But my NAS is set up to use iTunes and I wanted to stick with WAV files so glad to have found a working solution. The insurmountable problem appears to be the artwork, which iTunes won't export as far as I can tell. Probably the best solution is not to use iTunes at all.

Audio files in iTunes are stored, not surprisingly, in the Library. To open iTunes, go to Start > All Programs > iTunes >iTunes. The first step is to add your sound file to the iTunes library. Select the folder or disk that contains songs that you want to import and. Importing Your Sound Files into the iTunes Library. On your keyboard, hold down the Option key and choose File > Convert > Convert to import preference. Click the menu next to Import Using, then choose the encoding format that you want to convert the songs to.

The new AAC version of the song will appear underneath the original WAV file. Click the Files tab, then click Import Settings.

Click 'Create AAC Version' from the sub-menu to convert the WAV file to the iTunes AAC audio format. (Thank goodness the NAS stores each album in a separate folder.) This is a bit laborious and I need to delete the index each time I want new music to appear in the BlueSound app but it works and the Node is spectacular. Click the newly-imported WAV file in iTunes and click 'Advanced' at the top of the iTunes window. I simply select the relevant songs and an edit box appears that allows me to insert this information. In MediaMonkey I found the files stored on my NAS and what I found was the song titles but no album or artist info. My solution however was to download a programme called MediaMonkey onto my PC and use that to alter the files so the Node can recognise the artists and the album title. (Thank you to BlueSound support for running the tests to find this out). One answer is that WAV files in iTunes do not support metadata (which is already too technical for me but what it means is you get the song titles only, not artist or album info!) but other iTunes files do.

Import wav files to itunes