Using the latest versions, both 32 and 64 bit, problem the same with both.
With some ISO files the audio is lost, or sometimes plays at a very low level. Very occasionally the file will not open.
The problem occurs with files from any of my ISO creating programs. The same files however, play perfectly on all other ISO capable players.
The problem seems to be with the latest versions. Procedures and equipment are the same, and have worked perfectly until a few months ago.
Viddy