======================== unified (from filesystem) ========================
                                         'bitrate'  '24.0'
                                        'duration'  '2464'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
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 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'nonmusic-speech-instruction'
                                             'bpm'  '131.243'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '131.243'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-instruction'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.01 dB'
'TXXX:replaygain_track_peak'                        '0.502890'

========================== row from database ==========================
                                              'id'  433243
                                            'path'  /data/Music/Bulk/0nonmusic/Tara Brach/Radical Self-Acceptance (Buddhist Psychology Selfhelp)/Tara Brach - Radical Self-Acceptance 4 of 4.mp3
                                         'working'  None
                                         'bitrate'  24
                                    'duration_sec'  2464
                                           'genre'  nonmusic-speech-instruction
                                        'filesize'  7394589
                                           'mtime'  1620562225
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic Tara Brach Radical Self Acceptance (Buddhist Psychology Selfhelp) Tara Brach Radical Self Acceptance 4 of 4 nonmusic speech instruction
                                      'tag_artist'  [unknown]
                                     'tag_release'  None
                                       'tag_title'  
                                             'bpm'  131.243
                                    'search_title'  None
                                   'search_artist'  'unknown':1,2
                                  'search_release'  
                                     'search_rest'  '0nonmusic':1 '4':12 'acceptance':6 'brach':3 'buddhist':7,8 'instruction':16 'nonmusic':14 'of':13 'psychology':9 'radical':4 'self':5 'selfhelp':10,11 'speech':15 'tara':2
                                    'search_combo'  '0nonmusic':3 '4':14 'acceptance':8 'brach':5 'buddhist':9,10 'instruction':18 'nonmusic':16 'of':15 'psychology':11 'radical':6 'self':7 'selfhelp':12,13 'speech':17 'tara':4 'unknown':1B,2B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-piano-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['mysterious', 'unknown', 'all', 'mistagged artist', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562224.9206202  (2021-05-09 14:10:24)
                             'size'  7394589