======================== unified (from filesystem) ========================
                                         'bitrate'  '165.423'
                                        'duration'  '245'
                                          'artist'  'City To City'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'The Road Ahead'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'q-syn-2', "
 "'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-2', "
 "'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['hardcore', 'ruhrpott', 'rock', 'home collection', '90s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio'
                                             'bpm'  '123.632'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '123.632'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'The Road Ahead'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'City To City'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['hardcore', 'ruhrpott', 'rock', 'home collection', '90s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.49 dB'
'TXXX:replaygain_track_peak'                        '0.618892'

========================== row from database ==========================
                                              'id'  1389088
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/City To City - The Road Ahead.mp3
                                         'working'  None
                                         'bitrate'  165
                                    'duration_sec'  245
                                           'genre'  electronic-generic or radio
                                        'filesize'  5073093
                                           'mtime'  1630248926
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] electronic generic or radio
                                      'tag_artist'  City To City
                                     'tag_release'  None
                                       'tag_title'  The Road Ahead
                                             'bpm'  123.632
                                    'search_title'  'ahead':3 'road':2 'the':1
                                   'search_artist'  'city':1 'to':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'electronic':7 'files':5,6 'generic':8 'loose':3,4 'or':9 'radio':10 'unsorted':2
                                    'search_combo'  '00poprockelectronic':6 'ahead':3A 'city':4B 'electronic':12 'files':10,11 'generic':13 'loose':8,9 'or':14 'radio':15 'road':2A 'the':1A 'to':5B 'unsorted':7
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['hardcore', 'ruhrpott', 'rock', 'home collection', '90s']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1630248926.4468102  (2021-08-29 16:55:26)
                             'size'  5073093