======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '205'
                                          'artist'  'Theo Heldt u.s. Orchester mit Heinz Larsen'
                                     'text_people'  'L. Schmidseder / S. Richter'
                                         'release'  'tango in europe'
                                           'title'  'Ein Lied der Balalaika'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '116.924'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'tango in europe'
'TBPM' (BPM (beats per minute))                     '116.924'
'TCOM' (Composer)                                   'L. Schmidseder / S. Richter'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TIT2' (Title/songname/content description)         'Ein Lied der Balalaika'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Theo Heldt u.s. Orchester mit Heinz Larsen'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.40 dB'
'TXXX:replaygain_track_peak'                        '0.554782'

========================== row from database ==========================
                                              'id'  851486
                                            'path'  /data/Music/Bulk/00localcharacter/tango in europe (various)/Theo Heldt u.s. Orchester mit Heinz Larsen - Ein Lied der Balalaika.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  205
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  3286371
                                           'mtime'  1620528506
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter (various) loc style or milonga
                                      'tag_artist'  Theo Heldt u.s. Orchester mit Heinz Larsen
                                     'tag_release'  tango in europe
                                       'tag_title'  Ein Lied der Balalaika
                                             'bpm'  116.924
                                    'search_title'  'balalaika':4 'der':3 'ein':1 'lied':2
                                   'search_artist'  'heinz':8 'heldt':2 'larsen':9 'mit':7 'orchester':6 's':4 'theo':1 'u':3 'us':5
                                  'search_release'  'europe':3 'in':2 'tango':1
                                     'search_rest'  'loc':3 'milonga':6 'or':5 'style':4 'various':1,2
                                    'search_combo'  'balalaika':4A 'der':3A 'ein':1A 'europe':16C 'heinz':12B 'heldt':6B 'in':15C 'larsen':13B 'lied':2A 'loc':19 'milonga':22 'mit':11B 'or':21 'orchester':10B 's':8B 'style':20 'tango':14C 'theo':5B 'u':7B 'us':9B 'various':17,18
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528506.1418588  (2021-05-09 04:48:26)
                             'size'  3286371