Hi,
Thanks for specifying the requirement/issue clearly. I have been in mobile apps development for Android, iOS etc for last 4 years using Sencha Touch, Phonegap, jQuery , HTML5, CSS3 etc. I have gained expertise in Sencha Touch from my experience. I have myself faced a lot of issues with Sencha Touch in devices and solved those successfully. Your problem of not playing audio files is also something I can resolve in a short period of time. Please let me know if you are interested in working with me. Also, please let me know if you have any question. You can see my past reviews to get an idea about my work quality.
Thanks,
Ayan Dasgupta.