======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '155'
                                          'artist'  'Tennessee Ernie Ford'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'Sixteen Tons'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', "
 "'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'americana', '50s', 'oldies', 'classic country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1955'
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '145.267'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '145.267'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1955'
'TIT2' (Title/songname/content description)         'Sixteen Tons'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tennessee Ernie Ford'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'americana', '50s', 'oldies', 'classic country']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.01 dB'
'TXXX:replaygain_track_peak'                        '0.847411'

========================== row from database ==========================
                                              'id'  948949
                                            'path'  /data/Music/Bulk/sns/Tennessee Ernie Ford - Sixteen Tons.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  155
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  4973148
                                           'mtime'  1620357099
                                   'redo_metaread'  0
                                        'rest_str'   sns set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Tennessee Ernie Ford
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  Sixteen Tons
                                             'bpm'  145.267
                                    'search_title'  'sixteen':1 'tons':2
                                   'search_artist'  'ernie':2 'ford':3 'tennessee':1
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  'mor':8 'pl':3 'set':2,5,7 'shirleyspinoza':4,6 'sns':1
                                    'search_combo'  'ernie':4B 'ford':5B 'mor':15 'pl':10 'set':9,12,14 'shirley':6C 'shirleyspinoza':11,13 'sixteen':1A 'sns':8 'spinoza':7C 'tennessee':3B 'tons':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['country', 'americana', '50s', 'oldies', 'classic country']
                                        'tag_date'  1955
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620357098.6281164  (2021-05-07 05:11:38)
                             'size'  4973148