mp3

问题 I want to be able to play an alarm sound using Javascript in a browser window, preferably with the requirement for any browser plugins (Quicktime/Flash). I have been experimenting with the tag and the new Audio object in Javascript, but results are mixed: As you can see, there is no variant that works on all browsers. Do I miss a trick that is more cross-browser compatible? This is my code: // mp3 with Audio object var snd = new Audio("/sounds/beep.mp3");snd.play(); // wav with Audio object

问题 I have a list of .mp3 files over the web and I would like to get the highest quality file. Quality in multimedia files equals the bit rate of them. The bit rate itself should be found in the file's headers. If not, length of the audio track could be used too. (Filesize / Track Length = Bit Rate) These things would be easy if I would have these files locally, but I would like to fetch this information over HTTP and determine which file has the highest quality. Can I get an audio track's length

问题 in my app i need to decode an mp3 file into a pcm buffer. that's a lot of data so i downsample it to mono 22050Hz as i read and decode it. at the moment i'm using javazoom jlayer decoder http://www.javazoom.net/javalayer/javalayer.html its working but its slow, 30secs to decode a 3min song in run mode, ages in debug mode. on my windows machine using libmpg i can do that in about 1 second. is there a faster way that anyone knows for sure is faster? i don't want to waste time implementing

问题 I'm writing a PHP page that generates a podcast feed by scraping an existing HTML page. Everything works great, but one of my mp3 files gives a "filesize(): stat failed" error. As best as I can tell, the file isn't corrupted, and it plays perfectly fine. I've also reuploaded the file to the server. It falls in the middle range of all the file sizes, so I don't think the file is too large. Because every other file returns a file size, I'm assuming the problem is with the mp3 file, not with my

问题 I have been searching the internet with no success for a tool that will allow two mp3 files to be overlaid on top of each other. I have a client who wants to build a service that allows someone to select a music track and a vocal track from a list of files and then have them play together. Her business produces visualisation CD's and I believe this would be the best route as she has hundreds of visualisation mp3 scripts and about 30 backing music. This will allow the merging of these 2 files

问题 I'm wondering if it's possible to record an audio file in mp3 format programmatically with Xcode. I've read a tons of documentations and I've googled for this, but no result. Please help, if someone knows how this is possible? 回答1: I would start here http://developer.apple.com/library/ios/#referencelibrary/GettingStarted/GS_AudioVideo_iPhone/_index.html, try to record some raw sound file and then convert it to mp3 with some 3rd party library like LAME. You can pick up LAME source here: http:/

问题 I'm creating a basic MP3 player in ActionScript 3. I have a basic progress bar that indicates how much of the song has played. The progress is calculated as a decimal percentage normalized between 0 and 1 as such: var progress:Number = channel.position / sound.length; The problem is, if the audio is still loading/buffering the sound.length is incorrect. This causes my progress bar to skip around and even travel backwards until the sound has completely loaded and the sound.length isn't

问题 For better accessibility we needed a second alternative set of play/pause controls and (with the help of user Kento Nishi) we successfully moved from DEMO A (with only 1 audio playback control) to DEMO B (with duplicated audio playback controls). PROBLEM1 The time duration (far right number) is broken in DEMO B. PROBLEM2 Every webpage has its own folder. Some pages have a spoken audio file ready made, *.mp3 but some pages dont. Would it be possible to hide all audio controls html if the

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . Can anyone recommend a good library for generating an audio file, such as mp3, wav, or even midi, from python? I've seen recommendations for working with the id tags (song name, artist, etc) in mp3 files, but this is not my goal. 回答1: See http://wiki.python.org/moin/Audio/ and http://wiki.python.org/moin

问题 I want to download an mp3 file using an AsyncTask or a thread. How can I do this? 回答1: You can do something like this... When you decide to start downloading: new Thread(new Runnable() { @Override public void run() { File out; Downloader DDL; DDL=new Downloader(); out=new File(Environment.getExternalStorageDirectory() + "/DestFileName.txt"); DDL.DownloadFile("SourceURL",out); } }).start(); Where the downloader class is public class Downloader { public void Downloader() { // TODO Auto