======================== unified (from filesystem) ========================
                                         'bitrate'  '119.557'
                                        'duration'  '171'
                                          'artist'  'Charlie Poole'
                                     'text_people'  ''
                                         'release'  '2Ufrom south sea island JIM'
                                           'title'  "Don't Let Your Deal Go Down Bl"
                                           '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-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk', 'country', 'fiddle', 'old timey', 'americana']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '138.892'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '2Ufrom south sea island JIM'
'TBPM' (BPM (beats per minute))                     '138.892'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         "Don't Let Your Deal Go Down Bl"
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Charlie Poole'
'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'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['folk', 'country', 'fiddle', 'old timey', 'americana']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.31 dB'
'TXXX:replaygain_track_peak'                        '0.501639'

========================== row from database ==========================
                                              'id'  1497557
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Charlie Poole - Don_t Let Your Deal Go Down Blues 1925.wma.mp3
                                         'working'  None
                                         'bitrate'  119
                                    'duration_sec'  171
                                           'genre'  loc-namerica-country
                                        'filesize'  2566397
                                           'mtime'  1621628042
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Don_t Blues 1925.wma loc namerica country
                                      'tag_artist'  Charlie Poole
                                     'tag_release'  2Ufrom south sea island JIM
                                       'tag_title'  Don't Let Your Deal Go Down Bl
                                             'bpm'  138.892
                                    'search_title'  'bl':9 'deal':6 'don':1 'dont':3 'down':8 'go':7 'let':4 't':2 'your':5
                                   'search_artist'  'charlie':1 'poole':2
                                  'search_release'  '2ufrom':1 'island':4 'jim':5 'sea':3 'south':2
                                     'search_rest'  '1925':10 '1925wma':12 'blues':9 'country':4 'don':7 'exotica':2 'jazz':1 'loc':13 'music':6 'namerica':14 'old':5 'oldies':3 't':8 'wma':11
                                    'search_combo'  '1925':26 '1925wma':28 '2ufrom':12C 'bl':9A 'blues':25 'charlie':10B 'country':20 'deal':6A 'don':1A,23 'dont':3A 'down':8A 'exotica':18 'go':7A 'island':15C 'jazz':17 'jim':16C 'let':4A 'loc':29 'music':22 'namerica':30 'old':21 'oldies':19 'poole':11B 'sea':14C 'south':13C 't':2A,24 'wma':27 'your':5A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['folk', 'country', 'fiddle', 'old timey', 'americana']
                                        'tag_date'  1945
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621628042.3358064  (2021-05-21 22:14:02)
                             'size'  2566397