======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '159'
                                          'artist'  'Robert Johnson'
                                     'text_people'  ''
                                         'release'  'The Complete Recordings (Disc 1)'
                                           'title'  'When You Got A Good Friend'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'acoustic', 'blues', 'delta blues', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '102'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Complete Recordings (Disc 1)'
'TBPM' (BPM (beats per minute))                     '102'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1936'
'TIT2' (Title/songname/content description)         'When You Got A Good Friend'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Robert Johnson'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['guitar', 'acoustic', 'blues', 'delta blues', 'folk']
'TXXX:q-bass'                                       '1'
'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-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.22 dB'
'TXXX:replaygain_track_peak'                        '0.438350'

========================== row from database ==========================
                                              'id'  670127
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Robert Johnson CD1/07 Robert Johnson - When You Got A Good Friend.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  159
                                           'genre'  prerock-jb-blues
                                        'filesize'  3833007
                                           'mtime'  1620402509
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country CD1 07 prerock jb blues
                                      'tag_artist'  Robert Johnson
                                     'tag_release'  The Complete Recordings (Disc 1)
                                       'tag_title'  When You Got A Good Friend
                                             'bpm'  102.0
                                    'search_title'  'a':4 'friend':6 'good':5 'got':3 'when':1 'you':2
                                   'search_artist'  'johnson':2 'robert':1
                                  'search_release'  '1':6,7 'complete':2 'disc':4,5 'recordings':3 'the':1
                                     'search_rest'  'blues':8 'cd1':5 'country':4 'exotica':2 'jazz':1 'jb':7 'oldies':3 'prerock':6
                                    'search_combo'  '1':14C,15C 'a':4A 'blues':23 'cd1':20 'complete':10C 'country':19 'disc':12C,13C 'exotica':17 'friend':6A 'good':5A 'got':3A 'jazz':16 'jb':22 'johnson':8B 'oldies':18 'prerock':21 'recordings':11C 'robert':7B 'the':9C 'when':1A 'you':2A
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'acoustic', 'blues', 'delta blues', 'folk']
                                        'tag_date'  1936
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620402509.3643942  (2021-05-07 17:48:29)
                             'size'  3833007