======================== unified (from filesystem) ========================
                                         'bitrate'  '202.83'
                                        'duration'  '166'
                                          'artist'  'harry james & his orchestra'
                                     'text_people'  ''
                                         'release'  "Jon Savage's Teenage"
                                           'title'  'back beat boogie (1939)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'jazz', 'big band', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '97.039'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "Jon Savage's Teenage"
'TBPM' (BPM (beats per minute))                     '97.039'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1939'
'TENC' (Encoded by)                                 'Lame 3.97'
'TIT2' (Title/songname/content description)         'back beat boogie (1939)'
'TKEY' (Initial key)                                '9A'
'TLAN' (Language(s))                                'English'
'TPE1' (Lead performer(s)/Soloist(s))               'harry james & his orchestra'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '16'
'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:lastfmtags'                                   ['instrumental', 'jazz', 'big band', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.51 dB'
'TXXX:replaygain_track_peak'                        '0.507695'

========================== row from database ==========================
                                              'id'  978764
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/VA-Jon_Savages_Teenage-2009-BCC/16-harry_james_and_his_orchestra_-_back_beat_boogie_(1939).mp3
                                         'working'  None
                                         'bitrate'  202
                                    'duration_sec'  166
                                           'genre'  prerock-swing
                                        'filesize'  4217651
                                           'mtime'  1620562717
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country VA Jon_Savages_Teenage 2009 BCC 16 harry_james_and_his_orchestra_ _back_beat_boogie_(1939) prerock swing
                                      'tag_artist'  harry james & his orchestra
                                     'tag_release'  Jon Savage's Teenage
                                       'tag_title'  back beat boogie (1939)
                                             'bpm'  97.039
                                    'search_title'  '1939':4,5 'back':1 'beat':2 'boogie':3
                                   'search_artist'  'harry':1 'his':3 'james':2 'orchestra':4
                                  'search_release'  'jon':1 's':3 'savage':2 'savages':4 'teenage':5
                                     'search_rest'  '1939':19,23 '2009':9 'and':13 'back':16,20 'bcc':10 'beat':17,21 'boogie':18,22 'country':4 'exotica':2 'harry':11 'his':14 'james':12 'jazz':1 'jon':6 'oldies':3 'orchestra':15 'prerock':24 'savages':7 'swing':25 'teenage':8 'va':5
                                    'search_combo'  '1939':4A,5A,33,37 '2009':23 'and':27 'back':1A,30,34 'bcc':24 'beat':2A,31,35 'boogie':3A,32,36 'country':18 'exotica':16 'harry':6B,25 'his':8B,28 'james':7B,26 'jazz':15 'jon':10C,20 'oldies':17 'orchestra':9B,29 'prerock':38 's':12C 'savage':11C 'savages':13C,21 'swing':39 'teenage':14C,22 'va':19
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'jazz', 'big band', 'swing']
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562716.66105  (2021-05-09 14:18:36)
                             'size'  4217651