======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '138'
                                          'artist'  'The Voices of Walter Schumann'
                                     'text_people'  ''
                                         'release'  'Ultra-Lounge, Vol. 3: Space Capades'
                                           'title'  'Holiday for the Strings'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['lounge', 'space age pop', 'easy listening', 'all', 'ultra-lounge']"
                                     'discogstags'  "['pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1951'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '145.4'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Ultra-Lounge, Vol. 3: Space Capades'
'TBPM' (BPM (beats per minute))                     '145.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-lounge or exotica or bossa'
'TDRC' (Recording time)                             '1951'
'TIT2' (Title/songname/content description)         'Holiday for the Strings'
'TKEY' (Initial key)                                '5A'
'TLEN' (Length)                                     '138501'
'TPE1' (Lead performer(s)/Soloist(s))               'The Voices of Walter Schumann'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'pop'
'TXXX:lastfmtags'                                   ['lounge', 'space age pop', 'easy listening', 'all', 'ultra-lounge']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.98 dB'
'TXXX:replaygain_track_peak'                        '0.587521'

========================== row from database ==========================
                                              'id'  746153
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/va - space age pop & mid century domestics (jingles & themes)/(1951) the voices of walter schumann - holiday for the strings.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  138
                                           'genre'  prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  3334269
                                           'mtime'  1620539205
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm va space age pop & mid century domestics (jingles & themes) (1951) voices walter schumann holiday strings prerock jb jazz lounge exotica bossa
                                      'tag_artist'  The Voices of Walter Schumann
                                     'tag_release'  Ultra-Lounge, Vol. 3: Space Capades
                                       'tag_title'  Holiday for the Strings
                                             'bpm'  145.4
                                    'search_title'  'for':2 'holiday':1 'strings':4 'the':3
                                   'search_artist'  'of':3 'schumann':5 'the':1 'voices':2 'walter':4
                                  'search_release'  '3':6,7 'capades':9 'lounge':2 'space':8 'ultra':1 'ultralounge':3 'vol':4,5
                                     'search_rest'  '1951':12,13 'age':3 'bossa':24 'century':6 'domestics':7 'exotica':23 'holiday':17 'jazz':21 'jb':20 'jingles':8,9 'lounge':22 'mid':5 'pop':4 'prerock':19 'schumann':16 'space':2 'strings':18 'themes':10,11 'va':1 'voices':14 'walter':15
                                    'search_combo'  '1951':30,31 '3':15C,16C 'age':21 'bossa':42 'capades':18C 'century':24 'domestics':25 'exotica':41 'for':2A 'holiday':1A,35 'jazz':39 'jb':38 'jingles':26,27 'lounge':11C,40 'mid':23 'of':7B 'pop':22 'prerock':37 'schumann':9B,34 'space':17C,20 'strings':4A,36 'the':3A,5B 'themes':28,29 'ultra':10C 'ultralounge':12C 'va':19 'voices':6B,32 'vol':13C,14C 'walter':8B,33
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['lounge', 'space age pop', 'easy listening', 'all', 'ultra-lounge']
                                        'tag_date'  1951
                                     'discogstags'  ['pop']

============================== file details ==============================
                                           'mtime'  1620539205.4843688  (2021-05-09 07:46:45)
                             'size'  3334269