======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '231'
                                          'artist'  'Red Sovine'
                                     'text_people'  ''
                                         'release'  '20 All-Time Greatest Hits'
                                           'title'  'Little Rosa'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['classic country', 'spoken word', 'country', 'honky tonk', 'country and "
 "western', 'rockabilly']")
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '20'
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '135.004'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20 All-Time Greatest Hits'
'TBPM' (BPM (beats per minute))                     '135.004'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'Little Rosa'
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '231235'
'TPE1' (Lead performer(s)/Soloist(s))               'Red Sovine'
'TRCK' (Track number/Position in set)               '9/20'
'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'                                   ['classic country',
 'spoken word',
 'country',
 'honky tonk',
 'country and western',
 'rockabilly']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.01 dB'
'TXXX:replaygain_track_peak'                        '0.593659'

========================== row from database ==========================
                                              'id'  959978
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/20 All-Time Greatest Hits/09 Little Rosa.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  231
                                           'genre'  loc-namerica-country
                                        'filesize'  9259677
                                           'mtime'  1621627921
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 09 loc namerica country
                                      'tag_artist'  Red Sovine
                                     'tag_release'  20 All-Time Greatest Hits
                                       'tag_title'  Little Rosa
                                             'bpm'  135.004
                                    'search_title'  'little':1 'rosa':2
                                   'search_artist'  'red':1 'sovine':2
                                  'search_release'  '20':1 'all':2 'alltime':4 'greatest':5 'hits':6 'time':3
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'loc':5 'namerica':6 'oldies':3
                                    'search_combo'  '20':5C 'all':6C 'alltime':8C 'country':14 'exotica':12 'greatest':9C 'hits':10C 'jazz':11 'little':1A 'loc':15 'namerica':16 'oldies':13 'red':3B 'rosa':2A 'sovine':4B 'time':7C
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  6B
                                           '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-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['classic country', 'spoken word', 'country', 'honky tonk', 'country and western', 'rockabilly']
                                        'tag_date'  1956
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621627921.10862  (2021-05-21 22:12:01)
                             'size'  9259677