======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '165'
                                          'artist'  'Zach Swagger'
                                     'text_people'  ''
                                         'release'  'Homework #1½'
                                           'title'  'Empty Highways'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                     'discogstags'  "['industrial', 'electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'rock-gr-punk'
                                             'bpm'  '145.0'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Homework #1½'
'TBPM' (BPM (beats per minute))                     '145.0'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-punk'
'TDRC' (Recording time)                             '1980'
'TIT2' (Title/songname/content description)         'Empty Highways'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Zach Swagger'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['industrial', 'electronic', 'experimental']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.87 dB'
'TXXX:replaygain_track_peak'                        '0.700353'

========================== row from database ==========================
                                              'id'  717248
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/va - homework #1½ us experimental & artpunk 45s/04 - zach swagger - empty highways.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  165
                                           'genre'  rock-gr-punk
                                        'filesize'  2651625
                                           'mtime'  1622658900
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm va homework us experimental & artpunk 45s 04 zach swagger empty highways rock gr punk
                                      'tag_artist'  Zach Swagger
                                     'tag_release'  Homework #1½
                                       'tag_title'  Empty Highways
                                             'bpm'  145.0
                                    'search_title'  'empty':1 'highways':2
                                   'search_artist'  'swagger':2 'zach':1
                                  'search_release'  '1':2,3 '11':4,6 '2':5,7 'homework':1
                                     'search_rest'  '45s':6 'artpunk':5 'empty':9 'experimental':4 'gr':12 'highways':10 'homework':2 'punk':13 'rock':11 'swagger':8 'us':3 'va':1 'zach':7
                                    'search_combo'  '1':6C,7C '11':8C,10C '2':9C,11C '45s':17 'artpunk':16 'empty':1A,20 'experimental':15 'gr':23 'highways':2A,21 'homework':5C,13 'punk':24 'rock':22 'swagger':4B,19 'us':14 'va':12 'zach':3B,18
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  []
                                        'tag_date'  1980
                                     'discogstags'  ['industrial', 'electronic', 'experimental']

============================== file details ==============================
                                           'mtime'  1622658899.7468708  (2021-06-02 20:34:59)
                             'size'  2651625