======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '489'
                                          'artist'  'London Elektricity'
                                     'text_people'  ''
                                         'release'  'Ultrasound'
                                           'title'  'Ultrasound'
                                           'quals'  ("['q-bass-4', 'q-play-2', 'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', "
 "'q-vocals-1']")
                                      'lastfmtags'  "['drum and bass', 'dnb', 'electronic', 'drum n bass', 'liquid funk']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'electronic'
                                             'bpm'  '108.471'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Ultrasound'
'TBPM' (BPM (beats per minute))                     '108.471'
'TCON' (Content type, a.k.a. Genre)                 'electronic'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Ultrasound'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'London Elektricity'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['drum and bass', 'dnb', 'electronic', 'drum n bass', 'liquid funk']
'TXXX:q-bass'                                       '4'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.62 dB'
'TXXX:replaygain_track_peak'                        '0.958579'

========================== row from database ==========================
                                              'id'  1316646
                                            'path'  /data/Music/Bulk/00poprockelectronic/Dwarf Electro - London Elektricity/data/pool/compressed/Music/Bulk/00poprockelectronic-elec-synthy-techy/The Peter Nice Trio - /data/pool/compressed/Music/Bulk/00poprockelectronic-elec-synthy-techy/Hospital/Ultrasound/01 - London Elektricity - Ultrasound.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  489
                                           'genre'  electronic
                                        'filesize'  11757397
                                           'mtime'  1620172883
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Dwarf Electro data pool compressed Music Bulk 00poprockelectronic elec synthy techy The Peter Nice Trio data pool compressed Music Bulk 00poprockelectronic elec synthy techy Hospital 01 electronic
                                      'tag_artist'  London Elektricity
                                     'tag_release'  Ultrasound
                                       'tag_title'  Ultrasound
                                             'bpm'  108.471
                                    'search_title'  'ultrasound':1
                                   'search_artist'  'elektricity':2 'london':1
                                  'search_release'  'ultrasound':1
                                     'search_rest'  '00poprockelectronic':1 'bulk':8 'compressed':6 'data':4 'dwarf':2 'elec':9 'electro':3 'electronic':17 'hospital':16 'music':7 'nice':14 'peter':13 'pool':5 'synthy':10 'techy':11 'the':12 'trio':15
                                    'search_combo'  '00poprockelectronic':5 'bulk':12 'compressed':10 'data':8 'dwarf':6 'elec':13 'electro':7 'electronic':21 'elektricity':3B 'hospital':20 'london':2B 'music':11 'nice':18 'peter':17 'pool':9 'synthy':14 'techy':15 'the':16 'trio':19 'ultrasound':1A,4C
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['q-chart-2', 'q-drums-3', 'q-vocals-1', 'q-other-2', 'q-play-2', 'q-piano-1', 'q-bass-4']
                                      'lastfmtags'  ['drum and bass', 'dnb', 'electronic', 'drum n bass', 'liquid funk']
                                        'tag_date'  1997
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620172882.7493184  (2021-05-05 02:01:22)
                             'size'  11757397