<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '161'
                                          'artist'  'Эдуард Хиль'
                                     'text_people'  ''
                                         'release'  "I Am Very Glad, Because I'm Finally Returning Back Home (Trololo)"
                                           'title'  "I Am Very Glad, Because I'm Finally Returning Back Home (Trololo)"
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'Q-SYN-3', 'Q-BUSY-3', 'Q-GRIT-2', 'Q-PLAY-2', 'q-bass-3', "
 "'Q-CHART-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'Q-MIXBEAT-2']")
                                      'lastfmtags'  "['retro', 'russian', 'soviet', 'trololo', 'pop']"
                                     'discogstags'  "['vocal', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '1'
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'loc-russia'
                                             'bpm'  '128.5'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382dac40>

'APIC:'                                             type PictureType.OTHER (Other) b''<br/>                                     <img style="width:150px" src="image?fid=1527823"/>
'TALB' (Album/Movie/Show title)                     "I Am Very Glad, Because I'm Finally Returning Back Home (Trololo)"
'TBPM' (BPM (beats per minute))                     '128.5'
'TCON' (Content type, a.k.a. Genre)                 'loc-russia'
'TDRC' (Recording time)                             '2010'
'TIT1' (Content group description)                  'Russia'
'TIT2' (Title/songname/content description)         "I Am Very Glad, Because I'm Finally Returning Back Home (Trololo)"
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Эдуард Хиль'
'TRCK' (Track number/Position in set)               '1/1'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['vocal', 'pop']
'TXXX:lastfmtags'                                   ['retro', 'russian', 'soviet', 'trololo', 'pop']
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-4.91 dB'
'TXXX:replaygain_track_peak'                        '0.991116'

========================== row from database ==========================
                                              'id'  1527823
                                            'path'  /data/Music/Bulk/00localcharacter/I Am Very Glad, Because I_m Finally Retu/01 I Am Very Glad, Because I_m Final.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  161
                                           'genre'  loc-russia
                                        'filesize'  6544664
                                           'mtime'  1638545079
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter I_m 01 I_m loc russia
                                      'tag_artist'  Эдуард Хиль
                                     'tag_release'  I Am Very Glad, Because I'm Finally Returning Back Home (Trololo)
                                       'tag_title'  I Am Very Glad, Because I'm Finally Returning Back Home (Trololo)
                                             'bpm'  128.5
                                    'search_title'  'am':2 'back':12 'because':6 'finally':10 'glad':4,5 'home':13 'i':1,7 'im':9 'm':8 'returning':11 'trololo':14,15 'very':3
                                   'search_artist'  'eduard':2 'xil':4,5 'хиль':3 'эдуард':1
                                  'search_release'  'am':2 'back':12 'because':6 'finally':10 'glad':4,5 'home':13 'i':1,7 'im':9 'm':8 'returning':11 'trololo':14,15 'very':3
                                     'search_rest'  'i':1 'loc':3 'm':2 'russia':4
                                    'search_combo'  'am':2A,22C 'back':12A,32C 'because':6A,26C 'eduard':17B 'finally':10A,30C 'glad':4A,5A,24C,25C 'home':13A,33C 'i':1A,7A,21C,27C,36 'im':9A,29C 'loc':38 'm':8A,28C,37 'returning':11A,31C 'russia':39 'trololo':14A,15A,34C,35C 'very':3A,23C 'xil':19B,20B 'хиль':18B 'эдуард':16B
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-2', 'Q-GRIT-2', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-1', 'Q-SYN-3', 'q-other-3', 'Q-BUSY-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3']
                                      'lastfmtags'  ['retro', 'russian', 'soviet', 'trololo', 'pop']
                                        'tag_date'  2010
                                     'discogstags'  ['vocal', 'pop']

============================== file details ==============================
                                           'mtime'  1638545078.946956  (2021-12-03 16:24:38)
                             'size'  6544664