Ding' when pressing Enter

I have a very simple Windows Forms Application. And, in Windows (or, atleast Windows Forms Applications), when you press Enter while inside a Single-line TextBox Control, you hear a Ding. It's an ...
bendr's user avatar
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155 votes
7 answers
322k views

How to play a sound in C#, .NET

I have a Windows application written in C#/.NET. How can I play a specific sound when a button is clicked?
Khilen Maniyar's user avatar
154 votes
30 answers
248k views

How to prevent "The play() request was interrupted by a call to pause()" error?

I made a website where if the user clicks, it plays a sound. To prevent the sound from overlapping, I had to add the code: n.pause(); n.currentTime = 0; n.play(); But that causes the error: The ...
Owen M's user avatar
  • 2,655
151 votes
25 answers
298k views

Play audio with Python

How can I play audio (it would be like a 1 second sound) from a Python script? It would be best if it was platform independent, but firstly it needs to work on a Mac. I know I could just execute the ...
Josh Hunt's user avatar
  • 14.4k
149 votes
14 answers
158k views

How do I record audio on iPhone with AVAudioRecorder?

Now that iPhone 3.0 SDK is public, I think I can ask this question for those of you that have already been playing with the 3.0 SDK. I want to record audio in my application, but I want to use ...
Jim Zimmerman's user avatar
144 votes
11 answers
209k views

How to play a notification sound on websites?

When a certain event occurs, I want my website to play a short notification sound to the user. The sound should not auto-start (instantly) when the website is opened. Instead, it should be played on ...
Timo Ernst's user avatar
  • 15.6k
143 votes
6 answers
121k views

Play audio file from the assets directory

I have the following code: AssetFileDescriptor afd = getAssets().openFd("AudioFile.mp3"); player = new MediaPlayer(); player.setDataSource(afd.getFileDescriptor()); player.prepare(); player.start(...
Catalin Morosan's user avatar
143 votes
4 answers
206k views

Node.js can't create Blobs? [duplicate]

I am working with node.js and I streamed my Audio to my node.js server. Now I noticed during the process of building the audio blob: var audioBlob = new Blob([dataview], { type: 'audio/wav' }); That ...
zer02's user avatar
  • 4,001
125 votes
14 answers
356k views

Reading *.wav files in Python

I need to analyze sound written in a .wav file. For that I need to transform this file into set of numbers (arrays, for example). I think I need to use the wave package. However, I do not know how ...
Roman's user avatar
  • 128k
124 votes
6 answers
149k views

How can I make the computer beep in C#?

How do I make the computer's internal speaker beep in C# without external speakers?
a_hardin's user avatar
  • 5,132
123 votes
15 answers
447k views

Playing .mp3 and .wav in Java?

How can I play an .mp3 and a .wav file in my Java application? I am using Swing. I tried looking on the internet, for something like this example: public void playSound() { try { ...
Stan's user avatar
  • 3,669
121 votes
5 answers
123k views

How are VST Plugins made?

I would like to make (or learn how to make) VST plugins. Is there a special SDK for this? how does one yield a .vst instead of a .exe? Also, if one is looking to make Audio Units for Logic Pro, how is ...
jmasterx's user avatar
  • 53.4k
118 votes
10 answers
486k views

Play a Sound with Python [duplicate]

What's the easiest way to play a sound file (.wav) in Python? By easiest I mean both most platform independent and requiring the least dependencies. pygame is certainly an option, but it seems ...
Claudiu's user avatar
  • 227k
113 votes
3 answers
103k views

FFMPEG mux video and audio (from another video) - mapping issue

I would like to place the audio from a video to another video without an audio (in one command): ffmpeg.exe -i video1_noAudio.mov -i video2_wAudio.mov -vcodec copy -acodec copy video1_audioFromVideo2....
Mark's user avatar
  • 1,600
111 votes
4 answers
64k views

Analyze audio using Fast Fourier Transform

I am trying to create a graphical spectrum analyzer in python. I am currently reading 1024 bytes of a 16 bit dual channel 44,100 Hz sample rate audio stream and averaging the amplitude of the 2 ...
user19745's user avatar
  • 3,579
105 votes
24 answers
123k views

Creating and playing a sound in swift

So what I want to do is create and play a sound in swift that will play when I press a button, I know how to do it in Objective-C, but does anyone know how to in Swift? It would be like this for ...
Jacob Banks's user avatar
  • 1,217
104 votes
10 answers
175k views

Play audio from a stream using C#

Is there a way in C# to play audio (for example, MP3) direcly from a System.IO.Stream that for instance was returend from a WebRequest without saving the data temporarily to the disk? Solution with ...
Martin's user avatar
  • 10.8k
102 votes
10 answers
99k views

Playing an arbitrary tone with Android

Is there any way to make Android emit a sound of arbitrary frequency (meaning, I don't want to have pre-recorded sound files)? I've looked around and ToneGenerator was the only thing I was able to ...
Jeremy Logan's user avatar
  • 47.3k
99 votes
4 answers
54k views

Understanding FFT output

I need some help understanding the output of the DFT/FFT computation. I'm an experienced software engineer and need to interpret some smartphone accelerometer readings, such as finding the principal ...
stackoverflowuser2010's user avatar
98 votes
8 answers
94k views

Why does FFT produce complex numbers instead of real numbers?

