======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '289'
                                          'artist'  'Airplay'
                                     'text_people'  'T.Hendrick_K.van Haaren_A.Martin_Krause'
                                         'release'  ''
                                           'title'  'September Love'
                                           'quals'  "['q-bass-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'pop,eighties,zomgeighties'
                                             'bpm'  '117.6'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TBPM' (BPM (beats per minute))                     '117.6'
'TCOM' (Composer)                                   'T.Hendrick_K.van Haaren_A.Martin_Krause'
'TCON' (Content type, a.k.a. Genre)                 'pop,eighties,zomgeighties'
'TCOP' (Copyright message)                          'Coconut'
'TDRC' (Recording time)                             '1985'
'TENC' (Encoded by)                                 'Åù¸ áîëüøå òîëüêî ïî òåë. 98900'
'TIT2' (Title/songname/content description)         'September Love'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Airplay'
'TRCK' (Track number/Position in set)               '15'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.87, 256 Kbit/s, Stereo, High quality'
'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.20 dB'
'TXXX:replaygain_track_peak'                        '0.614901'

========================== row from database ==========================
                                              'id'  1538138
                                            'path'  /data/Music/Other/PrevSet/[7zomgeighties]/Airplay - September Love.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  289
                                           'genre'  pop,eighties,zomgeighties
                                        'filesize'  9263188
                                           'mtime'  1662800614
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [7zomgeighties] pop,eighties,zomgeighties
                                      'tag_artist'  Airplay
                                     'tag_release'  None
                                       'tag_title'  September Love
                                             'bpm'  117.6
                                    'search_title'  'love':2 'september':1
                                   'search_artist'  'airplay':1
                                  'search_release'  
                                     'search_rest'  '7zomgeighties':2,3 'eighties':5,8 'pop':4,7 'prev':10 'prevset':1 'set':11 'zomgeighties':6,9
                                    'search_combo'  '7zomgeighties':5,6 'airplay':3B 'eighties':8,11 'love':2A 'pop':7,10 'prev':13 'prevset':4 'september':1A 'set':14 'zomgeighties':9,12
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['q-bass-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1']
                                      'lastfmtags'  []
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800613.6348052  (2022-09-10 11:03:33)
                             'size'  9263188