======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '172'
                                          'artist'  'Sid Bass'
                                     'text_people'  ''
                                         'release'  'History of Space Age Pop, Vol. 1: Melodies and Mischief'
                                           'title'  'Powerhouse'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['illstreet', 'jazz', 'lounge', 'swing', 'all']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '145.3'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'History of Space Age Pop, Vol. 1: Melodies and Mischief'
'TBPM' (BPM (beats per minute))                     '145.3'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-lounge or exotica or bossa'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'Powerhouse'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '172460'
'TPE1' (Lead performer(s)/Soloist(s))               'Sid Bass'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['illstreet', 'jazz', 'lounge', 'swing', 'all']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                        '+2.84 dB'
'TXXX:replaygain_track_peak'                        '0.386332'

========================== row from database ==========================
                                              'id'  746019
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/va - space age pop & mid century domestics (jingles & themes)/(1956) sid bass - powerhouse.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  172
                                           'genre'  prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  4151338
                                           'mtime'  1620539217
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm va space age pop & mid century domestics (jingles & themes) (1956) sid bass powerhouse prerock jb jazz lounge exotica bossa
                                      'tag_artist'  Sid Bass
                                     'tag_release'  History of Space Age Pop, Vol. 1: Melodies and Mischief
                                       'tag_title'  Powerhouse
                                             'bpm'  145.3
                                    'search_title'  'powerhouse':1
                                   'search_artist'  'bass':2 'sid':1
                                  'search_release'  '1':9,10 'age':4 'and':12 'history':1 'melodies':11 'mischief':13 'of':2 'pop':5,6 'space':3 'vol':7,8
                                     'search_rest'  '1956':12,13 'age':3 'bass':15 'bossa':22 'century':6 'domestics':7 'exotica':21 'jazz':19 'jb':18 'jingles':8,9 'lounge':20 'mid':5 'pop':4 'powerhouse':16 'prerock':17 'sid':14 'space':2 'themes':10,11 'va':1
                                    'search_combo'  '1':12C,13C '1956':28,29 'age':7C,19 'and':15C 'bass':3B,31 'bossa':38 'century':22 'domestics':23 'exotica':37 'history':4C 'jazz':35 'jb':34 'jingles':24,25 'lounge':36 'melodies':14C 'mid':21 'mischief':16C 'of':5C 'pop':8C,9C,20 'powerhouse':1A,32 'prerock':33 'sid':2B,30 'space':6C,18 'themes':26,27 'va':17 'vol':10C,11C
                                    'tag_tracknum'  16
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['illstreet', 'jazz', 'lounge', 'swing', 'all']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620539217.0010839  (2021-05-09 07:46:57)
                             'size'  4151338