======================== unified (from filesystem) ========================
                                         'bitrate'  '211.78'
                                        'duration'  '172'
                                          'artist'  'Bill Monroe'
                                     'text_people'  ''
                                         'release'  'Old Country Music'
                                           'title'  "It's Mighty Dark To Travel"
                                           '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'traditional country', 'bluegrass', 'americana', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '101.158'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Old Country Music'
'TBPM' (BPM (beats per minute))                     '101.158'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         "It's Mighty Dark To Travel"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bill Monroe'
'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:lastfmtags'                                   ['country', 'traditional country', 'bluegrass', 'americana', 'folk']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.90 dB'
'TXXX:replaygain_track_peak'                        '0.623932'

========================== row from database ==========================
                                              'id'  1507003
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Bill Monroe - It_s Mighty Dark to Travel.wma.mp3
                                         'working'  None
                                         'bitrate'  211
                                    'duration_sec'  172
                                           'genre'  loc-namerica-country
                                        'filesize'  4560437
                                           'mtime'  1621628015
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country It_s to Travel.wma loc namerica country
                                      'tag_artist'  Bill Monroe
                                     'tag_release'  Old Country Music
                                       'tag_title'  It's Mighty Dark To Travel
                                             'bpm'  101.158
                                    'search_title'  'dark':5 'it':1 'its':3 'mighty':4 's':2 'to':6 'travel':7
                                   'search_artist'  'bill':1 'monroe':2
                                  'search_release'  'country':2 'music':3 'old':1
                                     'search_rest'  'country':4 'exotica':2 'it':5 'jazz':1 'loc':11 'namerica':12 'oldies':3 's':6 'to':7 'travel':8 'travelwma':10 'wma':9
                                    'search_combo'  'bill':8B 'country':11C,16 'dark':5A 'exotica':14 'it':1A,17 'its':3A 'jazz':13 'loc':23 'mighty':4A 'monroe':9B 'music':12C 'namerica':24 'old':10C 'oldies':15 's':2A,18 'to':6A,19 'travel':7A,20 'travelwma':22 'wma':21
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'traditional country', 'bluegrass', 'americana', 'folk']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628014.9490733  (2021-05-21 22:13:34)
                             'size'  4560437