======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '403'
                                          'artist'  ':ö:'
                                     'text_people'  ''
                                         'release'  'o ep'
                                           'title'  "'-'"
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-1']")
                                     'discogstags'  "['freestyle', 'electronic', 'non-music', 'chiptune', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '133.4'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'o ep'
'TBPM' (BPM (beats per minute))                     '133.4'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TIT2' (Title/songname/content description)         "'-'"
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               ':ö:'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['freestyle', 'electronic', 'non-music', 'chiptune', 'experimental']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.73 dB'
'TXXX:replaygain_track_peak'                        '0.350016'

========================== row from database ==========================
                                              'id'  948441
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/(sfr040)-o ep-03-track03.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  403
                                           'genre'  electronic-unsorted
                                        'filesize'  16130898
                                           'mtime'  1620515632
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm (sfr040) 03 track03 electronic unsorted
                                      'tag_artist'  :ö:
                                     'tag_release'  o ep
                                       'tag_title'  '-'
                                             'bpm'  133.4
                                    'search_title'  
                                   'search_artist'  'o':1,2,3,4
                                  'search_release'  'ep':2 'o':1
                                     'search_rest'  'electronic':4 'sfr040':1,2 'track03':3 'unsorted':5
                                    'search_combo'  'electronic':10 'ep':6C 'o':1B,2B,3B,4B,5C 'sfr040':7,8 'track03':9 'unsorted':11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  ['freestyle', 'electronic', 'non-music', 'chiptune', 'experimental']

============================== file details ==============================
                                           'mtime'  1620515631.6118746  (2021-05-09 01:13:51)
                             'size'  16130898