======================== unified (from filesystem) ========================
                                         'bitrate'  '245.955'
                                        'duration'  '95'
                                          'artist'  'Suite In D (Ed'
                                     'text_people'  ''
                                         'release'  'Complete Harpsicord Music'
                                           'title'  '42 Suite In D (Ed'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
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 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '42'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments;mi-harpsicord'
                                             'bpm'  '106.2'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Complete Harpsicord Music'
'TBPM' (BPM (beats per minute))                     '106.2'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-classical or classical instruments', 'mi-harpsicord']
'TIT2' (Title/songname/content description)         '42 Suite In D (Ed'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Suite In D (Ed'
'TRCK' (Track number/Position in set)               '42'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'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'                        '-0.92 dB'
'TXXX:replaygain_track_peak'                        '0.688522'

========================== row from database ==========================
                                              'id'  352343
                                            'path'  /data/Music/Bulk/00instruments-classical/Harpsichord/42 Suite In D (Ed.mp3
                                         'working'  None
                                         'bitrate'  246
                                    'duration_sec'  95
                                           'genre'  prerock-classical or classical instruments;mi-harpsicord
                                        'filesize'  2942764
                                           'mtime'  1620528045
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Harpsichord prerock classical classical instruments;mi harpsicord
                                      'tag_artist'  Suite In D (Ed
                                     'tag_release'  Complete Harpsicord Music
                                       'tag_title'  42 Suite In D (Ed
                                             'bpm'  106.2
                                    'search_title'  '42':1 'd':4 'ed':5,6 'in':3 'suite':2
                                   'search_artist'  'd':3 'ed':4,5 'in':2 'suite':1
                                  'search_release'  'complete':1 'harpsicord':2 'music':3
                                     'search_rest'  '00instruments':1 'classical':2 'harpsichord':3 'harpsicord':9 'instruments':5,7 'mi':6,8 'prerock':4
                                    'search_combo'  '00instruments':15 '42':1A 'classical':16 'complete':12C 'd':4A,9B 'ed':5A,6A,10B,11B 'harpsichord':17 'harpsicord':13C,23 'in':3A,8B 'instruments':19,21 'mi':20,22 'music':14C 'prerock':18 'suite':2A,7B
                                    'tag_tracknum'  42
                                      '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-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528044.9553304  (2021-05-09 04:40:44)
                             'size'  2942764