======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '200'
                                          'artist'  'Eugene Jaudas National Promenade Band'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol  2967'
                                           'title'  "Walkin' The Dog"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1916'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '89.493'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison Blue Amberol  2967'
'TBPM' (BPM (beats per minute))                     '89.493'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1916'
'TIT2' (Title/songname/content description)         "Walkin' The Dog"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Eugene Jaudas National Promenade Band'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'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'                        '+0.40 dB'
'TXXX:replaygain_track_peak'                        '0.547745'

========================== row from database ==========================
                                              'id'  1427232
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1916/Eugene Jaudas National Promenade Band - Walking The Dog 1916.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  200
                                           'genre'  prerock-band
                                        'filesize'  4017970
                                           'mtime'  1620559561
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1916 Walking 1916 prerock band
                                      'tag_artist'  Eugene Jaudas National Promenade Band
                                     'tag_release'  Edison Blue Amberol  2967
                                       'tag_title'  Walkin' The Dog
                                             'bpm'  89.493
                                    'search_title'  'dog':4 'the':3 'walkin':1,2
                                   'search_artist'  'band':5 'eugene':1 'jaudas':2 'national':3 'promenade':4
                                  'search_release'  '2967':4 'amberol':3 'blue':2 'edison':1
                                     'search_rest'  '00oldiepop':5 '1916':6 'band':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'walking':7
                                    'search_combo'  '00oldiepop':18 '1916':19 '2967':13C 'amberol':12C 'band':9B,22 'blue':11C 'country':17 'dog':4A 'edison':10C 'eugene':5B 'exotica':15 'jaudas':6B 'jazz':14 'national':7B 'oldies':16 'prerock':21 'promenade':8B 'the':3A 'walkin':1A,2A 'walking':20
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1916
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559561.4141653  (2021-05-09 13:26:01)
                             'size'  4017970