if(shuffle == Constants.SHUFFLE_NORMAL || shuffle == Constants.SHUFFLE_AUTO){
			/* it is the same whether is next or previous */
			Cursor cursor = getAllSongsFromPlaylist(playlistId);
			int retries = 0;
			nextAudioId = audioId;
			while(nextAudioId == audioId && retries <= 20){
				cursor.moveToPosition((int) (Math.random() * (cursor.getCount()-1)));
				nextAudioId =
					ContentProviderUnifier.
						getAudioIdFromUnknownCursor(cursor);
			}
			if(retries == 20)
				nextAudioId = -1;
			cursor.close();