======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '378'
                                          'artist'  "Diesel Boy - A Soldier's Story - 15 - Technical It"
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                                         'release'  ''
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 "'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-3']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '123.6'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '123.6'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               "Diesel Boy - A Soldier's Story - 15 - Technical It"
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.59 dB'
'TXXX:replaygain_track_peak'                        '0.699810'
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========================== row from database ==========================
                                              'id'  1499608
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/drumandbass/Diesel Boy - A Soldier_s Story.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  378
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  9074559
                                           'mtime'  1620559172
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat drumandbass Soldier_s electronic generic radio dance
                                      'tag_artist'  Diesel Boy - A Soldier's Story - 15 - Technical It
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  123.6
                                    'search_title'  None
                                   'search_artist'  'a':3 'boy':2 'diesel':1 'it':9 's':5 'soldier':4 'soldiers':6 'story':7 'technical':8
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'dance':3 'drumandbass':5 'electronic':8 'generic':2 'radio':9 's':7 'soldier':6 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':10 'a':3B 'boy':2B 'dance':12 'diesel':1B 'drumandbass':14 'electronic':17 'generic':11 'it':9B 'radio':18 's':5B,16 'soldier':4B,15 'soldiers':6B 'story':7B 'technical':8B 'trapbeat':13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-3', 'q-chart-3', 'q-other-1', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559171.8787344  (2021-05-09 13:19:31)
                             'size'  9074559