======================== unified (from filesystem) ========================
                                         'bitrate'  '169.739'
                                        'duration'  '387'
                                          'artist'  'Prince'
                                     'text_people'  ''
                                         'release'  "Sign 'O' The Times (Disk 2)"
                                           'title'  'I Could Never Take The Place Of Your Man'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-3', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['80s', 'rock', 'pop', 'funk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '7'
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'funk or soul-funk-pop'
                                             'bpm'  '145.895'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             '4B094D07'
'COMM:ID3v1 Comment:XXX'                            '4B094D07'
'TALB' (Album/Movie/Show title)                     "Sign 'O' The Times (Disk 2)"
'TBPM' (BPM (beats per minute))                     '145.895'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk-pop'
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'I Could Never Take The Place Of Your Man'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Prince'
'TRCK' (Track number/Position in set)               '4/7'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.89, VBR 3, Stereo, High quality'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['80s', 'rock', 'pop', 'funk']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.28 dB'
'TXXX:replaygain_track_peak'                        '0.592396'

========================== row from database ==========================
                                              'id'  1522936
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Prince/Sign _O_ The Times/Prince - 04 - I Could Never Take The Place Of Your Man.mp3
                                         'working'  None
                                         'bitrate'  169
                                    'duration_sec'  387
                                           'genre'  funk or soul-funk-pop
                                        'filesize'  8230784
                                           'mtime'  1620531345
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country _O_ 04 funk or soul funk pop
                                      'tag_artist'  Prince
                                     'tag_release'  Sign 'O' The Times (Disk 2)
                                       'tag_title'  I Could Never Take The Place Of Your Man
                                             'bpm'  145.895
                                    'search_title'  'could':2 'i':1 'man':9 'never':3 'of':7 'place':6 'take':4 'the':5 'your':8
                                   'search_artist'  'prince':1
                                  'search_release'  '2':8,9 'disk':6,7 'o':2,3 'sign':1 'the':4 'times':5
                                     'search_rest'  'country':4 'exotica':2 'funk':6 'jazz':1 'o':5 'oldies':3 'or':7 'pop':9 'soul':8
                                    'search_combo'  '2':18C,19C 'could':2A 'country':23 'disk':16C,17C 'exotica':21 'funk':25 'i':1A 'jazz':20 'man':9A 'never':3A 'o':12C,13C,24 'of':7A 'oldies':22 'or':26 'place':6A 'pop':28 'prince':10B 'sign':11C 'soul':27 'take':4A 'the':5A,14C 'times':15C 'your':8A
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['80s', 'rock', 'pop', 'funk']
                                        'tag_date'  1987
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620531345.144269  (2021-05-09 05:35:45)
                             'size'  8230784