======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '196'
                                          'artist'  'Jacques  Brel'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Amsterdam'
                                           'quals'  ("['Q-GRIT-2', 'Q-BUSY-3', 'Q-PLAY-2', 'q-bass-3', 'Q-CHART-2', 'q-drums-1', "
 "'q-other-3', 'q-piano-1', 'q-vocals-4', 'Q-HAP-3', 'Q-SYN-1', 'Q-UNU-1', "
 "'Q-JZFKS-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', 'Q-MIXBEAT-1', 'Q-LOCALNESS-3']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-eur-france'
                                             'bpm'  '115.9'
                                             'key'  'F#m'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '115.9'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-france'
'TENC' (Encoded by)                                 'iTunes v4.2.0.72'
'TIT2' (Title/songname/content description)         'Amsterdam'
'TKEY' (Initial key)                                'F#m'
'TPE1' (Lead performer(s)/Soloist(s))               'Jacques  Brel'
'TRCK' (Track number/Position in set)               '12'
'TXXX:MusicMagic Data'                              'AgEBXSyViPem28tuhR3oLTGAiLGBKIVsCyKmlxT/gAH4bLM0gvMSsLS8hlnZcp0bhM+AAdRwpzHkYa5mhIOhOwcUC4i4M6/hgAKAAYxHoPDQaoYnD9w1PYEXgZ+EBP2wocgg2IE72YmpJoI3Cr2zPIQe2lqN+4gPgAG+2L4Z2geXb4CtruMIz/umsdynUoOVhcQ='
'TXXX:MusicMagic Fingerprint'                       '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'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-MIXBEAT'                                    '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:http://www.foosic.org/'                       '0000b64c00005f07311248010373b4100b33c8100f310454af730400cf37c8200fb200050333d4100fb7cc004b3b92b01bb50230026982705104c570b08801b0f0e03feef3e0c7ffe5f37fff78fbfc979de22aefd0f33f3efe7fcd4e0fb3ffffb7d7cf34f1b7f7f9e3c48cb532b3efeedcfb70fcf069b1c4f1fccbffb017ffbb30fffffeb1c73affc7433efc0bc38f3e1f50ffd43ffbefecfb33cecfc0e63ccfff53f3df7afb3bcfdff2ddfffbe8ffdbcdcb77fffd33ffcfeffff0ffff471bfdffff73fbf7fb23fc7ccff7ffe3c3ccfe79dfcdffc6cc3fe0fd3bfffefb437ffafd83bfc0142cb03bdf7ccfffbbf8e0fefff0ffecf6bf8fbc1a7f5f3c0f3effcf7ff3e3cedfefa3dd005fcfe810383f7f7dffcacd37bc83fd041c4e468bcc63cfc6ffff3ffdf32b5ae3d81fdff8e3a3fbbfe32f70f6ff1cface0f4fcfc3c47fef31c33fcfe2fffff3c6ffbb3ff8d33febc39b37ff3f4f3fd9320f1ffcbc3b7acbc5f790ddcefffbffffffdf7dffffffe7fe7bf3f336e39e0eef0df45d8e39336e4edf75f75fc7bdffdf5563df7c33bf4e38ee36f3cefb33763d5fb618339a393b0e575e6c38df75c0'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.56 dB'
'TXXX:replaygain_track_peak'                        '0.503081'

========================== row from database ==========================
                                              'id'  1495452
                                            'path'  /data/Music/Other/Pa/France/Jacques  Brel/12 Amsterdam.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  196
                                           'genre'  loc-eur-france
                                        'filesize'  3936484
                                           'mtime'  1621094187
                                   'redo_metaread'  0
                                        'rest_str'   Pa France 12 loc eur france
                                      'tag_artist'  Jacques  Brel
                                     'tag_release'  None
                                       'tag_title'  Amsterdam
                                             'bpm'  115.9
                                    'search_title'  'amsterdam':1
                                   'search_artist'  'brel':2 'jacques':1
                                  'search_release'  
                                     'search_rest'  'eur':4 'france':2 'loc':3 'pa':1
                                    'search_combo'  'amsterdam':1A 'brel':3B 'eur':7 'france':5 'jacques':2B 'loc':6 'pa':4
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  F#m
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'Q-MIXBEAT-1', 'Q-OLDST-2', 'Q-GRIT-2', 'Q-CHART-2', 'Q-JZFKS-1', 'Q-UNU-1', 'q-drums-1', 'Q-SYN-1', 'q-other-3', 'Q-BUSY-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621094186.79861  (2021-05-15 17:56:26)
                             'size'  3936484