======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '308'
                                          'artist'  'Haris Alexiou'
                                     'text_people'  ''
                                         'release'  'plastictango tango'
                                           'title'  'Gina Ena Tango'
                                           '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-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['greek', 'female vocalists', 'folk', 'world', 'greek female vocalists']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '115.130'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'plastictango tango'
'TBPM' (BPM (beats per minute))                     '115.130'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TENC' (Encoded by)                                 'iTunes v4.6'
'TIT2' (Title/songname/content description)         'Gina Ena Tango'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Haris Alexiou'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:MP3GAIN_MINMAX'                               '106,194'
'TXXX:MP3GAIN_UNDO'                                 '+004,+004,N'
'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'                                   ['greek', 'female vocalists', 'folk', 'world', 'greek female vocalists']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.21 dB'
'TXXX:replaygain_track_peak'                        '0.526629'

========================== row from database ==========================
                                              'id'  245308
                                            'path'  /data/Music/Bulk/00localcharacter/plastictango/tango/tango 74.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  308
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  6168048
                                           'mtime'  1620528472
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 74 loc style or milonga
                                      'tag_artist'  Haris Alexiou
                                     'tag_release'  plastictango tango
                                       'tag_title'  Gina Ena Tango
                                             'bpm'  115.13
                                    'search_title'  'ena':2 'gina':1 'tango':3
                                   'search_artist'  'alexiou':2 'haris':1
                                  'search_release'  'plastictango':1 'tango':2
                                     'search_rest'  '74':1 'loc':2 'milonga':5 'or':4 'style':3
                                    'search_combo'  '74':8 'alexiou':5B 'ena':2A 'gina':1A 'haris':4B 'loc':9 'milonga':12 'or':11 'plastictango':6C 'style':10 'tango':3A,7C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['greek', 'female vocalists', 'folk', 'world', 'greek female vocalists']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528472.146035  (2021-05-09 04:47:52)
                             'size'  6168048