======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '643'
                                          'artist'  'stars and stips'
                                     'text_people'  ''
                                         'release'  'Progsoup 37'
                                           'title'  'nevergreen'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'Q-PIANO-3', 'q-chart-2', 'q-drums-3', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '28'
                                      'tracktotal'  '7'
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '116.924'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Progsoup 37'
'TBPM' (BPM (beats per minute))                     '116.924'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         'nevergreen'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'stars and stips'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '28/7'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.28 dB'
'TXXX:replaygain_track_peak'                        '0.658038'

========================== row from database ==========================
                                              'id'  1416334
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/PROGSOUP/progsoup 37/2159 stars & stips - nevergreen.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  643
                                           'genre'  rock-cppex-progressive
                                        'filesize'  20585888
                                           'mtime'  1620737287
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy PROGSOUP progsoup 2159 & rock cppex progressive
                                      'tag_artist'  stars and stips
                                     'tag_release'  Progsoup 37
                                       'tag_title'  nevergreen
                                             'bpm'  116.924
                                    'search_title'  'nevergreen':1
                                   'search_artist'  'and':2 'stars':1 'stips':3
                                  'search_release'  '37':2 'progsoup':1
                                     'search_rest'  '2159':3 'classicprogpsy':1 'cppex':5 'progressive':6 'progsoup':2 'rock':4
                                    'search_combo'  '2159':9 '37':6C 'and':3B 'classicprogpsy':7 'cppex':11 'nevergreen':1A 'progressive':12 'progsoup':5C,8 'rock':10 'stars':2B 'stips':4B
                                    'tag_tracknum'  28
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1976
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737287.1080127  (2021-05-11 14:48:07)
                             'size'  20585888