======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '270'
                                          'artist'  'Tom Waits'
                                     'text_people'  ''
                                         'release'  'Closing Time'
                                           'title'  'Martha'
                                           'quals'  ("['Q-JZFKS-2', 'Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-OLDST-2', "
 "'Q-HHRNBTT-1', 'Q-PLAY-3', 'q-syn-2', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-vocals-3', 'q-mixbeat-1', "
 "'Q-PIANO-4']")
                                      'lastfmtags'  "['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']"
                                     'discogstags'  "['jazz', 'rock', 'folk rock', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1973'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-eos;set-pl-sced'
                                             'bpm'  '123.557'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000001B7 00000145 0000097F'
'COMM:iTunNORM:eng'                                 (' 000001B7 00000145 0000097F 000006A7 0002E647 0002E675 000042C8 0000392A '
 '0002E647 0001FBFE')
'TALB' (Album/Movie/Show title)                     'Closing Time'
'TBPM' (BPM (beats per minute))                     '123.557'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-eos', 'set-pl-sced']
'TDRC' (Recording time)                             '1973'
'TIT2' (Title/songname/content description)         'Martha'
'TKEY' (Initial key)                                '5B'
'TLEN' (Length)                                     '270785'
'TPE1' (Lead performer(s)/Soloist(s))               'Tom Waits'
'TPE2' (Band/orchestra/accompaniment)               'Tom Waits'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['jazz', 'rock', 'folk rock', 'pop rock']
'TXXX:lastfmtags'                                   ['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.12 dB'
'TXXX:replaygain_track_peak'                        '0.647668'

========================== row from database ==========================
                                              'id'  1366491
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/00songwriter-eos/Tom Waits/[1973] Closing Time/06 Martha.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  270
                                           'genre'  ifs-songwriter-eos;set-pl-sced
                                        'filesize'  4354917
                                           'mtime'  1639508258
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 00songwriter eos [1973] 06 ifs songwriter eos;set pl sced
                                      'tag_artist'  Tom Waits
                                     'tag_release'  Closing Time
                                       'tag_title'  Martha
                                             'bpm'  123.557
                                    'search_title'  'martha':1
                                   'search_artist'  'tom':1 'waits':2
                                  'search_release'  'closing':1 'time':2
                                     'search_rest'  '00singer':1 '00songwriter':4 '1973':5,6 'eos':3,8,10 'ifs':7 'pl':12 'sced':13 'set':9,11 'songwriter':2
                                    'search_combo'  '00singer':6 '00songwriter':9 '1973':10,11 'closing':4C 'eos':8,13,15 'ifs':12 'martha':1A 'pl':17 'sced':18 'set':14,16 'songwriter':7 'time':5C 'tom':2B 'waits':3B
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-1', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']
                                        'tag_date'  1973
                                     'discogstags'  ['jazz', 'rock', 'folk rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1639508258.0555904  (2021-12-14 19:57:38)
                             'size'  4354917