======================== unified (from filesystem) ========================
                                         'bitrate'  '214.856'
                                        'duration'  '323'
                                          'artist'  'Richard Wagner'
                                     'text_people'  ''
                                         'release'  'The Ride of the Valkyries (Overtures and Choruses)'
                                           'title'  'Lohengrin: Treulich gefuhrt ziehet dahin (Bridal Chorus)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['opera', 'german', 'composers', 'romantic', 'classical']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '136.184'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Ride of the Valkyries (Overtures and Choruses)'
'TBPM' (BPM (beats per minute))                     '136.184'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Lohengrin: Treulich gefuhrt ziehet dahin (Bridal Chorus)'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Richard Wagner'
'TRCK' (Track number/Position in set)               '9'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['opera', 'german', 'composers', 'romantic', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+4.33 dB'
'TXXX:replaygain_track_peak'                        '0.934017'

========================== row from database ==========================
                                              'id'  1348599
                                            'path'  /data/Music/Bulk/00instruments-classical/Wagner - The Ride of the Valkyries (V0)/09 Lohengrin_ Treulich gefuhrt ziehet dahin (Bridal Chorus).mp3
                                         'working'  None
                                         'bitrate'  214
                                    'duration_sec'  323
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  8691730
                                           'mtime'  1620561889
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical (V0) 09 Lohengrin_ prerock classical classical instruments
                                      'tag_artist'  Richard Wagner
                                     'tag_release'  The Ride of the Valkyries (Overtures and Choruses)
                                       'tag_title'  Lohengrin: Treulich gefuhrt ziehet dahin (Bridal Chorus)
                                             'bpm'  136.184
                                    'search_title'  'bridal':7,8 'chorus':9,10 'dahin':6 'gefuhrt':4 'lohengrin':1,2 'treulich':3 'ziehet':5
                                   'search_artist'  'richard':1 'wagner':2
                                  'search_release'  'and':7 'choruses':8,9 'of':3 'overtures':5,6 'ride':2 'the':1 'valkyries':4
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':7 'lohengrin':5 'prerock':6 'v0':3,4
                                    'search_combo'  '00instruments':22 'and':19C 'bridal':7A,8A 'chorus':9A,10A 'choruses':20C,21C 'classical':23 'dahin':6A 'gefuhrt':4A 'instruments':28 'lohengrin':1A,2A,26 'of':15C 'overtures':17C,18C 'prerock':27 'richard':11B 'ride':14C 'the':13C 'treulich':3A 'v0':24,25 'valkyries':16C 'wagner':12B 'ziehet':5A
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['opera', 'german', 'composers', 'romantic', 'classical']
                                        'tag_date'  
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620561888.7742758  (2021-05-09 14:04:48)
                             'size'  8691730