======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '161'
                                          'artist'  'Harry Roy'
                                     'text_people'  ''
                                         'release'  'Parlophone F  388'
                                           'title'  'Piano Madness (pno duet Stanley Black & Norman Yarlett)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'big band', 'british', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '111.824'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Parlophone F  388'
'TBPM' (BPM (beats per minute))                     '111.824'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1936'
'TIT2' (Title/songname/content description)         'Piano Madness (pno duet Stanley Black & Norman Yarlett)'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Harry Roy'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', 'big band', 'british', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.00 dB'
'TXXX:replaygain_track_peak'                        '0.549908'

========================== row from database ==========================
                                              'id'  1433252
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1936/Harry Roy - Piano Madness (pno duet Stanley Black & Norman Yarlett) 15-1-1936.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  161
                                           'genre'  prerock-band
                                        'filesize'  3233586
                                           'mtime'  1620560462
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1936 15 1 1936 prerock band
                                      'tag_artist'  Harry Roy
                                     'tag_release'  Parlophone F  388
                                       'tag_title'  Piano Madness (pno duet Stanley Black & Norman Yarlett)
                                             'bpm'  111.824
                                    'search_title'  'black':7 'duet':5 'madness':2 'norman':8 'piano':1 'pno':3,4 'stanley':6 'yarlett':9,10
                                   'search_artist'  'harry':1 'roy':2
                                  'search_release'  '388':3 'f':2 'parlophone':1
                                     'search_rest'  '00oldiepop':5 '1':7 '1936':6 'band':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':20 '1':22 '1936':21 '388':15C 'band':24 'black':7A 'country':19 'duet':5A 'exotica':17 'f':14C 'harry':11B 'jazz':16 'madness':2A 'norman':8A 'oldies':18 'parlophone':13C 'piano':1A 'pno':3A,4A 'prerock':23 'roy':12B 'stanley':6A 'yarlett':9A,10A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'big band', 'british', 'swing']
                                        'tag_date'  1936
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560461.5664673  (2021-05-09 13:41:01)
                             'size'  3233586