======================== unified (from filesystem) ========================
                                         'bitrate'  '239.028'
                                        'duration'  '272'
                                          'artist'  'Alone'
                                     'text_people'  ''
                                         'release'  'Several Quiet Moments (Remaster)'
                                           'title'  'No Data'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-4', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-4', 'q-play-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['polish', 'hardcore', 'melodic hardcore', 'nu metal', 'rock']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2011'
                                        'comments'  ''
                                           'genre'  'eid-metal-nu'
                                             'bpm'  '119.476'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:cover'                                        type PictureType.COVER_FRONT (Cover (front)) b'cover'
                                     
'TALB' (Album/Movie/Show title)                     'Several Quiet Moments (Remaster)'
'TBPM' (BPM (beats per minute))                     '119.476'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-nu'
'TDRC' (Recording time)                             '2011'
'TIT2' (Title/songname/content description)         'No Data'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Alone'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '4'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['polish', 'hardcore', 'melodic hardcore', 'nu metal', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.62 dB'
'TXXX:replaygain_track_peak'                        '0.528818'

========================== row from database ==========================
                                              'id'  1393589
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Alone - Several Quiet Moments (Remaster) (2011)/Alone - Several Quiet Moments (Remaster) - 04 No Data.mp3
                                         'working'  None
                                         'bitrate'  239
                                    'duration_sec'  272
                                           'genre'  eid-metal-nu
                                        'filesize'  8234435
                                           'mtime'  1620311044
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal (2011) 04 eid metal nu
                                      'tag_artist'  Alone
                                     'tag_release'  Several Quiet Moments (Remaster)
                                       'tag_title'  No Data
                                             'bpm'  119.476
                                    'search_title'  'data':2 'no':1
                                   'search_artist'  'alone':1
                                  'search_release'  'moments':3 'quiet':2 'remaster':4,5 'several':1
                                     'search_rest'  '00dwimp':1 '00metal':2 '2011':3,4 'eid':5 'metal':6 'nu':7
                                    'search_combo'  '00dwimp':9 '00metal':10 '2011':11,12 'alone':3B 'data':2A 'eid':13 'metal':14 'moments':6C 'no':1A 'nu':15 'quiet':5C 'remaster':7C,8C 'several':4C
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-4', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-1', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['polish', 'hardcore', 'melodic hardcore', 'nu metal', 'rock']
                                        'tag_date'  2011
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620311044.4994898  (2021-05-06 16:24:04)
                             'size'  8234435