======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '3013'
                                          'artist'  'Nature Sounds'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Rainshowers'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['nature', 'field recording', 'field recordings', 'sleep', 'ambient']"
                                     'discogstags'  "['new age', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'nonmusic-fragments-sounds and sfx'
                                             'bpm'  '117.808'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'PCNT' (Play counter)                               PCNT(count=0)
'TBPM' (BPM (beats per minute))                     '117.808'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-fragments-sounds and sfx'
'TIT2' (Title/songname/content description)         'Rainshowers'
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '3013773'
'TPE1' (Lead performer(s)/Soloist(s))               'Nature Sounds'
'TRCK' (Track number/Position in set)               '00'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['new age', 'electronic']
'TXXX:lastfmtags'                                   ['nature', 'field recording', 'field recordings', 'sleep', 'ambient']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.84 dB'
'TXXX:replaygain_track_peak'                        '0.930676'

========================== row from database ==========================
                                              'id'  654218
                                            'path'  /data/Music/Bulk/0nonmusic/The Natural Sounds of the Wilderness 10 CDs collectionEchoes of Nature - Wilderness River/Rainshowers_Nature Sounds.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  3013
                                           'genre'  nonmusic-fragments-sounds and sfx
                                        'filesize'  48222416
                                           'mtime'  1636404241
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic The Natural of the Wilderness 10 CDs collectionEchoes of Wilderness River Rainshowers_Nature nonmusic fragments sounds and sfx
                                      'tag_artist'  Nature Sounds
                                     'tag_release'  None
                                       'tag_title'  Rainshowers
                                             'bpm'  117.808
                                    'search_title'  'rainshowers':1
                                   'search_artist'  'nature':1 'sounds':2
                                  'search_release'  
                                     'search_rest'  '0nonmusic':1 'and':14 'cds':6 'collection':16 'collectionechoes':7 'echoes':17 'fragments':12 'natural':3 'nature':10 'nonmusic':11 'of':4 'rainshowers':9 'river':8 'sfx':15 'sounds':13 'the':2 'wilderness':5
                                    'search_combo'  '0nonmusic':4 'and':17 'cds':9 'collection':19 'collectionechoes':10 'echoes':20 'fragments':15 'natural':6 'nature':2B,13 'nonmusic':14 'of':7 'rainshowers':1A,12 'river':11 'sfx':18 'sounds':3B,16 'the':5 'wilderness':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['nature', 'field recording', 'field recordings', 'sleep', 'ambient']
                                        'tag_date'  
                                     'discogstags'  ['new age', 'electronic']

============================== file details ==============================
                                           'mtime'  1636404240.9815624  (2021-11-08 21:44:00)
                             'size'  48222416