======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '293'
                                          'artist'  'Jeff Mills'
                                     'text_people'  ''
                                         'release'  'Waveform transmission vol.1'
                                           'title'  'changes of life'
                                           'quals'  ("['Q-MIXBEAT-3', 'Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'Q-OLDST-3', 'Q-PLAY-2', 'q-syn-4', 'q-bass-1', 'q-busy-3', "
 "'q-grit-2', 'q-chart-2', 'q-drums-4', 'q-other-3', 'q-vocals-1', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['detroit techno', 'techno', 'electronic', 'detroit', 'minimal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '03'
                                      'tracktotal'  ''
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno-minimal or deephouse'
                                             'bpm'  '136.6'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Waveform transmission vol.1'
'TBPM' (BPM (beats per minute))                     '136.6'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno-minimal or deephouse'
'TDRC' (Recording time)                             '1992'
'TIT2' (Title/songname/content description)         'changes of life'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jeff Mills'
'TPE2' (Band/orchestra/accompaniment)               'Jeff Mills'
'TRCK' (Track number/Position in set)               '03'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['detroit techno', 'techno', 'electronic', 'detroit', 'minimal']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.80 dB'
'TXXX:replaygain_track_peak'                        '0.370031'

========================== row from database ==========================
                                              'id'  1357122
                                            'path'  /data/Music/Bulk/00poprockelectronic/Jeff Mills/Mills, Jeff -  waveform transmission vol. 1/Mills, Jeff - Waveform transmission vol.1 - 03 - changes of life.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  293
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  7051155
                                           'mtime'  1621085242
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Mills, waveform Mills, 03 electronic th techno minimal deephouse
                                      'tag_artist'  Jeff Mills
                                     'tag_release'  Waveform transmission vol.1
                                       'tag_title'  changes of life
                                             'bpm'  136.6
                                    'search_title'  'changes':1 'life':3 'of':2
                                   'search_artist'  'jeff':1 'mills':2
                                  'search_release'  '1':4 'transmission':2 'vol':3 'vol1':5 'waveform':1
                                     'search_rest'  '00poprockelectronic':1 'deephouse':9 'electronic':5 'mills':2,3 'minimal':8 'techno':7 'th':6 'waveform':4
                                    'search_combo'  '00poprockelectronic':11 '1':9C 'changes':1A 'deephouse':19 'electronic':15 'jeff':4B 'life':3A 'mills':5B,12,13 'minimal':18 'of':2A 'techno':17 'th':16 'transmission':7C 'vol':8C 'vol1':10C 'waveform':6C,14
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'Q-MIXBEAT-3', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-4', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['detroit techno', 'techno', 'electronic', 'detroit', 'minimal']
                                        'tag_date'  1992
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621085242.180997  (2021-05-15 15:27:22)
                             'size'  7051155