======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '161'
                                          'artist'  'David Bowie'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Round and Round'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classic rock', '80s', 'alternative', 'rock', 'glam rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1973'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-eos'
                                             'bpm'  '106.925'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '106.925'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-eos'
'TDRC' (Recording time)                             '1973'
'TIT2' (Title/songname/content description)         'Round and Round'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'David Bowie'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.49 dB'
'TXXX:replaygain_track_peak'                        '0.635193'

========================== row from database ==========================
                                              'id'  172273
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/David Bowie/David Bowie - 1973 - Aladdin Sane__MBZ;#David Bowie;#[non-album tracks];#0000-00-00;#08;#Round and Round.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  161
                                           'genre'  ifs-songwriter-eos
                                        'filesize'  2584137
                                           'mtime'  1637330489
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 1973 Aladdin Sane__MBZ;#David Bowie;#[non album tracks];#0000 00 00;#08;#Round ifs songwriter eos
                                      'tag_artist'  David Bowie
                                     'tag_release'  None
                                       'tag_title'  Round and Round
                                             'bpm'  106.925
                                    'search_title'  'and':2 'round':1
                                   'search_artist'  'bowie':2 'david':1
                                  'search_release'  
                                     'search_rest'  '00':21,22,25 '0000':18,20 '00singer':1 '08':23,26 '1973':4 'aladdin':5 'album':16 'bowie':12,14 'david':8,11 'eos':3 'ifs':28 'mbz':7,10 'non':13,15 'round':24,27 'sane':6,9 'songwriter':2 'tracks':17,19
                                    'search_combo'  '00':25,26,29 '0000':22,24 '00singer':5 '08':27,30 '1973':8 'aladdin':9 'album':20 'and':2A 'bowie':4B,16,18 'david':3B,12,15 'eos':7 'ifs':32 'mbz':11,14 'non':17,19 'round':1A,28,31 'sane':10,13 'songwriter':6 'tracks':21,23
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
                                        'tag_date'  1973
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637330489.2789285  (2021-11-19 15:01:29)
                             'size'  2584137