======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '178'
                                          'artist'  'Oscar Alemán'
                                     'text_people'  ''
                                         'release'  'Swing Guitar Masterpieces'
                                           'title'  'Russian Lullaby'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'argentina', 'jazz', 'latin', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted;mi-guitar'
                                             'bpm'  '113.0'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Swing Guitar Masterpieces'
'TBPM' (BPM (beats per minute))                     '113.0'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-jazz-unsorted', 'mi-guitar']
'TDRC' (Recording time)                             '1939'
'TIT2' (Title/songname/content description)         'Russian Lullaby'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Oscar Alemán'
'TPE2' (Band/orchestra/accompaniment)               'Oscar Alemán'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Acoustic Disc'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['guitar', 'argentina', 'jazz', 'latin', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'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'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.54 dB'
'TXXX:replaygain_track_peak'                        '0.444052'
'UFID:http://www.cddb.com/id3/taginfo1.html'        UFID(owner='http://www.cddb.com/id3/taginfo1.html', data=b'3CD3N13S4662428U10848643BD4ED8D615EDC8ACE80C90DE4D3P3')

========================== row from database ==========================
                                              'id'  1278985
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Oscar Alemán - cd1/Oscar Aleman/05 - Russian Lullaby.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  178
                                           'genre'  prerock-jb-jazz-unsorted;mi-guitar
                                        'filesize'  2862560
                                           'mtime'  1620533218
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country cd1 Aleman 05 prerock jb jazz unsorted;mi guitar
                                      'tag_artist'  Oscar Alemán
                                     'tag_release'  Swing Guitar Masterpieces
                                       'tag_title'  Russian Lullaby
                                             'bpm'  113.0
                                    'search_title'  'lullaby':2 'russian':1
                                   'search_artist'  'aleman':2,3 'oscar':1
                                  'search_release'  'guitar':2 'masterpieces':3 'swing':1
                                     'search_rest'  'aleman':6 'cd1':5 'country':4 'exotica':2 'guitar':13 'jazz':1 'jb':8 'mi':10,12 'oldies':3 'prerock':7 'unsorted':9,11
                                    'search_combo'  'aleman':4B,5B,14 'cd1':13 'country':12 'exotica':10 'guitar':7C,21 'jazz':9 'jb':16 'lullaby':2A 'masterpieces':8C 'mi':18,20 'oldies':11 'oscar':3B 'prerock':15 'russian':1A 'swing':6C 'unsorted':17,19
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['guitar', 'argentina', 'jazz', 'latin', 'swing']
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620533218.1044872  (2021-05-09 06:06:58)
                             'size'  2862560