======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '371'
                                          'artist'  'The 101-Strings Orchestra'
                                     'text_people'  ''
                                         'release'  'Moonlight serenades'
                                           'title'  'Moonlight sonata'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-UNU-1', 'Q-SYN-1', 'Q-BUSY-3', 'Q-GRIT-1', 'q-bass-1', 'q-play-2', "
 "'Q-CHART-2', 'q-drums-1', 'q-other-4', 'q-piano-3', 'q-vocals-1', "
 "'Q-MIXBEAT-1']")
                                      'lastfmtags'  "['instrumental', 'easy listening', 'classical', 'edhits', 'myhits']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-easy listening'
                                             'bpm'  '141.7'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Moonlight serenades'
'TBPM' (BPM (beats per minute))                     '141.7'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-easy listening'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         'Moonlight sonata'
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'The 101-Strings Orchestra'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'easy listening', 'classical', 'edhits', 'myhits']
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '3'
'TXXX:q-play'                                       '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.88 dB'
'TXXX:replaygain_track_peak'                        '0.786353'

========================== row from database ==========================
                                              'id'  1479467
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/The 101 Strings Orchestra/1993 - Moonlight Serenades/07 - Moonlight Sonata.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  371
                                           'genre'  electronic-generic or radio-easy listening
                                        'filesize'  14876128
                                           'mtime'  1621705551
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 1993 Serenades 07 Sonata electronic generic or radio easy listening
                                      'tag_artist'  The 101-Strings Orchestra
                                     'tag_release'  Moonlight serenades
                                       'tag_title'  Moonlight sonata
                                             'bpm'  141.7
                                    'search_title'  'moonlight':1 'sonata':2
                                   'search_artist'  '101':2 '101strings':4 'orchestra':5 'strings':3 'the':1
                                  'search_release'  'moonlight':1 'serenades':2
                                     'search_rest'  '1993':5 'country':4 'easy':12 'electronic':8 'exotica':2 'generic':9 'jazz':1 'listening':13 'oldies':3 'or':10 'radio':11 'serenades':6 'sonata':7
                                    'search_combo'  '101':4B '101strings':6B '1993':14 'country':13 'easy':21 'electronic':17 'exotica':11 'generic':18 'jazz':10 'listening':22 'moonlight':1A,8C 'oldies':12 'or':19 'orchestra':7B 'radio':20 'serenades':9C,15 'sonata':2A,16 'strings':5B 'the':3B
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-3', 'Q-MIXBEAT-1', 'q-play-2', 'Q-OLDST-3', 'Q-GRIT-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-1', 'Q-SYN-1', 'q-other-4', 'Q-BUSY-3', 'Q-HAP-3', 'q-bass-1']
                                      'lastfmtags'  ['instrumental', 'easy listening', 'classical', 'edhits', 'myhits']
                                        'tag_date'  1993
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705551.1607225  (2021-05-22 19:45:51)
                             'size'  14876128