======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '80'
                                          'artist'  'Opuswerk'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'B1'
                                           '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-3', 'q-busy-3', 'q-grit-2', "
 "'q-play-3', 'q-chart-1', 'q-drums-4', 'q-other-1', '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'  '132.0'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '132.0'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno-minimal or deephouse'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'B1'
'TKEY' (Initial key)                                '8B'
'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:other'                                        ' Gonzalo MD - Sharp Oscillation-257801973'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-3.24 dB'
'TXXX:replaygain_track_peak'                        '0.627871'

========================== row from database ==========================
                                              'id'  857832
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/soundcloud/opuswerk/KW 019 - B1 - Gonzalo MD - Sharp Oscillation-257801973.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  80
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  1292328
                                           'mtime'  1621084993
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm soundcloud opuswerk KW 019 Gonzalo MD Sharp Oscillation 257801973 electronic th techno minimal or deephouse
                                      'tag_artist'  Opuswerk
                                     'tag_release'  None
                                       'tag_title'  B1
                                             'bpm'  132.0
                                    'search_title'  'b1':1
                                   'search_artist'  'opuswerk':1
                                  'search_release'  
                                     'search_rest'  '257801973':8 'deephouse':14 'electronic':9 'gonzalo':4 'kw':3 'md':5 'minimal':12 'opuswerk':2 'or':13 'oscillation':7 'sharp':6 'soundcloud':1 'techno':11 'th':10
                                    'search_combo'  '257801973':10 'b1':1A 'deephouse':16 'electronic':11 'gonzalo':6 'kw':5 'md':7 'minimal':14 'opuswerk':2B,4 'or':15 'oscillation':9 'sharp':8 'soundcloud':3 'techno':13 'th':12
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8B
                                           '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-4', 'q-syn-4', 'q-chart-1', 'q-other-1', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['minimal techno', 'techno', 'neotrance', 'minimal', 'ambient']
                                        'tag_date'  2010
                                     'discogstags'  ['techno', 'electronic']

============================== file details ==============================
                                           'mtime'  1621084993.2541115  (2021-05-15 15:23:13)
                             'size'  1292328