Rpg Maker Developers Group

I've tried with different projects already and the result is the same: With some phone and tablet models in the emulator tab, I get an error telling me that the game can't find the title .m4a music or the cursor .m4a sound and I already have those files in their respective folder. If I build the apk and then install the game on my Galaxy S4, I get a similar error and I can't play it there either.
 

This is what I get with the debugger:

"Console was cleared /C:/Users/ayask/AppData/Local/Intel/XDK/xdk/components/client/emulator/index.js:17

Error: Failed to load: audio/bgm/Mystic%20Quest.m4a

    at Function.AudioManager.checkWebAudioError (http://127.0.0.1:58889/http-services/emulator-webserver/ripple/userapp/x/C/Users/ayask/Documents/NeutralLord/www/js/rpg_managers.js:1193:15)

    at Function.AudioManager.checkErrors (http://127.0.0.1:58889/http-services/emulator-webserver/ripple/userapp/x/C/Users/ayask/Documents/NeutralLord/www/js/rpg_managers.js:1180:10)

    at Scene_Title.Scene_Base.update (http://127.0.0.1:58889/http-services/emulator-webserver/ripple/userapp/x/C/Users/ayask/Documents/NeutralLord/www/js/rpg_scenes.js:43:18)

    at Scene_Title.update (http://127.0.0.1:58889/http-services/emulator-webserver/ripple/userapp/x/C/Users/ayask/Documents/NeutralLord/www/js/rpg_scenes.js:265:33)

    at Function.SceneManager.updateScene (http://127.0.0.1:58889/http-services/emulator-webserver/ripple/userapp/x/C/Users/ayask/Documents/NeutralLord/www/js/rpg_managers.js:1673:25)

    at Function.SceneManager.updateMain (http://127.0.0.1:58889/http-services/emulator-webserver/ripple/userapp/x/C/Users/ayask/Documents/NeutralLord/www/js/rpg_managers.js:1641:10)

    at Function.SceneManager.update (http://127.0.0.1:58889/http-services/emulator-webserver/ripple/userapp/x/C/Users/ayask/Documents/NeutralLord/www/js/rpg_managers.js:1576:14) rpg_managers.js:1618"

 

Am I doing something wrong? Thanks in advance.

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