======================== unified (from filesystem) ========================
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                                        'duration'  '302'
                                          'artist'  'Christine Lavin'
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                                           'title'  'Sometimes Mother Really Does Know Best'
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                                      'lastfmtags'  ("['female vocalists', 'female singer songwriters', 'songs with place names', "
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                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  ''
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                                             'bpm'  '142.708'
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rest: ''

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

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'TBPM' (BPM (beats per minute))                     '142.708'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TIT2' (Title/songname/content description)         'Sometimes Mother Really Does Know Best'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Christine Lavin'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['female vocalists',
 'female singer songwriters',
 'songs with place names',
 'title is a full sentence',
 'folk',
 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.32 dB'
'TXXX:replaygain_track_peak'                        '0.577110'

========================== row from database ==========================
                                              'id'  1345545
                                            'path'  /data/Music/Bulk/00poprockelectronic/Clean/15 christine lavin - sometimes mother really does know best.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  302
                                           'genre'  ifs-songwriter
                                        'filesize'  12114643
                                           'mtime'  1637330719
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Clean 15 christine lavin sometimes mother really does know best ifs songwriter
                                      'tag_artist'  Christine Lavin
                                     'tag_release'  Dr. Demento's Basement Tapes 12
                                       'tag_title'  Sometimes Mother Really Does Know Best
                                             'bpm'  142.708
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                                   'search_artist'  'christine':1 'lavin':2
                                  'search_release'  'basement':6 'demento':3 'dementos':5 'dr':1,2 's':4 'tapes':7
                                     'search_rest'  '00poprockelectronic':1 'best':10 'christine':3 'clean':2 'does':8 'ifs':11 'know':9 'lavin':4 'mother':6 'really':7 'sometimes':5 'songwriter':12
                                    'search_combo'  '00poprockelectronic':16 'basement':14C 'best':6A,25 'christine':7B,18 'clean':17 'demento':11C 'dementos':13C 'does':4A,23 'dr':9C,10C 'ifs':26 'know':5A,24 'lavin':8B,19 'mother':2A,21 'really':3A,22 's':12C 'sometimes':1A,20 'songwriter':27 'tapes':15C
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['female vocalists', 'female singer songwriters', 'songs with place names', 'title is a full sentence', 'folk', 'singer songwriter']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637330718.9058545  (2021-11-19 15:05:18)
                             'size'  12114643