======================== unified (from filesystem) ========================
                                         'bitrate'  '217.508'
                                        'duration'  '228'
                                          'artist'  'Yo-Yo Ma'
                                     'text_people'  'Astor Piazzolla'
                                         'release'  'Soul of the Tango'
                                           'title'  'Fugata'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'Q-PIANO-3', 'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'contemporary classical', 'baroque', 'cello', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '123.6'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 0000060A 00000468 00002199 00002061 00024959 00024959 000079D8 00007FBE '
 '00024959 0002BE2E')
'TALB' (Album/Movie/Show title)                     'Soul of the Tango'
'TBPM' (BPM (beats per minute))                     '123.6'
'TCOM' (Composer)                                   'Astor Piazzolla'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Fugata'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Yo-Yo Ma'
'TPE2' (Band/orchestra/accompaniment)               'Yo-Yo Ma'
'TRCK' (Track number/Position in set)               '6'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME v3.97 (beta)'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['instrumental', 'contemporary classical', 'baroque', 'cello', 'classical']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.48 dB'
'TXXX:replaygain_track_peak'                        '0.608547'

========================== row from database ==========================
                                              'id'  399890
                                            'path'  /data/Music/Bulk/00instruments-classical/Yo-Yo Ma/[1997] Soul of the Tango/06 Fugata.mp3
                                         'working'  None
                                         'bitrate'  218
                                    'duration_sec'  228
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  6251060
                                           'mtime'  1658698886
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical [1997] 06 loc style tango or milonga
                                      'tag_artist'  Yo-Yo Ma
                                     'tag_release'  Soul of the Tango
                                       'tag_title'  Fugata
                                             'bpm'  123.6
                                    'search_title'  'fugata':1
                                   'search_artist'  'ma':4 'yo':1,2 'yoyo':3
                                  'search_release'  'of':2 'soul':1 'tango':4 'the':3
                                     'search_rest'  '00instruments':1 '1997':3,4 'classical':2 'loc':5 'milonga':9 'or':8 'style':6 'tango':7
                                    'search_combo'  '00instruments':10 '1997':12,13 'classical':11 'fugata':1A 'loc':14 'ma':5B 'milonga':18 'of':7C 'or':17 'soul':6C 'style':15 'tango':9C,16 'the':8C 'yo':2B,3B 'yoyo':4B
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', 'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', 'Q-PIANO-3', 'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-1', 'q-mixbeat-1']
                                      'lastfmtags'  ['instrumental', 'contemporary classical', 'baroque', 'cello', 'classical']
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1658698886.05242  (2022-07-24 23:41:26)
                             'size'  6251060