======================== unified (from filesystem) ========================
                                         'bitrate'  '218.73'
                                        'duration'  '166'
                                          'artist'  'chet atkins + Hank Snow'
                                     'text_people'  ''
                                         'release'  'origina=Carter family(20s)'
                                           'title'  'Wildwood Flower'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '145.476'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'origina=Carter family(20s)'
'TBPM' (BPM (beats per minute))                     '145.476'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'Wildwood Flower'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'chet atkins + Hank Snow'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+0.79 dB'
'TXXX:replaygain_track_peak'                        '0.845260'

========================== row from database ==========================
                                              'id'  967981
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Chet Atkins, Hank Snow - wildwood flower.wma.mp3
                                         'working'  None
                                         'bitrate'  218
                                    'duration_sec'  166
                                           'genre'  loc-namerica-country
                                        'filesize'  4555793
                                           'mtime'  1621628042
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Chet Atkins, wildwood flower.wma loc namerica country
                                      'tag_artist'  chet atkins + Hank Snow
                                     'tag_release'  origina=Carter family(20s)
                                       'tag_title'  Wildwood Flower
                                             'bpm'  145.476
                                    'search_title'  'flower':2 'wildwood':1
                                   'search_artist'  'atkins':2 'chet':1 'hank':3 'snow':4
                                  'search_release'  '20s':4 'carter':2 'family':3 'family20s':5 'origina':1
                                     'search_rest'  'atkins':8,9 'chet':7 'country':4 'exotica':2 'flower':11 'flowerwma':13 'jazz':1 'loc':14 'music':6 'namerica':15 'old':5 'oldies':3 'wildwood':10 'wma':12
                                    'search_combo'  '20s':10C 'atkins':4B,19,20 'carter':8C 'chet':3B,18 'country':15 'exotica':13 'family':9C 'family20s':11C 'flower':2A,22 'flowerwma':24 'hank':5B 'jazz':12 'loc':25 'music':17 'namerica':26 'old':16 'oldies':14 'origina':7C 'snow':6B 'wildwood':1A,21 'wma':23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           '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-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628042.3988268  (2021-05-21 22:14:02)
                             'size'  4555793