[GraemeJ]

..... it would helpful to know where the audio files are located on your device.

Thanks,
Mike

Well, that's a good question  . Initially many of the audio files are placed on the external card, the rest would be where Android sticks them by default. 

I use the default MSP storage mechanism of one directory per song (and all stored on the external card).  So, once I have linked MSP to any audio, file they are then stuck in the same directory as the corresponding music chart.  

As it's exactly the same audio that's not appearing on two separate tablets, I'm starting to wonder if it's a problem that's down to the MP3's themselves.  When I get the time, I'll have a closer look at them and see if there's something funny with their structure.

I stress this is not a major problem for me.  Firstly, it's only some eight or nine audio files that are missing (don't know how many there are in total, but it must be well into three figures).  Secondly, it's not like they are tracks I need for a performance, they only there for rehearsal reference.