======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '118'
                                          'artist'  'Opuswerk'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'b2 RSF Renaissance (snippet)'
                                           'quals'  ("['Q-MIXBEAT-3', 'Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'Q-OLDST-3', 'q-syn-4', 'q-bass-4', 'q-busy-3', 'q-grit-2', "
 "'q-play-3', 'q-chart-1', 'q-drums-3', 'q-other-3', 'q-piano-1', "
 "'q-vocals-1']")
                                      'lastfmtags'  "['minimal techno', 'techno', 'neotrance', 'minimal', 'ambient']"
                                     'discogstags'  "['techno', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno-minimal or deephouse'
                                             'bpm'  '120.0'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '120.0'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno-minimal or deephouse'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'b2 RSF Renaissance (snippet)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Opuswerk'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['techno', 'electronic']
'TXXX:lastfmtags'                                   ['minimal techno', 'techno', 'neotrance', 'minimal', 'ambient']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.11 dB'
'TXXX:replaygain_track_peak'                        '0.466130'

========================== row from database ==========================
                                              'id'  857954
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/soundcloud/opuswerk/b2_RSF_Renaissance (snippet)-21182528.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  118
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  1892099
                                           'mtime'  1621084996
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm soundcloud opuswerk b2_RSF_Renaissance 21182528 electronic th techno minimal or deephouse
                                      'tag_artist'  Opuswerk
                                     'tag_release'  None
                                       'tag_title'  b2 RSF Renaissance (snippet)
                                             'bpm'  120.0
                                    'search_title'  'b2':1 'renaissance':3 'rsf':2 'snippet':4,5
                                   'search_artist'  'opuswerk':1
                                  'search_release'  
                                     'search_rest'  '21182528':6 'b2':3 'deephouse':12 'electronic':7 'minimal':10 'opuswerk':2 'or':11 'renaissance':5 'rsf':4 'soundcloud':1 'techno':9 'th':8
                                    'search_combo'  '21182528':12 'b2':1A,9 'deephouse':18 'electronic':13 'minimal':16 'opuswerk':6B,8 'or':17 'renaissance':3A,11 'rsf':2A,10 'snippet':4A,5A 'soundcloud':7 'techno':15 'th':14
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-4', 'q-chart-1', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['minimal techno', 'techno', 'neotrance', 'minimal', 'ambient']
                                        'tag_date'  2010
                                     'discogstags'  ['techno', 'electronic']

============================== file details ==============================
                                           'mtime'  1621084995.8701086  (2021-05-15 15:23:15)
                             'size'  1892099