======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '172'
                                          'artist'  'Leslie Keith'
                                     'text_people'  ''
                                         'release'  'Black Mountain Blues'
                                           'title'  'Where The Oid Red River Flows'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-OLDST-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['the name game', 'old time', 'bluegrass', 'fiddle', 'fill in the blank "
 "blues']")
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '1974'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country-bluegrass'
                                             'bpm'  '144.335'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Black Mountain Blues'
'TBPM' (BPM (beats per minute))                     '144.335'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country-bluegrass'
'TDRC' (Recording time)                             '1974'
'TIT2' (Title/songname/content description)         'Where The Oid Red River Flows'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Leslie Keith'
'TPE2' (Band/orchestra/accompaniment)               'Leslie Keith'
'TRCK' (Track number/Position in set)               '13'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['the name game', 'old time', 'bluegrass', 'fiddle', 'fill in the blank blues']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.78 dB'
'TXXX:replaygain_track_peak'                        '0.542859'

========================== row from database ==========================
                                              'id'  836536
                                            'path'  /data/Music/Bulk/00localcharacter/1974 - Black Mountain Blues/Leslie Keith - Black Mountain Blues - 13 - Where The Old Red River.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  172
                                           'genre'  loc-namerica-country-bluegrass
                                        'filesize'  6893465
                                           'mtime'  1621629606
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 1974 13 Old loc namerica country bluegrass
                                      'tag_artist'  Leslie Keith
                                     'tag_release'  Black Mountain Blues
                                       'tag_title'  Where The Oid Red River Flows
                                             'bpm'  144.335
                                    'search_title'  'flows':6 'oid':3 'red':4 'river':5 'the':2 'where':1
                                   'search_artist'  'keith':2 'leslie':1
                                  'search_release'  'black':1 'blues':3 'mountain':2
                                     'search_rest'  '1974':1 'bluegrass':6 'country':5 'loc':3 'namerica':4 'old':2
                                    'search_combo'  '1974':12 'black':9C 'bluegrass':17 'blues':11C 'country':16 'flows':6A 'keith':8B 'leslie':7B 'loc':14 'mountain':10C 'namerica':15 'oid':3A 'old':13 'red':4A 'river':5A 'the':2A 'where':1A
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['the name game', 'old time', 'bluegrass', 'fiddle', 'fill in the blank blues']
                                        'tag_date'  1974
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621629605.7567384  (2021-05-21 22:40:05)
                             'size'  6893465