======================== unified (from filesystem) ========================
                                         'bitrate'  '170.588'
                                        'duration'  '149'
                                          'artist'  'Calexico'
                                     'text_people'  'John Convertino'
                                         'release'  'The Black Light'
                                           'title'  'Old Man Waltz'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'indie', 'fip', 'polyaztone']"
                                     'discogstags'  "['rock', 'folk rock', 'post rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  '17'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-unsorted;rock-pop-indie'
                                             'bpm'  '139.658'
                                             'key'  '8A'
                                        'acoustid'  'c72933ad-8141-4c15-b443-b4325f0bc770'
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Black Light'
'TBPM' (BPM (beats per minute))                     '139.658'
'TCOM' (Composer)                                   'John Convertino'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-indie-unsorted', 'rock-pop-indie']
'TDRC' (Recording time)                             '1998-05-19'
'TIT2' (Title/songname/content description)         'Old Man Waltz'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Calexico'
'TPE2' (Band/orchestra/accompaniment)               'Calexico'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '15/17'
'TSO2'                                              'Calexico'
'TSOP' (Performer sort order)                       'Calexico'
'TSRC' (ISRC (international standard recording code))  'DED629870715'
'TXXX:ASIN'                                         'B0000064B7'
'TXXX:Acoustid Id'                                  'c72933ad-8141-4c15-b443-b4325f0bc770'
'TXXX:BARCODE'                                      '036172005222'
'TXXX:CATALOGNUMBER'                                'QS52CD'
'TXXX:LABEL'                                        'Quarterstick Records'
'TXXX:MEDIA'                                        'CD'
'TXXX:MusicBrainz Album Artist Id'                  '5e372a49-5672-4fb8-ba14-18c90780c4f9'
'TXXX:MusicBrainz Album Id'                         '4ab1472b-d880-3b5c-995d-6c52ff409496'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '5e372a49-5672-4fb8-ba14-18c90780c4f9'
'TXXX:MusicBrainz Track Id'                         '8ff4bcc1-c1c5-41e9-853d-6748360dedba'
'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:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock', 'folk rock', 'post rock']
'TXXX:iTunes_CDDB_IDs'                              '17+B097FBC7BB7EE9EF63274FC2C794672B+657195'
'TXXX:lastfmtags'                                   ['instrumental', 'indie', 'fip', 'polyaztone']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.93 dB'
'TXXX:replaygain_track_peak'                        '0.718809'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1286688
                                            'path'  /data/Music/Bulk/00poprockelectronic/Calexico/The Black Light/15 Old Man Waltz.mp3
                                         'working'  None
                                         'bitrate'  170
                                    'duration_sec'  149
                                           'genre'  ifs-songwriter-indie-unsorted;rock-pop-indie
                                        'filesize'  3194294
                                           'mtime'  1638554328
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 15 ifs songwriter indie unsorted;rock pop indie
                                      'tag_artist'  Calexico
                                     'tag_release'  The Black Light
                                       'tag_title'  Old Man Waltz
                                             'bpm'  139.658
                                    'search_title'  'man':2 'old':1 'waltz':3
                                   'search_artist'  'calexico':1
                                  'search_release'  'black':2 'light':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 'ifs':2 'indie':4 'pop':9 'rock':6,8 'songwriter':3 'unsorted':5,7
                                    'search_combo'  '00poprockelectronic':8 'black':6C 'calexico':4B 'ifs':9 'indie':11 'light':7C 'man':2A 'old':1A 'pop':16 'rock':13,15 'songwriter':10 'the':5C 'unsorted':12,14 'waltz':3A
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', '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-4', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'indie', 'fip', 'polyaztone']
                                        'tag_date'  1998
                                     'discogstags'  ['rock', 'folk rock', 'post rock']

============================== file details ==============================
                                           'mtime'  1638554328.3923783  (2021-12-03 18:58:48)
                             'size'  3194294