Load your original audio sample and your decoded (from mp3|ogg|mpc|ect) into this utility and check if you really can hear the difference via this blind listening test. (original idea from pcabx.com) Script will run offline as well.
Developer: somestuff.org Platform: Windows, IE Date upd:2004-03-05 Hits2650 [Visit]

BlueStreamer™ is on-line application written in JavaScript and Macromedia Flash, which you make instantaneous playback .mp3 set saved anywhere in Internet (streaming-without downloading). For webmasters or holder of www pages is available likewise simple JavaScript code, which make after small change adjustment playback files
Developer: myblueday.com Platform: Win, IE5+ Date upd:2004-07-19 Hits11106 [Download] [Visit]

Add a sound effect to your webpage for certain actions, such as when the user moves his mouse over a link, with this script. ThisIE-only script is simple yet versatile, allowing you to instantly apply the sound to multiple items on the page. Relies
Developer: Dynamic Drive Platform: linux, windows Date upd:2005-03-23 Hits3521 [Visit]

Embed Background music in your page. Control setup and options for both Netscape and Internet Explorer.
Developer: ricocheting.com Platform: Date upd:2000-10-05 Hits18971 [Visit]

QSound object outputs an audio clip through wave/midi interface. This class enriches a multimedia application or game with various sound effects. The media file gets buffered when the object is created. QSound control is ready for instant playing of sound clip right after browser
Developer: qlib.quazzle.com Platform: Date upd:2003-04-23 Hits3193 [Visit]