======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '189'
                                          'artist'  'Terry Jacks'
                                     'text_people'  ''
                                         'release'  'Kuschelrock 3 (disc 2)'
                                           'title'  'Seasons in the Sun'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['canadian', 'rock', '70s', 'oldies', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '1988'
                                        'comments'  ''
                                           'genre'  'rock-cppex'
                                             'bpm'  '101.513'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Kuschelrock 3 (disc 2)'
'TBPM' (BPM (beats per minute))                     '101.513'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex'
'TDRC' (Recording time)                             '1988'
'TIT2' (Title/songname/content description)         'Seasons in the Sun'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Terry Jacks'
'TRCK' (Track number/Position in set)               '17'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['canadian', 'rock', '70s', 'oldies', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-1.13 dB'
'TXXX:replaygain_track_peak'                        '0.566541'

========================== row from database ==========================
                                              'id'  1317094
                                            'path'  /data/Music/Bulk/00poprockelectronic/Terry Jacks/Cat Stevens - Seasons In The Sun.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  189
                                           'genre'  rock-cppex
                                        'filesize'  2654892
                                           'mtime'  1620737311
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Cat Stevens In The cppex
                                      'tag_artist'  Terry Jacks
                                     'tag_release'  Kuschelrock 3 (disc 2)
                                       'tag_title'  Seasons in the Sun
                                             'bpm'  101.513
                                    'search_title'  'in':2 'seasons':1 'sun':4 'the':3
                                   'search_artist'  'jacks':2 'terry':1
                                  'search_release'  '2':5,6 '3':2 'disc':3,4 'kuschelrock':1
                                     'search_rest'  '00poprockelectronic':1 'cat':2 'cppex':6 'in':4 'stevens':3 'the':5
                                    'search_combo'  '00poprockelectronic':13 '2':11C,12C '3':8C 'cat':14 'cppex':18 'disc':9C,10C 'in':2A,16 'jacks':6B 'kuschelrock':7C 'seasons':1A 'stevens':15 'sun':4A 'terry':5B 'the':3A,17
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['canadian', 'rock', '70s', 'oldies', 'classic rock']
                                        'tag_date'  1988
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737310.7042792  (2021-05-11 14:48:30)
                             'size'  2654892