All the FFT implementations we have come across result in complex values (with real and imaginary parts), even if the input to the algorithm was a discrete set of real numbers (integers). Is it not ...
steve landiss's user avatar
98 votes
7 answers
90k views

How to overlay/downmix two audio files using ffmpeg

Can I overlay/downmix two audio mp3 files into one mp3 output file using ffmpeg?
Faisal's user avatar
  • 1,337
92 votes
16 answers
209k views

Autoplay audio files on an iPad with HTML5

I'm trying to get an audio file to autoplay in Safari on an iPad. If I go to the page using Safari on my Mac, it's fine. On the iPad, autoplay does not work.
milesmeow's user avatar
  • 3,757
92 votes
6 answers
104k views

Using ffmpeg to cut audio from/to position

I need to cut parts from an audio file from position to position. When I tried this command ffmpeg -ss 132 -t 139 -i original.mp3 new.mp3 it started at the second 132, and added the next 139 ...
Mike's user avatar
  • 2,181
90 votes
10 answers
197k views

Playing sound notifications using Javascript?

How can I do that, so whenever a user clicks a link we play a sound? Using javascript and jquery here.
Ali's user avatar
  • 265k
89 votes
6 answers
81k views

java.io.IOException: mark/reset not supported

try { //String location = dir1.getCanonicalPath()+"\\app_yamb_test1\\mySound.au"; //displayMessage(location); AudioInputStream audio2 = AudioSystem.getAudioInputStream(getClass()....
Crais's user avatar
  • 903
88 votes
17 answers
383k views

Playing mp3 song on python

I want to play my song (mp3) from python, can you give me a simplest command to do that? This is not correct: import wave w = wave.open("e:/LOCAL/Betrayer/Metalik Klinik1-Anak Sekolah.mp3","r")
The Mr. Totardo's user avatar
83 votes
8 answers
137k views

How to generate audio from a numpy array?

I want to create "heart rate monitor" effect from a 2D array in numpy and want the tone to reflect the values in the array.
gisgyaan's user avatar
  • 845
80 votes
8 answers
57k views

Generating sound on the fly with javascript/html5

Is it possible to generate a constant sound stream with javascript/html5? For example, to generate a perpetual sine wave, I would have a callback function, that would be called whenever the output ...
Johannes Hoff's user avatar
80 votes
10 answers
93k views

How to detect the BPM of a song in php [closed]

How can the tempo/BPM of a song be determined programmatically? What algorithms are commonly used, and what considerations must be made?
user avatar
80 votes
10 answers
61k views

Cross-platform, cross-browser way to play sound from Javascript? [duplicate]

I am writing a dhtml application that creates an interactive simulation of a system. The data for the simulation is generated from another tool, and there is already a very large amount of legacy ...
Jake Stevenson's user avatar
79 votes
3 answers
24k views

How bad is Android SoundPool? What alternative to use?

I was looking at Android's SoundPool as a mechanism to implement sound effects in my generic game development library. It seemed ideal. But a little bit of research indicates that there all kinds of ...
Andrew Russell's user avatar
77 votes
5 answers
142k views

Download only audio from youtube video using youtube-dl in python script

There's a few posts on downloading audio from YouTube using youtube-dl, but none of them are concrete or too helpful. I'm wondering what the best way to do it from a Python script is. For example, ...
lollercoaster's user avatar
75 votes
7 answers
101k views

Get URI of .mp3 file stored in res/raw folder in android

I have many .mp3 files stored in res/raw folder. I am getting URI of .mp3 file using following code. Uri.parse("android.resource:///com.my.android.sharesound/"+resId); This returns : android....
Kartik Domadiya's user avatar
75 votes
12 answers
142k views

Get .wav file length or duration

I'm looking for a way to find out the duration of a audio file (.wav) in python. So far i had a look at python wave library, mutagen, pymedia, pymad i was not able to get the duration of the wav file. ...
Pannu's user avatar
  • 2,617
75 votes
7 answers
87k views

Python Sound ("Bell")

I'd like to have a python program alert me when it has completed its task by making a beep noise. Currently, I use import os and then use a command line speech program to say "Process complete&...
stalepretzel's user avatar
  • 15.8k
74 votes
4 answers
56k views

How to play audio in background with Swift?

As you see I'm streaming an audio broadcast. But when I press the home button and exit the app streaming stops or I cannot hear. How can I continue streaming in background and listen it from lock ...
do it better's user avatar
  • 4,737
73 votes
10 answers
186k views

Download the best quality audio file with youtube-dl [closed]

I have just download youtube-dl so I can download video and audio files from youtube. I want to download the best audio from the following video: https://www.youtube.com/watch?v=uWusmdmc0to When I ...
WJ496582's user avatar
  • 971
73 votes
3 answers
57k views

Using the Apple FFT and Accelerate Framework

Has anybody used the Apple FFT for an iPhone app yet or know where I might find a sample application as to how to use it? I know that Apple has some sample code posted, but I'm not really sure how to ...
Ian Oswald's user avatar
  • 1,365
73 votes
10 answers
111k views

Why can't JavaScript .play() audio files on iPhone safari?

I've got a JavaScript web app working that plays some audio periodically like this: var SOUND_SUCCESS = new Audio('success.mp3'); SOUND_SUCCESS.play(); This works great on desktop browsers (tested in ...
Leon Overweel's user avatar
73 votes
8 answers
105k views

Playing a sound with AVAudioPlayer

I'm trying to play a sound with AVAudioPlayer but it won't work. Edit 1: Still doesn't work. Edit 2: This code works. My device was in silent mode. import UIKit import AVFoundation class ...
user3722523's user avatar
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