======================== unified (from filesystem) ========================
                                         'bitrate'  '218.667'
                                        'duration'  '167'
                                          'artist'  'Organum'
                                     'text_people'  ''
                                         'release'  'Rare & Unreleased'
                                           'title'  "'-------------'"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-3', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-2', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['dark ambient', 'drone', 'experimental', 'noise', 'ambient']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  '16'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-ambient-dark'
                                             'bpm'  '138.2'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Rare & Unreleased'
'TBPM' (BPM (beats per minute))                     '138.2'
'TCON' (Content type, a.k.a. Genre)                 'electronic-ambient-dark'
'TIT2' (Title/songname/content description)         "'-------------'"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Organum'
'TPOS' (Part of a set)                              '2/3'
'TRCK' (Track number/Position in set)               '14/16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '3'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['dark ambient', 'drone', 'experimental', 'noise', 'ambient']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-2.16 dB'
'TXXX:replaygain_track_peak'                        '0.745142'

========================== row from database ==========================
                                              'id'  1513368
                                            'path'  /data/Music/Bulk/00poprockelectronic/00ambient/organum - rare and unreleased/cdr 2/14 - _-------------_.mp3
                                         'working'  None
                                         'bitrate'  218
                                    'duration_sec'  167
                                           'genre'  electronic-ambient-dark
                                        'filesize'  4576138
                                           'mtime'  1636910235
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 00ambient organum rare and unreleased cdr 2 14 _ _ electronic ambient dark
                                      'tag_artist'  Organum
                                     'tag_release'  Rare & Unreleased
                                       'tag_title'  '-------------'
                                             'bpm'  138.2
                                    'search_title'  
                                   'search_artist'  'organum':1
                                  'search_release'  'rare':1 'unreleased':2
                                     'search_rest'  '00ambient':2 '00poprockelectronic':1 '2':8 'ambient':10 'and':5 'cdr':7 'dark':11 'electronic':9 'organum':3 'rare':4 'unreleased':6
                                    'search_combo'  '00ambient':5 '00poprockelectronic':4 '2':11 'ambient':13 'and':8 'cdr':10 'dark':14 'electronic':12 'organum':1B,6 'rare':2C,7 'unreleased':3C,9
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-4', 'q-syn-3', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['dark ambient', 'drone', 'experimental', 'noise', 'ambient']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636910235.213967  (2021-11-14 18:17:15)
                             'size'  4576138