======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '213'
                                          'artist'  'Fleetwood Mac'
                                     'text_people'  'Danny Kirwan'
                                         'release'  'Then Play On'
                                           'title'  'My Dream'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'soft rock', 'rock', 'pop', 'classic rock']"
                                     'discogstags'  "['rock', 'blues rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '98.8'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 00000157 000001C8 00001099 00001231 00011800 0000FA34 00005F45 00005E32 '
 '0002ACCB 0002ACCB')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000870 00000000008FE800 00000000 004E431B 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'Then Play On'
'TBPM' (BPM (beats per minute))                     '98.8'
'TCOM' (Composer)                                   'Danny Kirwan'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1969'
'TENC' (Encoded by)                                 'iTunes 9.0.2.25'
'TIT2' (Title/songname/content description)         'My Dream'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Fleetwood Mac'
'TRCK' (Track number/Position in set)               '4'
'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:discogstags'                                  ['rock', 'blues rock', 'classic rock']
'TXXX:lastfmtags'                                   ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.97 dB'
'TXXX:replaygain_track_peak'                        '0.731538'

========================== row from database ==========================
                                              'id'  1530810
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/EASY Instr 70_s/Fleetwood Mac - My Dream.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  213
                                           'genre'  funk or soul
                                        'filesize'  5136215
                                           'mtime'  1628357824
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul EASY Instr 70_s funk or soul
                                      'tag_artist'  Fleetwood Mac
                                     'tag_release'  Then Play On
                                       'tag_title'  My Dream
                                             'bpm'  98.8
                                    'search_title'  'dream':2 'my':1
                                   'search_artist'  'fleetwood':1 'mac':2
                                  'search_release'  'on':3 'play':2 'then':1
                                     'search_rest'  '70':6 'easy':4 'funk':2 'instr':5 'or':8 's':7 'soul':3 'swing':1
                                    'search_combo'  '70':13 'dream':2A 'easy':11 'fleetwood':3B 'funk':9 'instr':12 'mac':4B 'my':1A 'on':7C 'or':15 'play':6C 's':14 'soul':10 'swing':8 'then':5C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
                                        'tag_date'  1969
                                     'discogstags'  ['rock', 'blues rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1628357824.4354196  (2021-08-07 19:37:04)
                             'size'  5136215