======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '184'
                                          'artist'  'Uncle Dave Macon'
                                     'text_people'  ''
                                         'release'  'Keep My Skillet Good And Greasy'
                                           'title'  'Old Dan Tucker'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'all', 'banjo', 'folk']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country-folk-banjo'
                                             'bpm'  '135.3'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 00000B3D 00000000 0000DFBB 00000C0F 0001D40F 000190EB 00008025 00008025 '
 '000175FA 000175FA')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000006F0 00000000007C7400 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'Keep My Skillet Good And Greasy'
'TBPM' (BPM (beats per minute))                     '135.3'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country-folk-banjo'
'TDRC' (Recording time)                             '2004'
'TENC' (Encoded by)                                 'iTunes v6.0.5.20'
'TIT2' (Title/songname/content description)         'Old Dan Tucker'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Uncle Dave Macon'
'TPOS' (Part of a set)                              '1'
'TRCK' (Track number/Position in set)               '16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['country', 'all', 'banjo', 'folk']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.16 dB'
'TXXX:replaygain_track_peak'                        '0.595893'

========================== row from database ==========================
                                              'id'  727186
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Keep My Skillet Good And Greasy/1-16 Old Dan Tucker.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  184
                                           'genre'  loc-namerica-country-folk-banjo
                                        'filesize'  3484843
                                           'mtime'  1621628678
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 1 16 loc namerica country folk banjo
                                      'tag_artist'  Uncle Dave Macon
                                     'tag_release'  Keep My Skillet Good And Greasy
                                       'tag_title'  Old Dan Tucker
                                             'bpm'  135.3
                                    'search_title'  'dan':2 'old':1 'tucker':3
                                   'search_artist'  'dave':2 'macon':3 'uncle':1
                                  'search_release'  'and':5 'good':4 'greasy':6 'keep':1 'my':2 'skillet':3
                                     'search_rest'  '1':1 'banjo':6 'country':4 'folk':5 'loc':2 'namerica':3
                                    'search_combo'  '1':13 'and':11C 'banjo':18 'country':16 'dan':2A 'dave':5B 'folk':17 'good':10C 'greasy':12C 'keep':7C 'loc':14 'macon':6B 'my':8C 'namerica':15 'old':1A 'skillet':9C 'tucker':3A 'uncle':4B
                                    'tag_tracknum'  16
                                      'num_images'  1
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'all', 'banjo', 'folk']
                                        'tag_date'  2004
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621628678.1543  (2021-05-21 22:24:38)
                             'size'  3484843