======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '162'
                                          'artist'  'Flat & Scruggs'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'Foggy Mountain Breakdown'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-1', 'Q-UNU-2', 'q-syn-1', 'q-bass-4', "
 "'q-busy-2', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-1', 'q-other-4', "
 "'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-3']")
                                      'lastfmtags'  "['bluegrass', 'country', 'folk', 'classic country', 'americana']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '24'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '127.524'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000FE3 00001060 0000998F'
'COMM:iTunNORM:eng'                                 (' 00000FE3 00001060 0000998F 0000A12D 0001A9EB 0001A9EB 0000691A 000069BE '
 '000223DB 00014FD0')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B4C 00000000006CFC24 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '24+C4D8A204FB57B41248BE91BE7ED0B109+1988904'
'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '127.524'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TENC' (Encoded by)                                 'iTunes v6.0.4.2'
'TIT2' (Title/songname/content description)         'Foggy Mountain Breakdown'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Flat & Scruggs'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '9/24'
'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:lastfmtags'                                   ['bluegrass', 'country', 'folk', 'classic country', 'americana']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.29 dB'
'TXXX:replaygain_track_peak'                        '0.414104'

========================== row from database ==========================
                                              'id'  949428
                                            'path'  /data/Music/Bulk/sns/Lester Flatt & Earl Scruggs - Foggy Mountain Breakdown.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  162
                                           'genre'  loc-namerica-country
                                        'filesize'  6483703
                                           'mtime'  1621630400
                                   'redo_metaread'  0
                                        'rest_str'   sns Lester Flatt Earl loc namerica country
                                      'tag_artist'  Flat & Scruggs
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  Foggy Mountain Breakdown
                                             'bpm'  127.524
                                    'search_title'  'breakdown':3 'foggy':1 'mountain':2
                                   'search_artist'  'flat':1 'scruggs':2
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  'country':7 'earl':4 'flatt':3 'lester':2 'loc':5 'namerica':6 'sns':1
                                    'search_combo'  'breakdown':3A 'country':14 'earl':11 'flat':4B 'flatt':10 'foggy':1A 'lester':9 'loc':12 'mountain':2A 'namerica':13 'scruggs':5B 'shirley':6C 'sns':8 'spinoza':7C
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['bluegrass', 'country', 'folk', 'classic country', 'americana']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621630400.1237335  (2021-05-21 22:53:20)
                             'size'  6483703