======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '218'
                                          'artist'  'Loose Ends'
                                     'text_people'  'Steve Nichol/Carl MacIntosh'
                                         'release'  '100 Hits: 90s Classics'
                                           'title'  "Hangin' on a String"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-3', 'Q-HHRNBTT-2', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'rnb', 'soul', 'funk', 'disco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '20'
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '102.749'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '100 Hits: 90s Classics'
'TBPM' (BPM (beats per minute))                     '102.749'
'TCMP'                                              '1'
'TCOM' (Composer)                                   'Steve Nichol/Carl MacIntosh'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         "Hangin' on a String"
'TKEY' (Initial key)                                '1A'
'TMED' (Media type)                                 'CD (Lossless)'
'TPE1' (Lead performer(s)/Soloist(s))               'Loose Ends'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '3/5'
'TPUB' (Publisher)                                  '100 Hits'
'TRCK' (Track number/Position in set)               '13/20'
'TSSE' (Software/Hardware and settings used for encoding)  '-b="320"'
'TXXX:AccurateRipDiscID'                            '020-003929b4-0345f64a-1312bc14-13'
'TXXX:AccurateRipResult'                            'AccurateRip: Not in database   Secure: Yes   [D1BD5C66]'
'TXXX:Catalog #'                                    'Demon Music Group DM'
'TXXX:Encoder'                                      'Lame 3.99.5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:UPC'                                          '654378711022'
'TXXX:lastfmtags'                                   ['80s', 'rnb', 'soul', 'funk', 'disco']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.32 dB'
'TXXX:replaygain_track_peak'                        '0.494391'

========================== row from database ==========================
                                              'id'  1510928
                                            'path'  /data/Music/Bulk/00poprockelectronic/1985 complete/218-A Loose Ends - Hangin_ on a String (single version).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  218
                                           'genre'  funk or soul
                                        'filesize'  8778063
                                           'mtime'  1628357917
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1985 complete 218 A Hangin_ (single version) funk or soul
                                      'tag_artist'  Loose Ends
                                     'tag_release'  100 Hits: 90s Classics
                                       'tag_title'  Hangin' on a String
                                             'bpm'  102.749
                                    'search_title'  'a':4 'hangin':1,2 'on':3 'string':5
                                   'search_artist'  'ends':2 'loose':1
                                  'search_release'  '100':1 '90s':4 'classics':5 'hits':2,3
                                     'search_rest'  '00poprockelectronic':1 '1985':2 '218':4 'a':5 'complete':3 'funk':11 'hangin':6 'or':12 'single':7,8 'soul':13 'version':9,10
                                    'search_combo'  '00poprockelectronic':13 '100':8C '1985':14 '218':16 '90s':11C 'a':4A,17 'classics':12C 'complete':15 'ends':7B 'funk':23 'hangin':1A,2A,18 'hits':9C,10C 'loose':6B 'on':3A 'or':24 'single':19,20 'soul':25 'string':5A 'version':21,22
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'rnb', 'soul', 'funk', 'disco']
                                        'tag_date'  1985
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357917.0192924  (2021-08-07 19:38:37)
                             'size'  8778063