======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '232'
                                          'artist'  'Johnny Cash'
                                     'text_people'  'Ewan MacColl'
                                         'release'  'American IV: The Man Comes Around'
                                           'title'  'The First Time Ever I Saw Your Face'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
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                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                                     'discogstags'  "['rock', 'folk, world, & country', 'country rock', 'acoustic', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '141.2'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'American IV: The Man Comes Around'
'TBPM' (BPM (beats per minute))                     '141.2'
'TCOM' (Composer)                                   'Ewan MacColl'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'The First Time Ever I Saw Your Face'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TPE2' (Band/orchestra/accompaniment)               'Johnny Cash'
'TPUB' (Publisher)                                  'Universal International'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'folk, world, & country', 'country rock', 'acoustic', 'folk']
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.35 dB'
'TXXX:replaygain_track_peak'                        '0.480338'

========================== row from database ==========================
                                              'id'  1383856
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Johnny Cash_/American IV - The Man Comes Around/06 - the first time ever i saw your.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  232
                                           'genre'  loc-namerica-country
                                        'filesize'  5587646
                                           'mtime'  1621630276
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Cash_ 06 the first time ever saw your loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  American IV: The Man Comes Around
                                       'tag_title'  The First Time Ever I Saw Your Face
                                             'bpm'  141.2
                                    'search_title'  'ever':4 'face':8 'first':2 'i':5 'saw':6 'the':1 'time':3 'your':7
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'american':1 'around':7 'comes':6 'iv':2,3 'man':5 'the':4
                                     'search_rest'  '00singer':1 'cash':4 'country':13 'eos':3 'ever':8 'first':6 'loc':11 'namerica':12 'saw':9 'songwriter':2 'the':5 'time':7 'your':10
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                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  2002
                                     'discogstags'  ['rock', 'folk, world, & country', 'country rock', 'acoustic', 'folk']

============================== file details ==============================
                                           'mtime'  1621630276.0405142  (2021-05-21 22:51:16)
                             'size'  5587646