I'm trying to make a guitar practice website, and a critical functionality is to loop over very short mp3 files (a few seconds long), with absolutely zero gap in between. For example, it could a 4-measures-long chord progression, and I want to allow the user to loop over it seamlessly.
I tried using the HTML5 <audio> tag with the loop attribute. Google Chrome gives a small gap between the loops, but big enough to be totally unacceptable for my purpose. I haven't tested the other browsers, but I believe it won't work.
A possible workaround is to use ffmpeg to stream repetitions the same audio as an mp3. However, this costs a lot of bandwidth.
For myself I use Audacity to loop without gaps, but unfortunately Audacity doesn't have a web version.
So, do you have any ideas how I may loop over an mp3 in a browser with zero gap? I prefer non-Flash solutions, but if nothing else works I'll use Flash.
Edit: Thank you for all your suggestions. Flash turns out to work decently. I've made a toy demo at http://vmlucid.lcm.hk/~netvope/audio/flash.html. To my surprise (I use to associate Flash with resource hog and browser crashes only), Flash and ActionScript are rather well designed and easy to use. It took me only 3 hours on my first Flash project :)
in flash AS3 you can extract sound data with computeSpectrum() and give it to your Sound object exactly when it's needed (SampleDataEvent is fired).