On my Ipad 2, hearing echo while playing podcasts, audiobooks, and iTunesU lectures; music is fine. This just started with OS5, and cannot find the .5x, 1x, 2x playback speed selection button like on previous OS. No echoes when playing back on my PC. Have tried various combinations of settings under Music; now have sound check off, EQ off, volume limit off. Last night, called apple Support, and they were not much help. Last night, did a complete restore with no success. Help????