======================== unified (from filesystem) ========================
                                         'bitrate'  '102.306'
                                        'duration'  '126'
                                          'artist'  'Achilles and his Heels'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Acapulco'
                                           'quals'  ("['Q-OLDST-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'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'  ''
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '84.105'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '84.105'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TIT2' (Title/songname/content description)         'Acapulco'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Achilles and his Heels'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.23 dB'
'TXXX:replaygain_track_peak'                        '0.419041'

========================== row from database ==========================
                                              'id'  1332332
                                            'path'  /data/Music/Bulk/00poprockelectronic/misc/Achilles & his Heels - Acapulco (Fontana1961)(dg).mp3
                                         'working'  None
                                         'bitrate'  102
                                    'duration_sec'  126
                                           'genre'  loc-unsorted
                                        'filesize'  1622986
                                           'mtime'  1620401819
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic misc & (Fontana1961)(dg) loc unsorted
                                      'tag_artist'  Achilles and his Heels
                                     'tag_release'  None
                                       'tag_title'  Acapulco
                                             'bpm'  84.105
                                    'search_title'  'acapulco':1
                                   'search_artist'  'achilles':1 'and':2 'heels':4 'his':3
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'dg':4 'fontana1961':3 'fontana1961dg':5 'loc':6 'misc':2 'unsorted':7
                                    'search_combo'  '00poprockelectronic':6 'acapulco':1A 'achilles':2B 'and':3B 'dg':9 'fontana1961':8 'fontana1961dg':10 'heels':5B 'his':4B 'loc':11 'misc':7 'unsorted':12
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620401819.3179572  (2021-05-07 17:36:59)
                             'size'  1622986