======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '143'
                                          'artist'  'Red Sovine'
                                     'text_people'  ''
                                         'release'  'Red Sovine'
                                           'title'  'Farewell, So Long, Goodbye'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-2', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-1', 'q-other-3', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['classic country', 'spoken word', 'country', 'honky tonk', 'country and "
 "western', 'rockabilly']")
                                     'discogstags'  "['country', 'folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '08'
                                      'tracktotal'  '12'
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '86.585'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Red Sovine'
'TBPM' (BPM (beats per minute))                     '86.585'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TCOP' (Copyright message)                          "TJ's House Of Country Music"
'TDRC' (Recording time)                             '1956'
'TENC' (Encoded by)                                 'Tolomada Int.'
'TIT2' (Title/songname/content description)         'Farewell, So Long, Goodbye'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Red Sovine'
'TPE2' (Band/orchestra/accompaniment)               'Red Sovine'
'TPUB' (Publisher)                                  'MGM 3465'
'TRCK' (Track number/Position in set)               '08/12'
'TRSO' (Internet radio station owner)               'Tolomada Int.'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['country', 'folk, world, & country']
'TXXX:lastfmtags'                                   ['classic country',
 'spoken word',
 'country',
 'honky tonk',
 'country and western',
 'rockabilly']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.35 dB'
'TXXX:replaygain_track_peak'                        '0.498081'

========================== row from database ==========================
                                              'id'  959749
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/SOVINE,RED [1956]-Red Sovine [MGM]/SOVINE,RED-1956-Red Sovine-08.Farewell, So Long, Goodbye.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  143
                                           'genre'  loc-namerica-country
                                        'filesize'  4627373
                                           'mtime'  1621628375
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country SOVINE,RED [1956] [MGM] SOVINE,RED 1956 08.Farewell, loc namerica country
                                      'tag_artist'  Red Sovine
                                     'tag_release'  Red Sovine
                                       'tag_title'  Farewell, So Long, Goodbye
                                             'bpm'  86.585
                                    'search_title'  'farewell':1,2 'goodbye':6 'long':4,5 'so':3
                                   'search_artist'  'red':1 'sovine':2
                                  'search_release'  'red':1 'sovine':2
                                     'search_rest'  '08':13 '08farewell':15 '1956':9,10 'country':4 'exotica':2 'farewell':14 'jazz':1 'loc':16 'mgm':11,12 'namerica':17 'oldies':3 'red':6,8 'sovine':5,7
                                    'search_combo'  '08':23 '08farewell':25 '1956':19,20 'country':14 'exotica':12 'farewell':1A,2A,24 'goodbye':6A 'jazz':11 'loc':26 'long':4A,5A 'mgm':21,22 'namerica':27 'oldies':13 'red':7B,9C,16,18 'so':3A 'sovine':8B,10C,15,17
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['classic country', 'spoken word', 'country', 'honky tonk', 'country and western', 'rockabilly']
                                        'tag_date'  1956
                                     'discogstags'  ['country', 'folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621628374.961009  (2021-05-21 22:19:34)
                             'size'  4627373