======================== unified (from filesystem) ========================
                                         'bitrate'  '144.249'
                                        'duration'  '194'
                                          'artist'  'Blind Willie McTell'
                                     'text_people'  ''
                                         'release'  'The Early Years (1927-1933)'
                                           'title'  'Southern Can Is Mine'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country blues', 'blues', 'delta blues', 'folk', 'classic blues']"
                                     'discogstags'  "['blues', 'country blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '142.809'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Early Years (1927-1933)'
'TBPM' (BPM (beats per minute))                     '142.809'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'Southern Can Is Mine'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Blind Willie McTell'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['blues', 'country blues']
'TXXX:lastfmtags'                                   ['country blues', 'blues', 'delta blues', 'folk', 'classic blues']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.64 dB'
'TXXX:replaygain_track_peak'                        '0.834155'

========================== row from database ==========================
                                              'id'  968142
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Blind Willie McTell - Southern Can Is Mine.wma.mp3
                                         'working'  None
                                         'bitrate'  144
                                    'duration_sec'  194
                                           'genre'  loc-namerica-country
                                        'filesize'  3515283
                                           'mtime'  1621628015
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Mine.wma loc namerica country
                                      'tag_artist'  Blind Willie McTell
                                     'tag_release'  The Early Years (1927-1933)
                                       'tag_title'  Southern Can Is Mine
                                             'bpm'  142.809
                                    'search_title'  'can':2 'is':3 'mine':4 'southern':1
                                   'search_artist'  'blind':1 'mc':4 'mctell':3 'tell':5 'willie':2
                                  'search_release'  '1927':4 '19271933':6 '1933':5 'early':2 'the':1 'years':3
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'loc':10 'mine':7 'minewma':9 'music':6 'namerica':11 'old':5 'oldies':3 'wma':8
                                    'search_combo'  '1927':13C '19271933':15C '1933':14C 'blind':5B 'can':2A 'country':19 'early':11C 'exotica':17 'is':3A 'jazz':16 'loc':25 'mc':8B 'mctell':7B 'mine':4A,22 'minewma':24 'music':21 'namerica':26 'old':20 'oldies':18 'southern':1A 'tell':9B 'the':10C 'willie':6B 'wma':23 'years':12C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country blues', 'blues', 'delta blues', 'folk', 'classic blues']
                                        'tag_date'  1945
                                     'discogstags'  ['blues', 'country blues']

============================== file details ==============================
                                           'mtime'  1621628014.9789438  (2021-05-21 22:13:34)
                             'size'  3515283