======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '339'
                                          'artist'  'Blowfly'
                                     'text_people'  ''
                                         'release'  'Butterfly'
                                           'title'  "Blowfly's Convoy"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-UNU-1', 'Q-JZFKS-4', "
 "'Q-OLDST-3', 'Q-BUSY-2', 'Q-GRIT-2', 'q-bass-3', 'q-drums-4', 'q-other-2', "
 "'q-piano-1', 'q-vocals-3', 'Q-SYN-2', 'Q-PLAY-3', 'Q-CHART-2', "
 "'Q-MIXBEAT-2']")
                                      'lastfmtags'  "['funk', 'soul', 'comedy', 'hip-hop']"
                                     'discogstags'  "['funk', 'funk / soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1981'
                                        'comments'  ''
                                           'genre'  'funk or soul-funk'
                                             'bpm'  '106.6'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Butterfly'
'TBPM' (BPM (beats per minute))                     '106.6'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk'
'TDRC' (Recording time)                             '1981'
'TIT2' (Title/songname/content description)         "Blowfly's Convoy"
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Blowfly'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-BUSY'                                       '2'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '4'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-SYN'                                        '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['funk', 'funk / soul']
'TXXX:lastfmtags'                                   ['funk', 'soul', 'comedy', 'hip-hop']
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+3.21 dB'
'TXXX:replaygain_track_peak'                        '0.674565'

========================== row from database ==========================
                                              'id'  1507045
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/blowfly - 1976 - butterfly/03 - blowfly_s convoy.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  339
                                           'genre'  funk or soul-funk
                                        'filesize'  5440909
                                           'mtime'  1620665569
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy blowfly 1976 butterfly 03 blowfly_s convoy funk or soul funk
                                      'tag_artist'  Blowfly
                                     'tag_release'  Butterfly
                                       'tag_title'  Blowfly's Convoy
                                             'bpm'  106.6
                                    'search_title'  'blowfly':1 'blowflys':3 'convoy':4 's':2
                                   'search_artist'  'blowfly':1
                                  'search_release'  'butterfly':1
                                     'search_rest'  '1976':3 'blowfly':2,5 'butterfly':4 'classicprogpsy':1 'convoy':7 'funk':8 'or':9 's':6 'soul':10
                                    'search_combo'  '1976':9 'blowfly':1A,5B,8,11 'blowflys':3A 'butterfly':6C,10 'classicprogpsy':7 'convoy':4A,13 'funk':14 'or':15 's':2A,12 'soul':16
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-3', 'Q-GRIT-2', 'Q-UNU-1', 'Q-JZFKS-4', 'Q-CHART-2', 'q-drums-4', 'Q-SYN-2', 'q-other-2', 'Q-BUSY-2', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-3']
                                      'lastfmtags'  ['funk', 'soul', 'comedy', 'hip-hop']
                                        'tag_date'  1981
                                     'discogstags'  ['funk', 'funk / soul']

============================== file details ==============================
                                           'mtime'  1620665568.5699308  (2021-05-10 18:52:48)
                             'size'  5440909