======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '162'
                                          'artist'  'Uncle Dave Macon'
                                     'text_people'  ''
                                         'release'  'Keep My Skillet Good And Greasy'
                                           'title'  'All Go Hungry Hash House'
                                           '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-1', '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'  '30'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country-folk-banjo'
                                             'bpm'  '113.9'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 0000073F 00000001 0000A1ED 00001080 0001AE4E 000267B6 000076F7 000076F7 '
 '00023FD0 00023FD0')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000006F0 00000000006D9080 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'Keep My Skillet Good And Greasy'
'TBPM' (BPM (beats per minute))                     '113.9'
'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)         'All Go Hungry Hash House'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Uncle Dave Macon'
'TPOS' (Part of a set)                              '9'
'TRCK' (Track number/Position in set)               '30'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.61 dB'
'TXXX:replaygain_track_peak'                        '0.554954'

========================== row from database ==========================
                                              'id'  725506
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Keep My Skillet Good And Greasy/9-30 All Go Hungry Hash House.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  162
                                           'genre'  loc-namerica-country-folk-banjo
                                        'filesize'  3726245
                                           'mtime'  1621628782
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 9 30 loc namerica country folk banjo
                                      'tag_artist'  Uncle Dave Macon
                                     'tag_release'  Keep My Skillet Good And Greasy
                                       'tag_title'  All Go Hungry Hash House
                                             'bpm'  113.9
                                    'search_title'  'all':1 'go':2 'hash':4 'house':5 'hungry':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'  '30':2 '9':1 'banjo':7 'country':5 'folk':6 'loc':3 'namerica':4
                                    'search_combo'  '30':16 '9':15 'all':1A 'and':13C 'banjo':21 'country':19 'dave':7B 'folk':20 'go':2A 'good':12C 'greasy':14C 'hash':4A 'house':5A 'hungry':3A 'keep':9C 'loc':17 'macon':8B 'my':10C 'namerica':18 'skillet':11C 'uncle':6B
                                    'tag_tracknum'  30
                                      'num_images'  1
                                             'key'  8A
                                           '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'all', 'banjo', 'folk']
                                        'tag_date'  2004
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621628782.3671784  (2021-05-21 22:26:22)
                             'size'  3726245