======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '192'
                                          'artist'  'Robert Schumann'
                                     'text_people'  ''
                                         'release'  'Romantic Piano Music Vol 1'
                                           'title'  'Warum? op. 12 No. 3'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
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 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['german', 'composers', 'piano', 'romantic', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '16'
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '108.471'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Romantic Piano Music Vol 1'
'TBPM' (BPM (beats per minute))                     '108.471'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         'Warum? op. 12 No. 3'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Robert Schumann'
'TRCK' (Track number/Position in set)               '6/16'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.83.01, LAME dll 3.97, 256 Kbit/s, Joint Stereo, Normal quality'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['german', 'composers', 'piano', 'romantic', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'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'                        '+3.32 dB'
'TXXX:replaygain_track_peak'                        '0.824741'

========================== row from database ==========================
                                              'id'  376056
                                            'path'  /data/Music/Bulk/00instruments-classical/Robert Schumann/Romantic Piano Music Vol 1/06 Warum_ op. 12 No. 3.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  192
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  6148076
                                           'mtime'  1620574219
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 06 Warum_ prerock classical or classical instruments
                                      'tag_artist'  Robert Schumann
                                     'tag_release'  Romantic Piano Music Vol 1
                                       'tag_title'  Warum? op. 12 No. 3
                                             'bpm'  108.471
                                    'search_title'  '3':6 'no':4,5 'op':2,3 'warum':1
                                   'search_artist'  'robert':1 'schumann':2
                                  'search_release'  '1':5 'music':3 'piano':2 'romantic':1 'vol':4
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':6 'or':5 'prerock':4 'warum':3
                                    'search_combo'  '00instruments':14 '1':13C '3':6A 'classical':15 'instruments':19 'music':11C 'no':4A,5A 'op':2A,3A 'or':18 'piano':10C 'prerock':17 'robert':7B 'romantic':9C 'schumann':8B 'vol':12C 'warum':1A,16
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', '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-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['german', 'composers', 'piano', 'romantic', 'classical']
                                        'tag_date'  1992
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574218.7097888  (2021-05-09 17:30:18)
                             'size'  6148076