======================== unified (from filesystem) ========================
                                         'bitrate'  '223.436'
                                        'duration'  '91'
                                          'artist'  'Bell Labs'
                                     'text_people'  ''
                                         'release'  'Music from Mathematics'
                                           'title'  'Pitch Variations'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                     'discogstags'  "['idm', 'electronic', 'ambient']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '11'
                                            'date'  '1961'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '139.6'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunes_CDDB_1:eng'                            '8905380B+100393+11+150+9163+17421+23615+30500+43543+51096+62879+74982+85211+96713'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '4'
'TALB' (Album/Movie/Show title)                     'Music from Mathematics'
'TBPM' (BPM (beats per minute))                     '139.6'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '1961'
'TENC' (Encoded by)                                 'iTunes X v2.0.4'
'TIT2' (Title/songname/content description)         'Pitch Variations'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Moog Spaceport Lounge'
'TPE2' (Band/orchestra/accompaniment)               'Bell Labs'
'TRCK' (Track number/Position in set)               '4/11'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['idm', 'electronic', 'ambient']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.28 dB'
'TXXX:replaygain_track_peak'                        '0.559367'

========================== row from database ==========================
                                              'id'  682484
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/vol 2/12 bell labs - pitchvar.mp3
                                         'working'  None
                                         'bitrate'  223
                                    'duration_sec'  91
                                           'genre'  electronic-unsorted
                                        'filesize'  2568482
                                           'mtime'  1647277903
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm vol 2 12 bell labs pitchvar electronic unsorted
                                      'tag_artist'  Bell Labs
                                     'tag_release'  Music from Mathematics
                                       'tag_title'  Pitch Variations
                                             'bpm'  139.6
                                    'search_title'  'pitch':1 'variations':2
                                   'search_artist'  'bell':1 'labs':2
                                  'search_release'  'from':2 'mathematics':3 'music':1
                                     'search_rest'  '2':2 'bell':3 'electronic':6 'labs':4 'pitchvar':5 'unsorted':7 'vol':1
                                    'search_combo'  '2':9 'bell':3B,10 'electronic':13 'from':6C 'labs':4B,11 'mathematics':7C 'music':5C 'pitch':1A 'pitchvar':12 'unsorted':14 'variations':2A 'vol':8
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  []
                                        'tag_date'  1961
                                     'discogstags'  ['idm', 'electronic', 'ambient']

============================== file details ==============================
                                           'mtime'  1647277903.1972828  (2022-03-14 18:11:43)
                             'size'  2568482