======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '40'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'Radio Archival Oddities'
                                           'title'  'Ad For The Last Beatles Concert'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-1', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '08'
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'nonmusic-speech-comedy or drama'
                                             'bpm'  '142.1'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Radio Archival Oddities'
'TBPM' (BPM (beats per minute))                     '142.1'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-comedy or drama'
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Ad For The Last Beatles Concert'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TRCK' (Track number/Position in set)               '08'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.21 dB'
'TXXX:replaygain_track_peak'                        '0.208253'
'TXXX:tracknum'                                     '08'

========================== row from database ==========================
                                              'id'  501051
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Radio Archival Oddities (wfmu compilation tape)/side a [192k]/08 Ad For The Last Beatles Concert.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  40
                                           'genre'  nonmusic-speech-comedy or drama
                                        'filesize'  965778
                                           'mtime'  1637329891
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm (wfmu compilation tape) side [192k] 08 nonmusic speech comedy drama
                                      'tag_artist'  [unknown]
                                     'tag_release'  Radio Archival Oddities
                                       'tag_title'  Ad For The Last Beatles Concert
                                             'bpm'  142.1
                                    'search_title'  'ad':1 'beatles':5 'concert':6 'for':2 'last':4 'the':3
                                   'search_artist'  'unknown':1,2
                                  'search_release'  'archival':2 'oddities':3 'radio':1
                                     'search_rest'  '192k':7,8 'comedy':11 'compilation':3 'drama':12 'nonmusic':9 'side':6 'speech':10 'tape':4,5 'wfmu':1,2
                                    'search_combo'  '192k':18,19 'ad':1A 'archival':10C 'beatles':5A 'comedy':22 'compilation':14 'concert':6A 'drama':23 'for':2A 'last':4A 'nonmusic':20 'oddities':11C 'radio':9C 'side':17 'speech':21 'tape':15,16 'the':3A 'unknown':7B,8B 'wfmu':12,13
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-1', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['mysterious', 'unknown', 'all', 'mistagged artist', 'rock']
                                        'tag_date'  1970
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329890.6160731  (2021-11-19 14:51:30)
                             'size'  965778