======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '146'
                                          'artist'  'Klaas van Beeck KRO Dansorkest'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Railroad Rhythm'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1948'
                                        'comments'  ''
                                           'genre'  'prerock-vocal;loc-eur-netherlands'
                                             'bpm'  '143.721'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '143.721'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-vocal', 'loc-eur-netherlands']
'TDRC' (Recording time)                             '1948'
'TIT2' (Title/songname/content description)         'Railroad Rhythm'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Klaas van Beeck KRO Dansorkest'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'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'                        '+2.92 dB'
'TXXX:replaygain_track_peak'                        '0.475772'

========================== row from database ==========================
                                              'id'  1429635
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1948/Klaas van Beeck KRO Dansorkest - Railroad Rhythm 20-10-1948.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  146
                                           'genre'  prerock-vocal;loc-eur-netherlands
                                        'filesize'  2936626
                                           'mtime'  1621627636
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1948 20 10 1948 prerock vocal;loc eur netherlands
                                      'tag_artist'  Klaas van Beeck KRO Dansorkest
                                     'tag_release'  None
                                       'tag_title'  Railroad Rhythm
                                             'bpm'  143.721
                                    'search_title'  'railroad':1 'rhythm':2
                                   'search_artist'  'beeck':3 'dansorkest':5 'klaas':1 'kro':4 'van':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1948':6 '20':7 'country':4 'eur':13 'exotica':2 'jazz':1 'loc':10,12 'netherlands':14 'oldies':3 'prerock':8 'vocal':9,11
                                    'search_combo'  '00oldiepop':12 '1948':13 '20':14 'beeck':5B 'country':11 'dansorkest':7B 'eur':20 'exotica':9 'jazz':8 'klaas':3B 'kro':6B 'loc':17,19 'netherlands':21 'oldies':10 'prerock':15 'railroad':1A 'rhythm':2A 'van':4B 'vocal':16,18
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1948
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627635.9423068  (2021-05-21 22:07:15)
                             'size'  2936626