<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '412'
                                          'artist'  'Joachim Holm &amp; Alejandro Mosso'
                                     'text_people'  ''
                                         'release'  'Beatport: Top 100 - February 2016 (Indie Dance / Nu Disco)'
                                           'title'  'Tre Melodi (Prins Thomas Version)'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['space disco', 'balearic', 'balaeric']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2015'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '122.01'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1359204"/>
'COMM:iTunes_CDDB_1:eng'                            '4C0B6707+219081+7+150+26472+54339+79519+110436+148526+162922'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '4'
'TALB' (Album/Movie/Show title)                     'Beatport: Top 100 - February 2016 (Indie Dance / Nu Disco)'
'TBPM' (BPM (beats per minute))                     '122.01'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TDRC' (Recording time)                             '2015'
'TIT2' (Title/songname/content description)         'Tre Melodi (Prins Thomas Version)'
'TKEY' (Initial key)                                '12A'
'TLEN' (Length)                                     '412226'
'TPE1' (Lead performer(s)/Soloist(s))               'Joachim Holm &amp; Alejandro Mosso'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME 32bits version 3.99.5 (http://lame.sf.net)'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['space disco', 'balearic', 'balaeric']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.33 dB'
'TXXX:replaygain_track_peak'                        '0.601194'

========================== row from database ==========================
                                              'id'  1359204
                                            'path'  /data/Music/Bulk/00poprockelectronic/Marvin & Guy - 2015-2016/Joachim Holm & Alejandro Mosso - Tre Melodi (Prins Thomas Version).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  412
                                           'genre'  electronic-unsorted
                                        'filesize'  16703554
                                           'mtime'  1620571032
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Marvin Guy 2015 electronic unsorted
                                      'tag_artist'  Joachim Holm & Alejandro Mosso
                                     'tag_release'  Beatport: Top 100 - February 2016 (Indie Dance / Nu Disco)
                                       'tag_title'  Tre Melodi (Prins Thomas Version)
                                             'bpm'  122.01
                                    'search_title'  'melodi':2 'prins':3,4 'thomas':5 'tre':1 'version':6,7
                                   'search_artist'  'alejandro':3 'holm':2 'joachim':1 'mosso':4
                                  'search_release'  '100':4 '2016':6 'beatport':1,2 'dance':9 'disco':11,12 'february':5 'indie':7,8 'nu':10 'top':3
                                     'search_rest'  '00poprockelectronic':1 '2015':4 'electronic':5 'guy':3 'marvin':2 'unsorted':6
                                    'search_combo'  '00poprockelectronic':24 '100':15C '2015':27 '2016':17C 'alejandro':10B 'beatport':12C,13C 'dance':20C 'disco':22C,23C 'electronic':28 'february':16C 'guy':26 'holm':9B 'indie':18C,19C 'joachim':8B 'marvin':25 'melodi':2A 'mosso':11B 'nu':21C 'prins':3A,4A 'thomas':5A 'top':14C 'tre':1A 'unsorted':29 'version':6A,7A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['space disco', 'balearic', 'balaeric']
                                        'tag_date'  2015
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620571032.2663176  (2021-05-09 16:37:12)
                             'size'  16703554