I have an movie/music app, the Helix player for symbian , https://symbian.helixcommunity.org/, that was built using MDAAudioOutputStream on a Nokia 3650. When this app is run on a Nokia 6600 the audio often stutters like it is experiencing underflow or something. I have recompiled the app under the 2.1 beta SDK (still using MDA) and I get the same problem. Has some problem crept into the MDAAudioOutputStream support in 7.0? I am going to look at moving to devsound but it would really be nice if it just worked.