======================== unified (from filesystem) ========================
                                         'bitrate'  '195.342'
                                        'duration'  '156'
                                          'artist'  'Rodney.Bashford; Band of the Grenadier Guards'
                                     'text_people'  'Crawford'
                                         'release'  'Sousa Marches-Stirring Maches Of the USA Services'
                                           'title'  'US Air Force The Army Air Corps (Wild Blue Yonder) (Crawford)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'loc-namerica'
                                             'bpm'  '119.546'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Sousa Marches-Stirring Maches Of the USA Services'
'TBPM' (BPM (beats per minute))                     '119.546'
'TCOM' (Composer)                                   'Crawford'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica'
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'US Air Force The Army Air Corps (Wild Blue Yonder) (Crawford)'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Rodney.Bashford; Band of the Grenadier Guards'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '20'
'TXXX:BAND'                                         'Rodney.Bashford; Band of the Grender Guards'
'TXXX:ORGANIZATION'                                 'Decca London'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+9.74 dB'
'TXXX:replaygain_track_peak'                        '0.154199'

========================== row from database ==========================
                                              'id'  303600
                                            'path'  /data/Music/Bulk/00localcharacter/Sousa Marches; Stirring Marches of the USA Services (Rodney Bashford)/20  US Air Force The Army Air Corps (Wild Blue Yonder) (Crawford).mp3
                                         'working'  None
                                         'bitrate'  195
                                    'duration_sec'  156
                                           'genre'  loc-namerica
                                        'filesize'  3833825
                                           'mtime'  1621629775
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Marches; (Rodney Bashford) 20 loc namerica
                                      'tag_artist'  Rodney.Bashford; Band of the Grenadier Guards
                                     'tag_release'  Sousa Marches-Stirring Maches Of the USA Services
                                       'tag_title'  US Air Force The Army Air Corps (Wild Blue Yonder) (Crawford)
                                             'bpm'  119.546
                                    'search_title'  'air':2 'army':5 'blue':9 'corps':6 'crawford':12,13 'force':3 'the':4 'us':1 'wild':7,8 'yonder':10,11
                                   'search_artist'  'band':4 'bashford':2 'grenadier':7 'guards':8 'of':5 'rodney':1 'rodneybashford':3 'the':6
                                  'search_release'  'maches':5 'marches':2 'marchesstirring':4 'of':6 'services':9 'sousa':1 'stirring':3 'the':7 'usa':8
                                     'search_rest'  '20':7 'bashford':5,6 'loc':8 'marches':1,2 'namerica':9 'rodney':3,4
                                    'search_combo'  '20':37 'air':2A 'army':5A 'band':17B 'bashford':15B,35,36 'blue':9A 'corps':6A 'crawford':12A,13A 'force':3A 'grenadier':20B 'guards':21B 'loc':38 'maches':26C 'marches':23C,31,32 'marchesstirring':25C 'namerica':39 'of':18B,27C 'rodney':14B,33,34 'rodneybashford':16B 'services':30C 'sousa':22C 'stirring':24C 'the':4A,19B,28C 'us':1A 'usa':29C 'wild':7A,8A 'yonder':10A,11A
                                    'tag_tracknum'  20
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1969
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629775.0237288  (2021-05-21 22:42:55)
                             'size'  3833825