Audio/file-coupled DjmdContent columns:
['FolderPath', 'FileNameL', 'FileNameS', 'Length', 'BitRate', 'BitDepth', 'FileType', 'OrgArtistID', 'ImagePath', 'AnalysisDataPath', 'FileSize', 'SampleRate', 'Analysed', 'AnalysisUpdated', 'OrgFolderPath', 'rb_file_id', 'rb_LocalFolderPath', 'SrcLength']

Example values (real MP3 ID=131718786):
   FolderPath = 'A:/Music/Kelly Lee Owens - Melt! (2020) - WEB 320/01. Melt!.mp3'
   FileNameL = '01. Melt!.mp3'
   FileNameS = ''
   Length = 214
   BitRate = 320
   BitDepth = 16
   FileType = 1
   OrgArtistID = None
   ImagePath = ''
   AnalysisDataPath = '/PIONEER/USBANLZ/a90/af2bc-81b0-4a73-88df-ef5d3b4ae45e/ANLZ0000.DAT'
   FileSize = 8596920
   SampleRate = 44100
   Analysed = 105
   AnalysisUpdated = '3'
   OrgFolderPath = ''
   rb_file_id = '3096224743833404'
   rb_LocalFolderPath = None
   SrcLength = None

Convert WRITES: ['BitDepth', 'BitRate', 'FileNameL', 'FileType', 'FolderPath', 'SampleRate']
Potentially-stale audio/file columns convert does NOT write:
['Analysed', 'AnalysisDataPath', 'AnalysisUpdated', 'FileNameS', 'FileSize', 'ImagePath', 'Length', 'OrgArtistID', 'OrgFolderPath', 'SrcLength', 'rb_LocalFolderPath', 'rb_file_id']
