======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '172'
                                          'artist'  'Sam & Dave'
                                     'text_people'  ''
                                         'release'  "Hold On, I'm Comin'"
                                           'title'  "It's A Wonder"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-UNU-1', 'Q-JZFKS-3', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['oldies', 'funk', 'rhythm and blues', 'soul', '60s']"
                                     'discogstags'  "['funk / soul', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1966'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '116.789'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'APIC:thumbnail'                                    type PictureType.COVER_FRONT (Cover (front)) b'thumbnail'
                                     
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     "Hold On, I'm Comin'"
'TBPM' (BPM (beats per minute))                     '116.789'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TIT2' (Title/songname/content description)         "It's A Wonder"
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Sam & Dave'
'TRCK' (Track number/Position in set)               '7'
'TXXX:DATE'                                         '1966'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['funk / soul', 'soul']
'TXXX:lastfmtags'                                   ['oldies', 'funk', 'rhythm and blues', 'soul', '60s']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.85 dB'
'TXXX:replaygain_track_peak'                        '0.743597'

========================== row from database ==========================
                                              'id'  1525835
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/Sam & Dave - Hold On I_m Coming/07 - It_s A Wonder.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  172
                                           'genre'  funk or soul
                                        'filesize'  2776140
                                           'mtime'  1628357897
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul I_m Coming 07 It_s funk or soul
                                      'tag_artist'  Sam & Dave
                                     'tag_release'  Hold On, I'm Comin'
                                       'tag_title'  It's A Wonder
                                             'bpm'  116.789
                                    'search_title'  'a':4 'it':1 'its':3 's':2 'wonder':5
                                   'search_artist'  'dave':2 'sam':1
                                  'search_release'  'comin':7,8 'hold':1 'i':4 'im':6 'm':5 'on':2,3
                                     'search_rest'  'coming':6 'funk':2 'i':4 'it':7 'm':5 'or':9 's':8 'soul':3 'swing':1
                                    'search_combo'  'a':4A 'comin':14C,15C 'coming':21 'dave':7B 'funk':17 'hold':8C 'i':11C,19 'im':13C 'it':1A,22 'its':3A 'm':12C,20 'on':9C,10C 'or':24 's':2A,23 'sam':6B 'soul':18 'swing':16 'wonder':5A
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'funk', 'rhythm and blues', 'soul', '60s']
                                        'tag_date'  1966
                                     'discogstags'  ['funk / soul', 'soul']

============================== file details ==============================
                                           'mtime'  1628357896.6481762  (2021-08-07 19:38:16)
                             'size'  2776140