======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '434'
                                          'artist'  'David Bowie'
                                     'text_people'  ''
                                         'release'  'Space Oddity'
                                           'title'  'Memory of a Free Festival'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classic rock', '80s', 'alternative', 'rock', 'glam rock']"
                                     'discogstags'  "['rock', 'classic rock', 'space rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-eos'
                                             'bpm'  '118.706'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Space Oddity'
'TBPM' (BPM (beats per minute))                     '118.706'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-eos'
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'Memory of a Free Festival'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'David Bowie'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'classic rock', 'space rock']
'TXXX:lastfmtags'                                   ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.55 dB'
'TXXX:replaygain_track_peak'                        '0.599434'

========================== row from database ==========================
                                              'id'  195161
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/David Bowie/David Bowie - 1969 - Space Oddity/MBZ;#David Bowie;#Space Oddity;#0000-00-00;#10;#Memory of a Free Festival.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  434
                                           'genre'  ifs-songwriter-eos
                                        'filesize'  6948402
                                           'mtime'  1623430280
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 1969 MBZ;#David Bowie;#Space Oddity;#0000 00 00;#10;#Memory ifs songwriter eos
                                      'tag_artist'  David Bowie
                                     'tag_release'  Space Oddity
                                       'tag_title'  Memory of a Free Festival
                                             'bpm'  118.706
                                    'search_title'  'a':3 'festival':5 'free':4 'memory':1 'of':2
                                   'search_artist'  'bowie':2 'david':1
                                  'search_release'  'oddity':2 'space':1
                                     'search_rest'  '00':17,18,21 '0000':14,16 '00singer':1 '10':19,22 '1969':4 'bowie':9,11 'david':6,8 'eos':3 'ifs':24 'mbz':5,7 'memory':20,23 'oddity':13,15 'songwriter':2 'space':10,12
                                    'search_combo'  '00':26,27,30 '0000':23,25 '00singer':10 '10':28,31 '1969':13 'a':3A 'bowie':7B,18,20 'david':6B,15,17 'eos':12 'festival':5A 'free':4A 'ifs':33 'mbz':14,16 'memory':1A,29,32 'oddity':9C,22,24 'of':2A 'songwriter':11 'space':8C,19,21
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', '80s', 'alternative', 'rock', 'glam rock']
                                        'tag_date'  1969
                                     'discogstags'  ['rock', 'classic rock', 'space rock']

============================== file details ==============================
                                           'mtime'  1623430280.0622358  (2021-06-11 18:51:20)
                             'size'  6948402