m4a cut short!

[cowgap]

I am having problems listening to m4a files on my Linn Majik DS-I, via MinimServer on my Synology 415play NAS, and the Linn Kazoo control point.

An example 18 minute file, that plays perfectly via the Synology DiskStation server to the Linn Majik (the Kazoo info screen shows 18 minutes duration), will only play the first 50 seconds via the MinimServer (the info screen shows the same file is only 50 seconds duration - so no real surprises there).

The stream.transcode property is set to flac:wave, mp4:wav. Originally, this only showed flac:wav and I couldn't hear the m4a file at all.

Everything works perfectly when streaming to my Naim Superuniti 2, using the Naim app via either the DiskStation server or Minimserver.

I've read about and played with this problem for ages but am now stuck and would appreciate some help, please.