======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '571'
                                          'artist'  'Tortoise'
                                     'text_people'  ''
                                         'release'  'Standards'
                                           'title'  'Seneca'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['instrumental', 'post rock', 'instrumental rock', 'experimental', 'ambient']"
                                     'discogstags'  "['electronic', 'rock', 'post rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'rock-post'
                                             'bpm'  '102.230'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Standards'
'TBPM' (BPM (beats per minute))                     '102.230'
'TCON' (Content type, a.k.a. Genre)                 'rock-post'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Seneca'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tortoise'
'TPE2' (Band/orchestra/accompaniment)               'Tortoise'
'TRCK' (Track number/Position in set)               '1'
'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'                                  ['electronic', 'rock', 'post rock']
'TXXX:lastfmtags'                                   ['instrumental', 'post rock', 'instrumental rock', 'experimental', 'ambient']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.24 dB'
'TXXX:replaygain_track_peak'                        '0.528843'

========================== row from database ==========================
                                              'id'  1286987
                                            'path'  /data/Music/Bulk/00poprockelectronic/Tortoise/Standards/Tortoise - Standards - 01 - Seneca.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  571
                                           'genre'  rock-post
                                        'filesize'  9150336
                                           'mtime'  1621489562
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 01 rock post
                                      'tag_artist'  Tortoise
                                     'tag_release'  Standards
                                       'tag_title'  Seneca
                                             'bpm'  102.23
                                    'search_title'  'seneca':1
                                   'search_artist'  'tortoise':1
                                  'search_release'  'standards':1
                                     'search_rest'  '00poprockelectronic':1 'post':3 'rock':2
                                    'search_combo'  '00poprockelectronic':4 'post':6 'rock':5 'seneca':1A 'standards':3C 'tortoise':2B
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-3', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'post rock', 'instrumental rock', 'experimental', 'ambient']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic', 'rock', 'post rock']

============================== file details ==============================
                                           'mtime'  1621489561.6476896  (2021-05-20 07:46:01)
                             'size'  9150336