======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '269'
                                          'artist'  'Robotron'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Zone Of Possible Agreement (2003)'
                                           'quals'  ("['Q-MIXBEAT-3', 'Q-HAP-2', 'Q-UNU-1', 'q-syn-4', 'q-bass-3', 'q-busy-3', "
 "'q-grit-2', 'q-play-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'q-chart-1', 'q-drums-4', "
 "'q-other-2', 'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['all', 'electro punk', 'berlin', 'electronic', 'theremin']"
                                     'discogstags'  "['punk', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno-minimal or deephouse'
                                             'bpm'  '133.4'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '133.4'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno-minimal or deephouse'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Zone Of Possible Agreement (2003)'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Robotron'
'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'                                  ['punk', 'rock']
'TXXX:lastfmtags'                                   ['all', 'electro punk', 'berlin', 'electronic', 'theremin']
'TXXX:other'                                        '15992027'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.37 dB'
'TXXX:replaygain_track_peak'                        '0.851685'

========================== row from database ==========================
                                              'id'  857595
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/soundcloud/zzzzra/Robotron - Zone Of Possible Agreement (2003)-15992027.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  269
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  4317138
                                           'mtime'  1621085098
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm soundcloud zzzzra 15992027 electronic th techno minimal or deephouse
                                      'tag_artist'  Robotron
                                     'tag_release'  None
                                       'tag_title'  Zone Of Possible Agreement (2003)
                                             'bpm'  133.4
                                    'search_title'  '2003':5,6 'agreement':4 'of':2 'possible':3 'zone':1
                                   'search_artist'  'robotron':1
                                  'search_release'  
                                     'search_rest'  '15992027':3 'deephouse':9 'electronic':4 'minimal':7 'or':8 'soundcloud':1 'techno':6 'th':5 'zzzzra':2
                                    'search_combo'  '15992027':10 '2003':5A,6A 'agreement':4A 'deephouse':16 'electronic':11 'minimal':14 'of':2A 'or':15 'possible':3A 'robotron':7B 'soundcloud':8 'techno':13 'th':12 'zone':1A 'zzzzra':9
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           '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-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['all', 'electro punk', 'berlin', 'electronic', 'theremin']
                                        'tag_date'  2000
                                     'discogstags'  ['punk', 'rock']

============================== file details ==============================
                                           'mtime'  1621085098.3950353  (2021-05-15 15:24:58)
                             'size'  4317138