I was able to setup my NAS mount thanks to the help of Frank and others - many thanks!
I have noticed that there is severe stuttering when playing 24 bit 192khz files which didn't seem to be a problem before. I tested a few 16bit 44.1khz and they are fine but the 24 bit 96khz files I tested occasionally stutter at the beginning of playback. I am using a wifi dongle with wireless correctly configured and haven't moved the pi to a different location so I don't think it's a problem with the signal strength as it would have occurred before. I would appreciate it if someone could help me out.
Thanks,
Al