======================== unified (from filesystem) ========================
                                         'bitrate'  '159.766'
                                        'duration'  '155'
                                          'artist'  'Marlene Dietrich'
                                     'text_people'  ''
                                         'release'  'Von Kopf bis Fuß...'
                                           'title'  "I've Been in Love Before"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', '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'  "['german', 'cabaret', 'female vocalists', 'oldies', 'deutsch']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '18'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'prerock-cabaret'
                                             'bpm'  '115.6'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             'F90C4D12'
'TALB' (Album/Movie/Show title)                     'Von Kopf bis Fuß...'
'TBPM' (BPM (beats per minute))                     '115.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-cabaret'
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         "I've Been in Love Before"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Marlene Dietrich'
'TRCK' (Track number/Position in set)               '13/18'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.92, VBR 3, Stereo, High quality'
'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:lastfmtags'                                   ['german', 'cabaret', 'female vocalists', 'oldies', 'deutsch']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'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'                        '+3.64 dB'
'TXXX:replaygain_track_peak'                        '0.593883'

========================== row from database ==========================
                                              'id'  1519557
                                            'path'  /data/Music/Bulk/00instruments-classical/Marlene Dietrich/Von Kopf bis Fu_/Marlene Dietrich - Von Kopf bis Fu_... - 13 - I_ve Been in Love Before.mp3
                                         'working'  None
                                         'bitrate'  159
                                    'duration_sec'  155
                                           'genre'  prerock-cabaret
                                        'filesize'  3099243
                                           'mtime'  1620561649
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Fu_ Fu_... 13 I_ve prerock cabaret
                                      'tag_artist'  Marlene Dietrich
                                     'tag_release'  Von Kopf bis Fuß...
                                       'tag_title'  I've Been in Love Before
                                             'bpm'  115.6
                                    'search_title'  'been':4 'before':7 'i':1 'in':5 'ive':3 'love':6 've':2
                                   'search_artist'  'dietrich':2 'marlene':1
                                  'search_release'  'bis':3 'fuss':6,7 'fuß':4,5 'kopf':2 'von':1
                                     'search_rest'  '00instruments':1 'cabaret':8 'classical':2 'fu':3,4 'i':5 'prerock':7 've':6
                                    'search_combo'  '00instruments':17 'been':4A 'before':7A 'bis':12C 'cabaret':24 'classical':18 'dietrich':9B 'fu':19,20 'fuss':15C,16C 'fuß':13C,14C 'i':1A,21 'in':5A 'ive':3A 'kopf':11C 'love':6A 'marlene':8B 'prerock':23 've':2A,22 'von':10C
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  10A
                                           '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-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['german', 'cabaret', 'female vocalists', 'oldies', 'deutsch']
                                        'tag_date'  1989
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561649.322385  (2021-05-09 14:00:49)
                             'size'  3099243