Hi , I have written a simple Audio Recorder. It compiles and runs properly but the problem is , I cant play back the recorded contents. When i tried to play back the files it said"Sorry, the player does not support this kind of audio files". I have enabled the SD card support by "./emulator -sdcard sd_card.img" command in emulator. when i enter this command the emulator issues a warning saying "Opening Audio Output failed". In my code i have specified the outputfile as "/sdcard/test.3gpp". first i have used "Environment.getExternalStorageDirectory()" to specify "setOutputFile()". then my recorded contents poppulated in "Menu->Music->Songs " but i could not play them due to above mentioned problem"Sorry, the player does not support this kind of audio files". If i use "/sdcard/test.3gpp" (Hard coded) i could not see the files on emulator. In DDMS if i see logcat it says "Network time out". I have altered the Android manifest file also to add the AUDIO permission after the <intent_filter> field. Please annyone help me in solving this problem.. Thanks in Advance. Jason.