======================== unified (from filesystem) ========================
                                         'bitrate'  '131.682'
                                        'duration'  '167'
                                          'artist'  'BLIND  BLAKE'
                                     'text_people'  ''
                                         'release'  'Old Country Music'
                                           'title'  'POLICE  DOG  BLUES'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'ragtime', 'delta blues', 'piedmont blues', 'guitar']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '125.704'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Old Country Music'
'TBPM' (BPM (beats per minute))                     '125.704'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'POLICE  DOG  BLUES'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'BLIND  BLAKE'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['blues', 'ragtime', 'delta blues', 'piedmont blues', 'guitar']
'TXXX:q-bass'                                       '1'
'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-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.54 dB'
'TXXX:replaygain_track_peak'                        '0.420422'

========================== row from database ==========================
                                              'id'  966568
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Blind Blake - Police Dog Blues 1929.wma.mp3
                                         'working'  None
                                         'bitrate'  131
                                    'duration_sec'  167
                                           'genre'  loc-namerica-country
                                        'filesize'  2763727
                                           'mtime'  1621628015
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Blind Blake Police Dog Blues 1929.wma loc namerica country
                                      'tag_artist'  BLIND  BLAKE
                                     'tag_release'  Old Country Music
                                       'tag_title'  POLICE  DOG  BLUES
                                             'bpm'  125.704
                                    'search_title'  'blues':3 'dog':2 'police':1
                                   'search_artist'  'blake':2 'blind':1
                                  'search_release'  'country':2 'music':3 'old':1
                                     'search_rest'  '1929':10 '1929wma':12 'blake':6 'blind':5 'blues':9 'country':4 'dog':8 'exotica':2 'jazz':1 'loc':13 'namerica':14 'oldies':3 'police':7 'wma':11
                                    'search_combo'  '1929':18 '1929wma':20 'blake':5B,14 'blind':4B,13 'blues':3A,17 'country':7C,12 'dog':2A,16 'exotica':10 'jazz':9 'loc':21 'music':8C 'namerica':22 'old':6C 'oldies':11 'police':1A,15 'wma':19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'ragtime', 'delta blues', 'piedmont blues', 'guitar']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628014.9547887  (2021-05-21 22:13:34)
                             'size'  2763727