======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '329'
                                          'artist'  'Karen Matheson'
                                     'text_people'  ''
                                         'release'  'Celtic Voices'
                                           'title'  "Mi Le M'uilinn"
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'Q-PLAY-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-2', 'q-drums-1', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['new age', 'celtic', 'female vocalists', 'folk', 'scottish']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-eur-northern'
                                             'bpm'  '143.517'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Celtic Voices'
'TBPM' (BPM (beats per minute))                     '143.517'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-northern'
'TIT2' (Title/songname/content description)         "Mi Le M'uilinn"
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Karen Matheson'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['new age', 'celtic', 'female vocalists', 'folk', 'scottish']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.24 dB'
'TXXX:replaygain_track_peak'                        '0.531709'

========================== row from database ==========================
                                              'id'  923343
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/Capercaillie/cifs1b9f.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  329
                                           'genre'  loc-eur-northern
                                        'filesize'  7906278
                                           'mtime'  1621629506
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe Capercaillie cifs1b9f loc eur northern
                                      'tag_artist'  Karen Matheson
                                     'tag_release'  Celtic Voices
                                       'tag_title'  Mi Le M'uilinn
                                             'bpm'  143.517
                                    'search_title'  'le':2 'm':3 'mi':1 'muilinn':5 'uilinn':4
                                   'search_artist'  'karen':1 'matheson':2
                                  'search_release'  'celtic':1 'voices':2
                                     'search_rest'  '00mid':1 'capercaillie':4 'cifs1b9f':5 'eur':7 'europe':3 'loc':6 'north':2 'northern':8
                                    'search_combo'  '00mid':10 'capercaillie':13 'celtic':8C 'cifs1b9f':14 'eur':16 'europe':12 'karen':6B 'le':2A 'loc':15 'm':3A 'matheson':7B 'mi':1A 'muilinn':5A 'north':11 'northern':17 'uilinn':4A 'voices':9C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['new age', 'celtic', 'female vocalists', 'folk', 'scottish']
                                        'tag_date'  
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621629506.1532712  (2021-05-21 22:38:26)
                             'size'  7906278