Depending on what you're building, it could be very easy or extremely difficult. When posting on mailing lists, you need to give other developers more information about your application so we can give you useful information. Also, for general web-dev questions, sites like stackoverflow.com can usually provide better answers, and if you're unfamiliar with google's site: and inurl: operators<http://support.google.com/websearch/bin/answer.py?hl=en&p=adv_operators&answer=136861>, learning how to use them will make your life immensely easier. First off, are you doing this in the client (web browser) or the server? For mixing audio files on the server side, you'd want to use ffMPEG + whatever PHP interface library you prefer to control it. You would use either uncompressed WAV files or a compressed format like MP3 depending on how disk-bound the server is. For the client side, you would never send the data as a WAV file because it would use 10 times as much bandwidth as a MP3. Most developers would use Adobe Flash to load the files and mix them. You could also experiment with HTML5, but the majority of browsers *currently in use* don't have enough HTML5 audio support to get the job done. See the Wikipedia article on HTML5. Another consideration is the number and size of audio files. If you're using simple HTML GET requests to fetch your files, you can't use a file until the *entire* file has been transferred. If you have big files or lots of files, this could be a problem. The usual solution is to use a streaming server like RED5 or LightHTTPD's progressive download. Look it up on Wikipedia. Saving the output to disk is another consideration. If you have to do this, the only practical option would be to do it on the server side. Writing code to decompress an audio file, mix it, and re-compress it in Adobe Flash or JavaScript would be a massive project. So, in terms of "simple/doable" ...depending on whether you're trying to mix sound-effects for a hack-a-thon web game, or whether you're trying to build an online DJ mixing system ...you're looking at anything from a full day's work to a 5-year project. ^C^ =========================================================== How simple/doable would it be to do something like sort of dynamically combine multiple .wav files into a single file/output track? Know that should be doable, but firstly wonder if something like .wav files could be combined into one sort of output file, or if it might be better to rather trigger their playback using something like JQuery, or something so they then seemed to be combined, but while still separate..? Stay well
