======================== unified (from filesystem) ========================
                                         'bitrate'  '231.144'
                                        'duration'  '119'
                                          'artist'  '101 Strings'
                                     'text_people'  'J.F. Kuhn'
                                         'release'  'Tango!'
                                           'title'  'Tango Para Cuerdas (Tango For Strings)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-UNU-1', 'Q-SYN-1', 'Q-BUSY-3', 'Q-GRIT-1', 'q-bass-4', 'q-play-2', "
 "'Q-CHART-2', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'Q-MIXBEAT-1']")
                                      'lastfmtags'  "['instrumental', 'strings', 'myhitparade', 'myhits', 'easy listening']"
                                     'discogstags'  "['tango', 'latin']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '06'
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-easy listening'
                                             'bpm'  '130.9'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         "aka 'The World's Most Famous Continental Tangos'"
'GEOB:SfMarkers'                                    GEOB(encoding=<Encoding.LATIN1: 0>, mime='', filename='', desc='SfMarkers', data=b'\x0c\x00\x00\x00d\x00\x00\x00\x00\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'Tango!'
'TBPM' (BPM (beats per minute))                     '130.9'
'TCOM' (Composer)                                   'J.F. Kuhn'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-easy listening'
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'Tango Para Cuerdas (Tango For Strings)'
'TKEY' (Initial key)                                '5A'
'TLEN' (Length)                                     '122480'
'TPE1' (Lead performer(s)/Soloist(s))               '101 Strings'
'TPE2' (Band/orchestra/accompaniment)               '101 Strings'
'TPOS' (Part of a set)                              'B'
'TRCK' (Track number/Position in set)               '06'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['tango', 'latin']
'TXXX:lastfmtags'                                   ['instrumental', 'strings', 'myhitparade', 'myhits', 'easy listening']
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.46 dB'
'TXXX:replaygain_track_peak'                        '0.674459'

========================== row from database ==========================
                                              'id'  1478982
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/The 101 Strings Orchestra/1969 - Tango!/06 - Tango Para Cuerdas (Tango For Strings).mp3
                                         'working'  None
                                         'bitrate'  231
                                    'duration_sec'  119
                                           'genre'  electronic-generic or radio-easy listening
                                        'filesize'  3567929
                                           'mtime'  1621705527
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country The Orchestra 1969 06 electronic generic radio easy listening
                                      'tag_artist'  101 Strings
                                     'tag_release'  Tango!
                                       'tag_title'  Tango Para Cuerdas (Tango For Strings)
                                             'bpm'  130.9
                                    'search_title'  'cuerdas':3 'for':5 'para':2 'strings':6,7 'tango':1,4
                                   'search_artist'  '101':1 'strings':2
                                  'search_release'  'tango':1
                                     'search_rest'  '1969':7 'country':4 'easy':11 'electronic':8 'exotica':2 'generic':9 'jazz':1 'listening':12 'oldies':3 'orchestra':6 'radio':10 'the':5
                                    'search_combo'  '101':8B '1969':17 'country':14 'cuerdas':3A 'easy':21 'electronic':18 'exotica':12 'for':5A 'generic':19 'jazz':11 'listening':22 'oldies':13 'orchestra':16 'para':2A 'radio':20 'strings':6A,7A,9B 'tango':1A,4A,10C 'the':15
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-1', 'q-play-2', 'Q-OLDST-3', 'Q-GRIT-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-2', 'Q-SYN-1', 'q-other-4', 'Q-BUSY-3', 'Q-HAP-3', 'q-bass-4']
                                      'lastfmtags'  ['instrumental', 'strings', 'myhitparade', 'myhits', 'easy listening']
                                        'tag_date'  1969
                                     'discogstags'  ['tango', 'latin']

============================== file details ==============================
                                           'mtime'  1621705527.2252026  (2021-05-22 19:45:27)
                             'size'  3567929