======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '217'
                                          'artist'  'Charles Harrison'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  "I'm Always Chasing Rainbows"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['all', 'schellack schatz', '1890 1920', 'wartime']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1918'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '130.734'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '130.734'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1918'
'TIT2' (Title/songname/content description)         "I'm Always Chasing Rainbows"
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Charles Harrison'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['all', 'schellack schatz', '1890 1920', 'wartime']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'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'                        '+1.66 dB'
'TXXX:replaygain_track_peak'                        '0.556182'

========================== row from database ==========================
                                              'id'  1504701
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1918/Charles Harrison - I_m Always Chasing Rainbows 26-7-1918.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  217
                                           'genre'  prerock-vocal
                                        'filesize'  4353849
                                           'mtime'  1620666284
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1918 I_m 26 7 1918 prerock vocal
                                      'tag_artist'  Charles Harrison
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  I'm Always Chasing Rainbows
                                             'bpm'  130.734
                                    'search_title'  'always':4 'chasing':5 'i':1 'im':3 'm':2 'rainbows':6
                                   'search_artist'  'charles':1 'harrison':2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1918':6 '26':9 '7':10 'country':4 'exotica':2 'i':7 'jazz':1 'm':8 'oldies':3 'prerock':11 'vocal':12
                                    'search_combo'  '00oldiepop':18 '1918':19 '26':22 '7':23 'album':10C 'always':4A 'charles':7B 'chasing':5A 'country':17 'exotica':15 'harrison':8B 'i':1A,20 'im':3A 'jazz':14 'm':2A,21 'non':9C 'nonalbum':11C 'oldies':16 'prerock':24 'rainbows':6A 'tracks':12C,13C 'vocal':25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['all', 'schellack schatz', '1890 1920', 'wartime']
                                        'tag_date'  1918
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1620666283.6723988  (2021-05-10 19:04:43)
                             'size'  4353849