======================== unified (from filesystem) ========================
                                         'bitrate'  '142.591'
                                        'duration'  '129'
                                          'artist'  'ROY ACUFF & Kitty Wells'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Can You Find It in Your Heart'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', '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'  "['female vocalists']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '84.210'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '84.210'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'Can You Find It in Your Heart'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'ROY ACUFF & Kitty Wells'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '129117'
'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'                                   'female vocalists'
'TXXX:q-bass'                                       '3'
'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'                        '+2.10 dB'
'TXXX:replaygain_track_peak'                        '0.431972'

========================== row from database ==========================
                                              'id'  966416
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Kitty Wells, Roy Acuff - Can You Find It In Your Heart 1950.wma.mp3
                                         'working'  None
                                         'bitrate'  142
                                    'duration_sec'  129
                                           'genre'  loc-namerica-country
                                        'filesize'  2308473
                                           'mtime'  1621628223
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Wells, Roy Acuff In 1950.wma loc namerica country
                                      'tag_artist'  ROY ACUFF & Kitty Wells
                                     'tag_release'  None
                                       'tag_title'  Can You Find It in Your Heart
                                             'bpm'  84.21
                                    'search_title'  'can':1 'find':3 'heart':7 'in':5 'it':4 'you':2 'your':6
                                   'search_artist'  'acuff':2 'kitty':3 'roy':1 'wells':4
                                  'search_release'  
                                     'search_rest'  '1950':12 '1950wma':14 'acuff':10 'country':4 'exotica':2 'in':11 'jazz':1 'loc':15 'music':6 'namerica':16 'old':5 'oldies':3 'roy':9 'wells':7,8 'wma':13
                                    'search_combo'  '1950':23 '1950wma':25 'acuff':9B,21 'can':1A 'country':15 'exotica':13 'find':3A 'heart':7A 'in':5A,22 'it':4A 'jazz':12 'kitty':10B 'loc':26 'music':17 'namerica':27 'old':16 'oldies':14 'roy':8B,20 'wells':11B,18,19 'wma':24 'you':2A 'your':6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           '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-3', 'q-grit-2']
                                      'lastfmtags'  ['female vocalists']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628223.2802804  (2021-05-21 22:17:03)
                             'size'  2308473