======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '153'
                                          'artist'  'Hot Butter'
                                     'text_people'  ''
                                         'release'  'Number 1 Hits CD2'
                                           'title'  'Popcorn'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-UNU-1', "
 "'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-3']")
                                      'lastfmtags'  "['instrumental', '70s', 'electronic', 'pop', 'synthpop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance;set-pl-billboard'
                                             'bpm'  '134.466'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Number 1 Hits CD2'
'TBPM' (BPM (beats per minute))                     '134.466'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-dance', 'set-pl-billboard']
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         'Popcorn'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Hot Butter'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Mp3gain_minmax'                               '120,208'
'TXXX:Mp3gain_undo'                                 '+002,+002,N'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:Tracknum'                                     '14'
'TXXX:lastfmtags'                                   ['instrumental', '70s', 'electronic', 'pop', 'synthpop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.22 dB'
'TXXX:replaygain_track_peak'                        '0.691805'

========================== row from database ==========================
                                              'id'  1407252
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/Number 1 hits cd 2/14 Hot Butter - Popcorn.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  153
                                           'genre'  electronic-generic or radio-dance;set-pl-billboard
                                        'filesize'  3683539
                                           'mtime'  1620384727
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat hits cd 14 electronic generic radio dance;set pl billboard
                                      'tag_artist'  Hot Butter
                                     'tag_release'  Number 1 Hits CD2
                                       'tag_title'  Popcorn
                                             'bpm'  134.466
                                    'search_title'  'popcorn':1
                                   'search_artist'  'butter':2 'hot':1
                                  'search_release'  '1':2 'cd2':4 'hits':3 'number':1
                                     'search_rest'  '00poprockelectronic':1 'billboard':14 'cd':6 'dance':3,9,11 'electronic':7 'generic':2 'hits':5 'pl':13 'radio':8 'set':10,12 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':8 '1':5C 'billboard':21 'butter':3B 'cd':13 'cd2':7C 'dance':10,16,18 'electronic':14 'generic':9 'hits':6C,12 'hot':2B 'number':4C 'pl':20 'popcorn':1A 'radio':15 'set':17,19 'trapbeat':11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', '70s', 'electronic', 'pop', 'synthpop']
                                        'tag_date'  1975
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620384726.5221825  (2021-05-07 12:52:06)
                             'size'  3683539