======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '192'
                                          'artist'  'Johnny Cash'
                                     'text_people'  ''
                                         'release'  'At Folsom Prison'
                                           'title'  'Jackson (With June Carter)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                                     'discogstags'  "['folk, world, & country', 'country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  ''
                                            'date'  '1968'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '125.083'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'At Folsom Prison'
'TBPM' (BPM (beats per minute))                     '125.083'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1968'
'TIT2' (Title/songname/content description)         'Jackson (With June Carter)'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TRCK' (Track number/Position in set)               '14'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['folk, world, & country', 'country']
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.32 dB'
'TXXX:replaygain_track_peak'                        '0.560122'

========================== row from database ==========================
                                              'id'  1352855
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/johnny cash - 14 - jackson (with june carter).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  192
                                           'genre'  loc-namerica-country
                                        'filesize'  4620307
                                           'mtime'  1621630238
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] johnny cash 14 jackson (with june carter) loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  At Folsom Prison
                                       'tag_title'  Jackson (With June Carter)
                                             'bpm'  125.083
                                    'search_title'  'carter':5,6 'jackson':1 'june':4 'with':2,3
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'at':1 'folsom':2 'prison':3
                                     'search_rest'  '00poprockelectronic':1 'carter':13,14 'cash':8 'country':17 'files':5,6 'jackson':9 'johnny':7 'june':12 'loc':15 'loose':3,4 'namerica':16 'unsorted':2 'with':10,11
                                    'search_combo'  '00poprockelectronic':12 'at':9C 'carter':5A,6A,24,25 'cash':8B,19 'country':28 'files':16,17 'folsom':10C 'jackson':1A,20 'johnny':7B,18 'june':4A,23 'loc':26 'loose':14,15 'namerica':27 'prison':11C 'unsorted':13 'with':2A,3A,21,22
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  1968
                                     'discogstags'  ['folk, world, & country', 'country']

============================== file details ==============================
                                           'mtime'  1621630237.6163578  (2021-05-21 22:50:37)
                             'size'  4620307