======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '158'
                                          'artist'  'Les Paul guitar solo'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Walkin' And Whistlin' Blues"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1951'
                                        'comments'  ''
                                           'genre'  'prerock-guitar'
                                             'bpm'  '86.180'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '86.180'
'TCON' (Content type, a.k.a. Genre)                 'prerock-guitar'
'TDRC' (Recording time)                             '1951'
'TIT2' (Title/songname/content description)         "Walkin' And Whistlin' Blues"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Les Paul guitar solo'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+4.35 dB'
'TXXX:replaygain_track_peak'                        '0.232628'

========================== row from database ==========================
                                              'id'  1507351
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1951/Les Paul guitar solo - Walkin_ And Whistlin_ Blues 1951.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  158
                                           'genre'  prerock-guitar
                                        'filesize'  3172146
                                           'mtime'  1621705357
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1951 Walkin_ Whistlin_ 1951 prerock
                                      'tag_artist'  Les Paul guitar solo
                                     'tag_release'  None
                                       'tag_title'  Walkin' And Whistlin' Blues
                                             'bpm'  86.18
                                    'search_title'  'and':3 'blues':6 'walkin':1,2 'whistlin':4,5
                                   'search_artist'  'guitar':3 'les':1 'paul':2 'solo':4
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1951':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'walkin':7 'whistlin':8
                                    'search_combo'  '00oldiepop':15 '1951':16 'and':3A 'blues':6A 'country':14 'exotica':12 'guitar':9B 'jazz':11 'les':7B 'oldies':13 'paul':8B 'prerock':19 'solo':10B 'walkin':1A,2A,17 'whistlin':4A,5A,18
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1951
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705357.3219974  (2021-05-22 19:42:37)
                             'size'  3172146