======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '154'
                                          'artist'  'Spade Cooley'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Chew Tabacco Rag'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['classic country', 'country', 'all', 'western swing']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '29'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-country'
                                             'bpm'  '85.525'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '85.525'
'TCON' (Content type, a.k.a. Genre)                 'prerock-country'
'TIT2' (Title/songname/content description)         'Chew Tabacco Rag'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Spade Cooley'
'TRCK' (Track number/Position in set)               '7/29'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.83.01, LAME dll 3.97, 128 Kbit/s, Joint Stereo, High quality'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['classic country', 'country', 'all', 'western swing']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.46 dB'
'TXXX:replaygain_track_peak'                        '0.504621'

========================== row from database ==========================
                                              'id'  1325417
                                            'path'  /data/Music/Bulk/00poprockelectronic/Clean/Spade Cooley - Chew Tabacco Rag.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  154
                                           'genre'  prerock-country
                                        'filesize'  2477069
                                           'mtime'  1621630152
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Clean prerock country
                                      'tag_artist'  Spade Cooley
                                     'tag_release'  None
                                       'tag_title'  Chew Tabacco Rag
                                             'bpm'  85.525
                                    'search_title'  'chew':1 'rag':3 'tabacco':2
                                   'search_artist'  'cooley':2 'spade':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'clean':2 'country':4 'prerock':3
                                    'search_combo'  '00poprockelectronic':6 'chew':1A 'clean':7 'cooley':5B 'country':9 'prerock':8 'rag':3A 'spade':4B 'tabacco':2A
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['classic country', 'country', 'all', 'western swing']
                                        'tag_date'  
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621630152.1584542  (2021-05-21 22:49:12)
                             'size'  2477069