======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '316'
                                          'artist'  'Claude Debussy'
                                     'text_people'  ''
                                         'release'  'Klavierwerke'
                                           'title'  'Clair de lune'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-2', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['impressionist', 'composers', 'piano', 'french', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '143.721'
                                             'key'  '3B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Klavierwerke'
'TBPM' (BPM (beats per minute))                     '143.721'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Clair de lune'
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               'Claude Debussy'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['impressionist', 'composers', 'piano', 'french', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.34 dB'
'TXXX:replaygain_track_peak'                        '0.871612'

========================== row from database ==========================
                                              'id'  1348032
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Claude Debussy__MBZ;#Claude Debussy;#Klavierwerke;#03;#Clair de lune.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  316
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  7585370
                                           'mtime'  1621630227
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Debussy__MBZ;#Claude Debussy;#Klavierwerke;#03;#Clair prerock classical or classical instruments
                                      'tag_artist'  Claude Debussy
                                     'tag_release'  Klavierwerke
                                       'tag_title'  Clair de lune
                                             'bpm'  143.721
                                    'search_title'  'clair':1 'de':2 'lune':3
                                   'search_artist'  'claude':1 'debussy':2
                                  'search_release'  'klavierwerke':1
                                     'search_rest'  '00poprockelectronic':1 '03':15,19 'clair':16,20 'classical':22 'claude':9,12 'debussy':7,10,13,17 'files':5,6 'instruments':24 'klavierwerke':14,18 'loose':3,4 'mbz':8,11 'or':23 'prerock':21 'unsorted':2
                                    'search_combo'  '00poprockelectronic':7 '03':21,25 'clair':1A,22,26 'classical':28 'claude':4B,15,18 'de':2A 'debussy':5B,13,16,19,23 'files':11,12 'instruments':30 'klavierwerke':6C,20,24 'loose':9,10 'lune':3A 'mbz':14,17 'or':29 'prerock':27 'unsorted':8
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['impressionist', 'composers', 'piano', 'french', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621630226.8290136  (2021-05-21 22:50:26)
                             'size'  7585370