======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '57'
                                          'artist'  'Blowfly'
                                     'text_people'  ''
                                         'release'  'Butterfly'
                                           'title'  'Sign off'
                                           '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-1', 'q-drums-4', 'q-other-1', "
 "'q-piano-1', 'q-vocals-4', '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'  '15'
                                      'tracktotal'  ''
                                            'date'  '1981'
                                        'comments'  ''
                                           'genre'  'funk or soul-funk'
                                             'bpm'  '119.3'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Butterfly'
'TBPM' (BPM (beats per minute))                     '119.3'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk'
'TDRC' (Recording time)                             '1981'
'TIT2' (Title/songname/content description)         'Sign off'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Blowfly'
'TRCK' (Track number/Position in set)               '15'
'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'                                       '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.26 dB'
'TXXX:replaygain_track_peak'                        '0.671875'

========================== row from database ==========================
                                              'id'  1484954
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/blowfly - 1976 - butterfly/15 - sign off.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  57
                                           'genre'  funk or soul-funk
                                        'filesize'  929025
                                           'mtime'  1620665569
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy blowfly 1976 butterfly 15 sign funk or soul funk
                                      'tag_artist'  Blowfly
                                     'tag_release'  Butterfly
                                       'tag_title'  Sign off
                                             'bpm'  119.3
                                    'search_title'  'off':2 'sign':1
                                   'search_artist'  'blowfly':1
                                  'search_release'  'butterfly':1
                                     'search_rest'  '1976':3 'blowfly':2 'butterfly':4 'classicprogpsy':1 'funk':6 'or':7 'sign':5 'soul':8
                                    'search_combo'  '1976':7 'blowfly':3B,6 'butterfly':4C,8 'classicprogpsy':5 'funk':10 'off':2A 'or':11 'sign':1A,9 'soul':12
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-4', '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-1', 'Q-BUSY-2', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1']
                                      'lastfmtags'  ['funk', 'soul', 'comedy', 'hip-hop']
                                        'tag_date'  1981
                                     'discogstags'  ['funk', 'funk / soul']

============================== file details ==============================
                                           'mtime'  1620665569.281308  (2021-05-10 18:52:49)
                             'size'  929025