======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '188'
                                          'artist'  'Pia Beck'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Pia's Boogie (piano solo)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-3', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-3', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['netherlands', 'female vocalist', 'jazz', 'piano', 'dutch']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1950'
                                        'comments'  ''
                                           'genre'  'prerock-instrumental'
                                             'bpm'  '87.294'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '87.294'
'TCON' (Content type, a.k.a. Genre)                 'prerock-instrumental'
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         "Pia's Boogie (piano solo)"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Pia Beck'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['netherlands', 'female vocalist', 'jazz', 'piano', 'dutch']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.79 dB'
'TXXX:replaygain_track_peak'                        '0.566678'

========================== row from database ==========================
                                              'id'  1510603
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1950/Pia Beck - Pia_s Boogie (piano solo) 28-9-1950.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  188
                                           'genre'  prerock-instrumental
                                        'filesize'  3776177
                                           'mtime'  1621705407
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1950 Pia_s 28 9 1950 prerock instrumental
                                      'tag_artist'  Pia Beck
                                     'tag_release'  None
                                       'tag_title'  Pia's Boogie (piano solo)
                                             'bpm'  87.294
                                    'search_title'  'boogie':4 'pia':1 'piano':5,6 'pias':3 's':2 'solo':7,8
                                   'search_artist'  'beck':2 'pia':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1950':6 '28':9 '9':10 'country':4 'exotica':2 'instrumental':12 'jazz':1 'oldies':3 'pia':7 'prerock':11 's':8
                                    'search_combo'  '00oldiepop':15 '1950':16 '28':19 '9':20 'beck':10B 'boogie':4A 'country':14 'exotica':12 'instrumental':22 'jazz':11 'oldies':13 'pia':1A,9B,17 'piano':5A,6A 'pias':3A 'prerock':21 's':2A,18 'solo':7A,8A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['netherlands', 'female vocalist', 'jazz', 'piano', 'dutch']
                                        'tag_date'  1950
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1621705406.8308187  (2021-05-22 19:43:26)
                             'size'  3776177