======================== unified (from filesystem) ========================
                                         'bitrate'  '132.298'
                                        'duration'  '109'
                                          'artist'  'Big Joe Williams'
                                     'text_people'  ''
                                         'release'  'Play Me the Blues (disc 3)'
                                           'title'  "Baby Please Don't Go"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'old blues', 'blues', 'delta blues', 'blues guitar']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-unsorted'
                                             'bpm'  '119.758'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Play Me the Blues (disc 3)'
'TBPM' (BPM (beats per minute))                     '119.758'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-unsorted'
'TIT2' (Title/songname/content description)         "Baby Please Don't Go"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Big Joe Williams'
'TRCK' (Track number/Position in set)               '17'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['guitar', 'old blues', 'blues', 'delta blues', 'blues guitar']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'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'                        '+3.01 dB'
'TXXX:replaygain_track_peak'                        '0.652006'

========================== row from database ==========================
                                              'id'  1500753
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Big Joe Williams/MBZ;#Big Joe Williams;#Play Me the Blues (disc 3);#17;#Baby Please Don_t Go.mp3
                                         'working'  None
                                         'bitrate'  132
                                    'duration_sec'  109
                                           'genre'  prerock-jb-unsorted
                                        'filesize'  1809498
                                           'mtime'  1620528221
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country MBZ;#Big Williams;#Play 3);#17;#Baby Don_t prerock jb unsorted
                                      'tag_artist'  Big Joe Williams
                                     'tag_release'  Play Me the Blues (disc 3)
                                       'tag_title'  Baby Please Don't Go
                                             'bpm'  119.758
                                    'search_title'  'baby':1 'don':3 'dont':5 'go':6 'please':2 't':4
                                   'search_artist'  'big':1 'joe':2 'williams':3
                                  'search_release'  '3':7,8 'blues':4 'disc':5,6 'me':2 'play':1 'the':3
                                     'search_rest'  '17':14,17 '3':13,16 'baby':15,18 'big':6,8 'country':4 'don':19 'exotica':2 'jazz':1 'jb':22 'mbz':5,7 'oldies':3 'play':10,12 'prerock':21 't':20 'unsorted':23 'williams':9,11
                                    'search_combo'  '17':31,34 '3':16C,17C,30,33 'baby':1A,32,35 'big':7B,23,25 'blues':13C 'country':21 'disc':14C,15C 'don':3A,36 'dont':5A 'exotica':19 'go':6A 'jazz':18 'jb':39 'joe':8B 'mbz':22,24 'me':11C 'oldies':20 'play':10C,27,29 'please':2A 'prerock':38 't':4A,37 'the':12C 'unsorted':40 'williams':9B,26,28
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'old blues', 'blues', 'delta blues', 'blues guitar']
                                        'tag_date'  
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620528221.1860464  (2021-05-09 04:43:41)
                             'size'  1809498