======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '169'
                                          'artist'  "''Tennessee'' Ernie Ford"
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  "That's All"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'classic country', '50s', 'oldies', 'americana']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '134'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-country'
                                             'bpm'  '102.333'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '102.333'
'TCON' (Content type, a.k.a. Genre)                 'prerock-country'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "That's All"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               "''Tennessee'' Ernie Ford"
'TRCK' (Track number/Position in set)               '134'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'classic country', '50s', 'oldies', 'americana']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'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'                        '+1.55 dB'
'TXXX:replaygain_track_peak'                        '0.800489'

========================== row from database ==========================
                                              'id'  1517781
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-134 - __Tennessee__ Ernie Ford - That_s All.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  169
                                           'genre'  prerock-country
                                        'filesize'  6772736
                                           'mtime'  1621627889
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 134 __Tennessee__ That_s prerock country
                                      'tag_artist'  ''Tennessee'' Ernie Ford
                                     'tag_release'  Greatest Hits
                                       'tag_title'  That's All
                                             'bpm'  102.333
                                    'search_title'  'all':4 's':2 'that':1 'thats':3
                                   'search_artist'  'ernie':3 'ford':4 'tennessee':1,2
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00oldiepop':5 '134':7 '1956':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':11 's':10 'tennessee':8 'that':9
                                    'search_combo'  '00oldiepop':15 '134':17 '1956':16 'all':4A 'country':14 'ernie':7B 'exotica':12 'ford':8B 'greatest':9C 'hits':10C 'jazz':11 'oldies':13 'prerock':21 's':2A,20 'tennessee':5B,6B,18 'that':1A,19 'thats':3A
                                    'tag_tracknum'  134
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['country', 'classic country', '50s', 'oldies', 'americana']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627888.643049  (2021-05-21 22:11:28)
                             'size'  6772736