======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '54'
                                          'artist'  'Indigo Swing'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Choo Choo Ch'Boogie"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-2', 'q-other-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'neo swing', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing'
                                             'bpm'  '98.741'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '98.741'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soft-swing'
'TIT2' (Title/songname/content description)         "Choo Choo Ch'Boogie"
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Indigo Swing'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'neo swing', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.87 dB'
'TXXX:replaygain_track_peak'                        '0.717267'

========================== row from database ==========================
                                              'id'  1509511
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Indigo Swing/40_s Jazz Big Band- Indigo Swing - Choo Choo Ch_Boogie.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  54
                                           'genre'  prerock-jb-jazz-soft-swing
                                        'filesize'  872135
                                           'mtime'  1620530193
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 40_s Jazz Big Band Ch_Boogie prerock jb jazz soft swing
                                      'tag_artist'  Indigo Swing
                                     'tag_release'  None
                                       'tag_title'  Choo Choo Ch'Boogie
                                             'bpm'  98.741
                                    'search_title'  'boogie':3 'ch':2 'chboogie':4 'choo':1
                                   'search_artist'  'indigo':1 'swing':2
                                  'search_release'  
                                     'search_rest'  '40':5 'band':8 'big':7 'boogie':10 'ch':9 'country':4 'exotica':2 'jazz':1 'jb':12 'oldies':3 'prerock':11 's':6 'soft':13 'swing':14
                                    'search_combo'  '40':11 'band':14 'big':13 'boogie':3A,16 'ch':2A,15 'chboogie':4A 'choo':1A 'country':10 'exotica':8 'indigo':5B 'jazz':7 'jb':18 'oldies':9 'prerock':17 's':12 'soft':19 'swing':6B,20
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['big band', 'jazz', 'neo swing', 'swing']
                                        'tag_date'  
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620530193.215287  (2021-05-09 05:16:33)
                             'size'  872135