======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '156'
                                          'artist'  'Black Rebel Motorcycle Club'
                                     'text_people'  ''
                                         'release'  'My CD'
                                           'title'  "Ain't No Easy Way"
                                           'quals'  ("['Q-HAP-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['indie', 'alternative rock', 'alternative', 'indie rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'eid-unsorted'
                                             'bpm'  '95.7'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'My CD'
'TBPM' (BPM (beats per minute))                     '95.7'
'TCON' (Content type, a.k.a. Genre)                 'eid-unsorted'
'TIT2' (Title/songname/content description)         "Ain't No Easy Way"
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Black Rebel Motorcycle Club'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['indie', 'alternative rock', 'alternative', 'indie rock', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.07 dB'
'TXXX:replaygain_track_peak'                        '0.413737'

========================== row from database ==========================
                                              'id'  1518998
                                            'path'  /data/Music/Bulk/00poprockelectronic/ff3/02 - Black Rebel Motorcycle Club - Ain_t No Easy Way.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  156
                                           'genre'  eid-unsorted
                                        'filesize'  3767629
                                           'mtime'  1620521535
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic ff3 02 Ain_t eid unsorted
                                      'tag_artist'  Black Rebel Motorcycle Club
                                     'tag_release'  My CD
                                       'tag_title'  Ain't No Easy Way
                                             'bpm'  95.7
                                    'search_title'  'ain':1 'aint':3 'easy':5 'no':4 't':2 'way':6
                                   'search_artist'  'black':1 'club':4 'motorcycle':3 'rebel':2
                                  'search_release'  'cd':2 'my':1
                                     'search_rest'  '00poprockelectronic':1 'ain':3 'eid':5 'ff3':2 't':4 'unsorted':6
                                    'search_combo'  '00poprockelectronic':13 'ain':1A,15 'aint':3A 'black':7B 'cd':12C 'club':10B 'easy':5A 'eid':17 'ff3':14 'motorcycle':9B 'my':11C 'no':4A 'rebel':8B 't':2A,16 'unsorted':18 'way':6A
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['indie', 'alternative rock', 'alternative', 'indie rock', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620521535.465881  (2021-05-09 02:52:15)
                             'size'  3767629