======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '288'
                                          'artist'  'Edgar Winter Group'
                                     'text_people'  ''
                                         'release'  'Easy Instr 70s'
                                           'title'  "Frankenstein (BB#1(1), CN#1, UK#18, Beaumont, TX, US '73)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classic rock', 'blues rock', 'rock', '70s', 'progressive rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '95.8'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Easy Instr 70s'
'TBPM' (BPM (beats per minute))                     '95.8'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         "Frankenstein (BB#1(1), CN#1, UK#18, Beaumont, TX, US '73)"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Edgar Winter Group'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic rock', 'blues rock', 'rock', '70s', 'progressive rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'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'                        '+1.14 dB'
'TXXX:replaygain_track_peak'                        '0.685395'

========================== row from database ==========================
                                              'id'  1533622
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/EASY Instr 70_s/Edgar Winter Group - Frankenstein (BB#1(1), CN#1, UK#18, Beaumont, TX, US _73).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  288
                                           'genre'  funk or soul
                                        'filesize'  6930737
                                           'mtime'  1628357819
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul EASY 70_s _73) funk or soul
                                      'tag_artist'  Edgar Winter Group
                                     'tag_release'  Easy Instr 70s
                                       'tag_title'  Frankenstein (BB#1(1), CN#1, UK#18, Beaumont, TX, US '73)
                                             'bpm'  95.8
                                    'search_title'  '1':3,4,8,10 '11':6 '18':12,14 '73':20,21 'bb':2,5 'beaumont':15,16 'cn':7,9 'frankenstein':1 'tx':17,18 'uk':11,13 'us':19
                                   'search_artist'  'edgar':1 'group':3 'winter':2
                                  'search_release'  '70s':3 'easy':1 'instr':2
                                     'search_rest'  '70':5 '73':7,8 'easy':4 'funk':2 'or':9 's':6 'soul':3 'swing':1
                                    'search_combo'  '1':3A,4A,8A,10A '11':6A '18':12A,14A '70':32 '70s':27C '73':20A,21A,34,35 'bb':2A,5A 'beaumont':15A,16A 'cn':7A,9A 'easy':25C,31 'edgar':22B 'frankenstein':1A 'funk':29 'group':24B 'instr':26C 'or':36 's':33 'soul':30 'swing':28 'tx':17A,18A 'uk':11A,13A 'us':19A 'winter':23B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['classic rock', 'blues rock', 'rock', '70s', 'progressive rock']
                                        'tag_date'  1975
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357818.8120306  (2021-08-07 19:36:58)
                             'size'  6930737