As3 mp3 encode problem

Question

Hi,
We are developing an app that could play mp3s from a music store. We found that the downloaded mp3 from the store can't play be as3's Sound class. The file's information can be load, but just not to play. Same code (something like new Sound(); load(urlrequest);play();..) will work to some of other mp3s. I've searched from internet. Looks like this is only way to play mp3s by AS3. Some older AS2 code could play these mp3s by sound.loadSound(). I don't understand why the old method is better than the newer one, and it is in same flash editor and player. I re-encoded the mp3s by Adobe Media Encoder, and the AS3 player will work. But I can't do it for every customer's downloaded mp3. From internet, I can't find what is the specification of Flash friendly mp3 Encode. And every other mp3 player can play these mp3s even Flash AS2.
Please help!
Andy

Answer 1

The reason I listed as3 and as2 code with local mp3 is showing you even the code is simple like that, it is still not working. So I don't expect it could work with more complicated situation, and how wired it isthat AS2 code could work but not AS3.
It will be an iOS app, but anyway it will be running by swf, right?
The music will be downloaded from the music store, but it will be running in the local folder, not stream from internet.
So the code for music playing will just be like that:
import flash.media.*;
  var snd:Sound = new Sound();
  snd.load(new URLRequest("Music.mp3"));
  snd.play();