======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '276'
                                          'artist'  'Metric'
                                     'text_people'  ''
                                         'release'  'Old World Underground, Where Are You Now?'
                                           'title'  'On a Slow Night'
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                                      'lastfmtags'  "['indie', 'rock', 'female vocalists', 'indie rock', 'canadian']"
                                     'discogstags'  "['electronic', 'rock', 'new wave', 'indie rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '10'
                                            'date'  '2015'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-rock'
                                             'bpm'  '140'
                                             'key'  '2A'
                                        'acoustid'  '4af18199-add7-491b-89e4-7239c16e063e'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Old World Underground, Where Are You Now?'
'TBPM' (BPM (beats per minute))                     '140'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-rock'
'TDOR' (Original release time)                      '2003'
'TDRC' (Recording time)                             '2015-06-16'
'TIT2' (Title/songname/content description)         'On a Slow Night'
'TKEY' (Initial key)                                '2A'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'Metric'
'TPE2' (Band/orchestra/accompaniment)               'Metric'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Everloving Records'
'TRCK' (Track number/Position in set)               '7/10'
'TSO2'                                              'Metric'
'TSOP' (Performer sort order)                       'Metric'
'TSRC' (ISRC (international standard recording code))  'USER80300607'
'TXXX:ASIN'                                         'B00XA6BXXO'
'TXXX:Acoustid Id'                                  '4af18199-add7-491b-89e4-7239c16e063e'
'TXXX:Artists'                                      'Metric'
'TXXX:BARCODE'                                      '812208013788'
'TXXX:CATALOGNUMBER'                                'EVE006'
'TXXX:MusicBrainz Album Artist Id'                  '4449ccf6-c948-4d33-aa97-b6ad98ce4b5b'
'TXXX:MusicBrainz Album Id'                         'fdd9dfac-e330-4483-a80e-14c42218240b'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '4449ccf6-c948-4d33-aa97-b6ad98ce4b5b'
'TXXX:MusicBrainz Release Group Id'                 '035d5246-d0d4-34d5-bb4e-3c93c5065445'
'TXXX:MusicBrainz Release Track Id'                 '0dd48e63-648c-486d-b981-e7ecf2e9ee71'
'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:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['electronic', 'rock', 'new wave', 'indie rock']
'TXXX:lastfmtags'                                   ['indie', 'rock', 'female vocalists', 'indie rock', 'canadian']
'TXXX:originalyear'                                 '2003'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.49 dB'
'TXXX:replaygain_track_peak'                        '0.509170'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'fd6c1e85-9278-4dba-9c97-0599f16c241d')

========================== row from database ==========================
                                              'id'  1363323
                                            'path'  /data/Music/Bulk/00poprockelectronic-poprock-indierock/Metric/Metric - 07 - On A Slow Night.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  276
                                           'genre'  ifs-songwriter-indie-rock
                                        'filesize'  6691296
                                           'mtime'  1621697327
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic poprock indierock 07 ifs songwriter indie rock
                                      'tag_artist'  Metric
                                     'tag_release'  Old World Underground, Where Are You Now?
                                       'tag_title'  On a Slow Night
                                             'bpm'  140.0
                                    'search_title'  'a':2 'night':4 'on':1 'slow':3
                                   'search_artist'  'metric':1
                                  'search_release'  'are':6 'now':8 'old':1 'underground':3,4 'where':5 'world':2 'you':7
                                     'search_rest'  '00poprockelectronic':1 'ifs':4 'indie':6 'indierock':3 'poprock':2 'rock':7 'songwriter':5
                                    'search_combo'  '00poprockelectronic':14 'a':2A 'are':11C 'ifs':17 'indie':19 'indierock':16 'metric':5B 'night':4A 'now':13C 'old':6C 'on':1A 'poprock':15 'rock':20 'slow':3A 'songwriter':18 'underground':8C,9C 'where':10C 'world':7C 'you':12C
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'rock', 'female vocalists', 'indie rock', 'canadian']
                                        'tag_date'  2015
                                     'discogstags'  ['electronic', 'rock', 'new wave', 'indie rock']

============================== file details ==============================
                                           'mtime'  1621697326.8399293  (2021-05-22 17:28:46)
                             'size'  6691296