======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '500'
                                          'artist'  'Otto Luening and Vladimir Ussachevsky'
                                     'text_people'  ''
                                         'release'  'Music for Electronic & Older Instruments'
                                           'title'  'Concerted Piece for Tape Recorder and Orchestra'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-2', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', "
 "'q-play-2', 'Q-OLDST-3', 'q-chart-1', 'q-drums-3', 'q-other-4', 'q-piano-1', "
 "'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  ("['contemporary classical', 'musique concrète', 'earwaves', 'avant-garde', "
 "'electronic']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1968'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '129.6'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Music for Electronic & Older Instruments'
'TBPM' (BPM (beats per minute))                     '129.6'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '1968'
'TIT2' (Title/songname/content description)         'Concerted Piece for Tape Recorder and Orchestra'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Otto Luening and Vladimir Ussachevsky'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['contemporary classical',
 'musique concrète',
 'earwaves',
 'avant-garde',
 'electronic']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.85 dB'
'TXXX:replaygain_track_peak'                        '0.740527'

========================== row from database ==========================
                                              'id'  1369565
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Mel Powell - music for electronic & older instruments (1968)/concerted piece for tape recorder and orchestra.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  500
                                           'genre'  electronic-unsorted
                                        'filesize'  20021205
                                           'mtime'  1620540158
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Mel Powell music electronic older instruments (1968) concerted piece tape recorder orchestra electronic unsorted
                                      'tag_artist'  Otto Luening and Vladimir Ussachevsky
                                     'tag_release'  Music for Electronic & Older Instruments
                                       'tag_title'  Concerted Piece for Tape Recorder and Orchestra
                                             'bpm'  129.6
                                    'search_title'  'and':6 'concerted':1 'for':3 'orchestra':7 'piece':2 'recorder':5 'tape':4
                                   'search_artist'  'and':3 'luening':2 'otto':1 'ussachevsky':5 'vladimir':4
                                  'search_release'  'electronic':3 'for':2 'instruments':5 'music':1 'older':4
                                     'search_rest'  '1968':7,8 'concerted':9 'electronic':4 'instruments':6 'mel':1 'music':3 'older':5 'orchestra':13 'piece':10 'powell':2 'recorder':12 'tape':11 'unsorted':14
                                    'search_combo'  '1968':24,25 'and':6A,10B 'concerted':1A,26 'electronic':15C,21 'for':3A,14C 'instruments':17C,23 'luening':9B 'mel':18 'music':13C,20 'older':16C,22 'orchestra':7A,30 'otto':8B 'piece':2A,27 'powell':19 'recorder':5A,29 'tape':4A,28 'unsorted':31 'ussachevsky':12B 'vladimir':11B
                                    'tag_tracknum'  None
                                      '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-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-4', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['contemporary classical', 'musique concrète', 'earwaves', 'avant-garde', 'electronic']
                                        'tag_date'  1968
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620540158.3619313  (2021-05-09 08:02:38)
                             'size'  20021205