======================== unified (from filesystem) ========================
                                         'bitrate'  '64.0'
                                        'duration'  '199'
                                          'artist'  'Eddie Condon'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Dippermouth Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-2', "
 "'Q-OLDST-1', 'Q-SYN-1', 'Q-BUSY-3', 'Q-GRIT-1', 'Q-PLAY-2', 'q-bass-1', "
 "'Q-CHART-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'Q-MIXBEAT-2']")
                                      'lastfmtags'  "['guitar', 'indiana', 'jazz', 'dixieland', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '116.9'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '116.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TIT2' (Title/songname/content description)         'Dippermouth Blues'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '199000'
'TPE1' (Lead performer(s)/Soloist(s))               'Eddie Condon'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['guitar', 'indiana', 'jazz', 'dixieland', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-5.53 dB'
'TXXX:replaygain_track_peak'                        '1.194923'

========================== row from database ==========================
                                              'id'  1530501
                                            'path'  /data/Music/Bulk/00poprockelectronic/12055 - eddie condon - ringside at condon_s/01 - dippermouth blues.mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  199
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  1595398
                                           'mtime'  1620540747
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 12055 eddie condon ringside at condon_s 01 dippermouth blues prerock jb jazz unsorted
                                      'tag_artist'  Eddie Condon
                                     'tag_release'  None
                                       'tag_title'  Dippermouth Blues
                                             'bpm'  116.9
                                    'search_title'  'blues':2 'dippermouth':1
                                   'search_artist'  'condon':2 'eddie':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '12055':2 'at':6 'blues':10 'condon':4,7 'dippermouth':9 'eddie':3 'jazz':13 'jb':12 'prerock':11 'ringside':5 's':8 'unsorted':14
                                    'search_combo'  '00poprockelectronic':5 '12055':6 'at':10 'blues':2A,14 'condon':4B,8,11 'dippermouth':1A,13 'eddie':3B,7 'jazz':17 'jb':16 'prerock':15 'ringside':9 's':12 'unsorted':18
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-1', 'Q-GRIT-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-CHART-2', 'q-drums-4', 'Q-SYN-1', 'q-other-3', 'Q-BUSY-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1']
                                      'lastfmtags'  ['guitar', 'indiana', 'jazz', 'dixieland', 'swing']
                                        'tag_date'  
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620540746.5530288  (2021-05-09 08:12:26)
                             'size'  1595398