======================== unified (from filesystem) ========================
                                         'bitrate'  '32.0'
                                        'duration'  '170'
                                          'artist'  'American Radio Warblers'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Skaters Waltz'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', 'Q-OLDST-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['twee-twee']"
                                     'discogstags'  "['pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-experimental-oddness;mi-whistling'
                                             'bpm'  '123.4'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '123.4'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-oddness', 'mi-whistling']
'TENC' (Encoded by)                                 'Basic Hip Digital Oddio'
'TIT2' (Title/songname/content description)         'Skaters Waltz'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'American Radio Warblers'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'pop'
'TXXX:lastfmtags'                                   'twee-twee'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-3.08 dB'
'TXXX:replaygain_track_peak'                        '0.863512'
'WXXX:'                                             WXXX(encoding=<Encoding.LATIN1: 0>, desc='', url='http://www.whistlingrecords.com')

========================== row from database ==========================
                                              'id'  1326288
                                            'path'  /data/Music/Bulk/00spent/Whistling/20 - American Radio Warblers - Skaters Waltz.mp3
                                         'working'  None
                                         'bitrate'  32
                                    'duration_sec'  170
                                           'genre'  electronic-experimental-oddness;mi-whistling
                                        'filesize'  681984
                                           'mtime'  1620527951
                                   'redo_metaread'  0
                                        'rest_str'   00spent Whistling 20 electronic experimental oddness;mi whistling
                                      'tag_artist'  American Radio Warblers
                                     'tag_release'  None
                                       'tag_title'  Skaters Waltz
                                             'bpm'  123.4
                                    'search_title'  'skaters':1 'waltz':2
                                   'search_artist'  'american':1 'radio':2 'warblers':3
                                  'search_release'  
                                     'search_rest'  '00spent':1 '20':3 'electronic':4 'experimental':5 'mi':7,9 'oddness':6,8 'whistling':2
                                    'search_combo'  '00spent':6 '20':8 'american':3B 'electronic':9 'experimental':10 'mi':12,14 'oddness':11,13 'radio':4B 'skaters':1A 'waltz':2A 'warblers':5B 'whistling':7
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['twee-twee']
                                        'tag_date'  
                                     'discogstags'  ['pop']

============================== file details ==============================
                                           'mtime'  1620527950.5865958  (2021-05-09 04:39:10)
                             'size'  681984