======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '201'
                                          'artist'  'Richard Galliano'
                                     'text_people'  'R.Galliano'
                                         'release'  ''
                                           'title'  'Waltz for Nicky'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['fip', 'tango', 'accordion', 'jazz', 'drjazzmrfunkmusic', 'french']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'mi-accordeon'
                                             'bpm'  '144.852'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '144.852'
'TCOM' (Composer)                                   'R.Galliano'
'TCON' (Content type, a.k.a. Genre)                 'mi-accordeon'
'TIT2' (Title/songname/content description)         'Waltz for Nicky'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Richard Galliano'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['fip', 'tango', 'accordion', 'jazz', 'drjazzmrfunkmusic', 'french']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.83 dB'
'TXXX:replaygain_track_peak'                        '0.392936'

========================== row from database ==========================
                                              'id'  357230
                                            'path'  /data/Music/Bulk/00localcharacter/Akkordeonist/Richard Galliano - Waltz for Nicky.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  201
                                           'genre'  mi-accordeon
                                        'filesize'  4845948
                                           'mtime'  1620528299
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Akkordeonist mi accordeon
                                      'tag_artist'  Richard Galliano
                                     'tag_release'  None
                                       'tag_title'  Waltz for Nicky
                                             'bpm'  144.852
                                    'search_title'  'for':2 'nicky':3 'waltz':1
                                   'search_artist'  'galliano':2 'richard':1
                                  'search_release'  
                                     'search_rest'  'accordeon':3 'akkordeonist':1 'mi':2
                                    'search_combo'  'accordeon':8 'akkordeonist':6 'for':2A 'galliano':5B 'mi':7 'nicky':3A 'richard':4B 'waltz':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['fip', 'tango', 'accordion', 'jazz', 'drjazzmrfunkmusic', 'french']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528298.7850301  (2021-05-09 04:44:58)
                             'size'  4845948