======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '238'
                                          'artist'  'Granados'
                                     'text_people'  ''
                                         'release'  'Romantic Piano Music (Disk 2)'
                                           'title'  'Danzas Espagnolas - Oriental'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-3', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-2', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'spanish', 'romantic', 'piano', 'classical guitar']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  '21'
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '139.9'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Romantic Piano Music (Disk 2)'
'TBPM' (BPM (beats per minute))                     '139.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         'Danzas Espagnolas - Oriental'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Granados'
'TRCK' (Track number/Position in set)               '17/21'
'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'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classical', 'spanish', 'romantic', 'piano', 'classical guitar']
'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'                                      '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.76 dB'
'TXXX:replaygain_track_peak'                        '0.692888'

========================== row from database ==========================
                                              'id'  387300
                                            'path'  /data/Music/Bulk/00instruments-classical/Granados/Romantic Piano Music (Disk 2)/17 Danzas Espagnolas - Oriental.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  238
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  7620187
                                           'mtime'  1620574182
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 17 prerock classical or classical instruments
                                      'tag_artist'  Granados
                                     'tag_release'  Romantic Piano Music (Disk 2)
                                       'tag_title'  Danzas Espagnolas - Oriental
                                             'bpm'  139.9
                                    'search_title'  'danzas':1 'espagnolas':2 'oriental':3
                                   'search_artist'  'granados':1
                                  'search_release'  '2':6,7 'disk':4,5 'music':3 'piano':2 'romantic':1
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':5 'or':4 'prerock':3
                                    'search_combo'  '00instruments':12 '2':10C,11C 'classical':13 'danzas':1A 'disk':8C,9C 'espagnolas':2A 'granados':4B 'instruments':16 'music':7C 'or':15 'oriental':3A 'piano':6C 'prerock':14 'romantic':5C
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', '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-2', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'spanish', 'romantic', 'piano', 'classical guitar']
                                        'tag_date'  1993
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574182.232146  (2021-05-09 17:29:42)
                             'size'  7620187