======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '194'
                                          'artist'  'Quadro Nuevo'
                                     'text_people'  'Quadro Nuevo'
                                         'release'  'plastictango tango'
                                           'title'  'Luna Rossa'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['accordion', 'tango nuevo', 'jazz', 'tango', 'world']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga;mi-accordeon'
                                             'bpm'  '138.417'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000AD9 0000035F 00006B14'
'COMM:iTunNORM:eng'                                 (' 00000AD9 0000035F 00006B14 00004B1E 0002A263 0002A22F 00008583 000084F5 '
 '0002E053 0002E039')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000007B0 00000000008283C0 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '17+36B08AAEAE88A6DD76988668B3C3A887+628910'
'TALB' (Album/Movie/Show title)                     'plastictango tango'
'TBPM' (BPM (beats per minute))                     '138.417'
'TCOM' (Composer)                                   'Quadro Nuevo'
'TCON' (Content type, a.k.a. Genre)                 ['loc-style-tango or milonga', 'mi-accordeon']
'TDRC' (Recording time)                             '1998'
'TENC' (Encoded by)                                 'iTunes v6.0.5'
'TIT2' (Title/songname/content description)         'Luna Rossa'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Quadro Nuevo'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['accordion', 'tango nuevo', 'jazz', 'tango', 'world']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.51 dB'
'TXXX:replaygain_track_peak'                        '0.527796'

========================== row from database ==========================
                                              'id'  241044
                                            'path'  /data/Music/Bulk/00localcharacter/plastictango/tango/tango 44.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  194
                                           'genre'  loc-style-tango or milonga;mi-accordeon
                                        'filesize'  3106373
                                           'mtime'  1620528465
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 44 loc style or milonga;mi accordeon
                                      'tag_artist'  Quadro Nuevo
                                     'tag_release'  plastictango tango
                                       'tag_title'  Luna Rossa
                                             'bpm'  138.417
                                    'search_title'  'luna':1 'rossa':2
                                   'search_artist'  'nuevo':2 'quadro':1
                                  'search_release'  'plastictango':1 'tango':2
                                     'search_rest'  '44':1 'accordeon':9 'loc':2 'mi':6,8 'milonga':5,7 'or':4 'style':3
                                    'search_combo'  '44':7 'accordeon':15 'loc':8 'luna':1A 'mi':12,14 'milonga':11,13 'nuevo':4B 'or':10 'plastictango':5C 'quadro':3B 'rossa':2A 'style':9 'tango':6C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['accordion', 'tango nuevo', 'jazz', 'tango', 'world']
                                        'tag_date'  1998
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528465.1572027  (2021-05-09 04:47:45)
                             'size'  3106373