======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '157'
                                          'artist'  'Joni Mitchell'
                                     'text_people'  ''
                                         'release'  'Live Hawaii 1973, BBC 1972'
                                           'title'  'Big Yellow Taxi (BBC 1972)'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-2', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk;ifs-songwriter-eos'
                                             'bpm'  '109.824'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Live Hawaii 1973, BBC 1972'
'TBPM' (BPM (beats per minute))                     '109.824'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-folk', 'ifs-songwriter-eos']
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         'Big Yellow Taxi (BBC 1972)'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Joni Mitchell'
'TPOS' (Part of a set)                              '1'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.27 dB'
'TXXX:replaygain_track_peak'                        '0.412978'

========================== row from database ==========================
                                              'id'  182011
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Joni Mitchell/BBC 1972/01 - big yellow taxi.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  157
                                           'genre'  ifs-songwriter-folk;ifs-songwriter-eos
                                        'filesize'  3790472
                                           'mtime'  1636400360
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 01 big yellow taxi ifs songwriter folk;ifs songwriter eos
                                      'tag_artist'  Joni Mitchell
                                     'tag_release'  Live Hawaii 1973, BBC 1972
                                       'tag_title'  Big Yellow Taxi (BBC 1972)
                                             'bpm'  109.824
                                    'search_title'  '1972':6,7 'bbc':4,5 'big':1 'taxi':3 'yellow':2
                                   'search_artist'  'joni':1 'mitchell':2
                                  'search_release'  '1972':6 '1973':3,4 'bbc':5 'hawaii':2 'live':1
                                     'search_rest'  '00singer':1 'big':4 'eos':3 'folk':8,10 'ifs':7,9,11 'songwriter':2 'taxi':6 'yellow':5
                                    'search_combo'  '00singer':16 '1972':6A,7A,15C '1973':12C,13C 'bbc':4A,5A,14C 'big':1A,19 'eos':18 'folk':23,25 'hawaii':11C 'ifs':22,24,26 'joni':8B 'live':10C 'mitchell':9B 'songwriter':17 'taxi':3A,21 'yellow':2A,20
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['acoustic', 'canadian', 'female vocalists', 'folk', 'singer songwriter']
                                        'tag_date'  1972
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636400360.0580347  (2021-11-08 20:39:20)
                             'size'  3790472