======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '192'
                                          'artist'  'The Moog Machine'
                                     'text_people'  ''
                                         'release'  'Switched-On Rock'
                                           'title'  'Aquarius / Let the Sunshine In'
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                                      'lastfmtags'  "['instrumental', 'electronica', 'electronic', 'cover', 'moog']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '10'
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-early;mi-earlysynth-moog'
                                             'bpm'  '117.6'
                                             'key'  '2A'
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rest: ''

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'TBPM' (BPM (beats per minute))                     '117.6'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-early', 'mi-earlysynth-moog']
'TDOR' (Original release time)                      '1969'
'TDRC' (Recording time)                             '1969'
'TENC' (Encoded by)                                 'Basic Hip Digital Oddio'
'TIT2' (Title/songname/content description)         'Aquarius / Let the Sunshine In'
'TKEY' (Initial key)                                '2A'
'TMED' (Media type)                                 '12" Vinyl'
'TPE1' (Lead performer(s)/Soloist(s))               'The Moog Machine'
'TPE2' (Band/orchestra/accompaniment)               'The Moog Machine'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Columbia'
'TRCK' (Track number/Position in set)               '8/10'
'TSO2'                                              'Moog Machine, The'
'TSOP' (Performer sort order)                       'Moog Machine, The'
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'TXXX:MusicBrainz Album Id'                         '726635de-6aef-4443-a452-80695fae37d2'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
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'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['instrumental', 'electronica', 'electronic', 'cover', 'moog']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.16 dB'
'TXXX:replaygain_track_peak'                        '0.502765'
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========================== row from database ==========================
                                              'id'  759744
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Early Moog & Synthesizer Music/[1969] The Moog Machine - Switched-On Rock/08. Aquarius  Let The Sunshine In.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  192
                                           'genre'  electronic-experimental-early;mi-earlysynth-moog
                                        'filesize'  7710934
                                           'mtime'  1636920451
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Early & Synthesizer Music [1969] 08. electronic experimental early;mi earlysynth moog
                                      'tag_artist'  The Moog Machine
                                     'tag_release'  Switched-On Rock
                                       'tag_title'  Aquarius / Let the Sunshine In
                                             'bpm'  117.6
                                    'search_title'  'aquarius':1 'in':5 'let':2 'sunshine':4 'the':3
                                   'search_artist'  'machine':3 'moog':2 'the':1
                                  'search_release'  'on':2 'rock':4 'switched':1 'switchedon':3
                                     'search_rest'  '08':6,7 '1969':4,5 'early':1,10,12 'earlysynth':14 'electronic':8 'experimental':9 'mi':11,13 'moog':15 'music':3 'synthesizer':2
                                    'search_combo'  '08':18,19 '1969':16,17 'aquarius':1A 'early':13,22,24 'earlysynth':26 'electronic':20 'experimental':21 'in':5A 'let':2A 'machine':8B 'mi':23,25 'moog':7B,27 'music':15 'on':10C 'rock':12C 'sunshine':4A 'switched':9C 'switchedon':11C 'synthesizer':14 'the':3A,6B
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'electronica', 'electronic', 'cover', 'moog']
                                        'tag_date'  1969
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636920451.1375234  (2021-11-14 21:07:31)
                             'size'  7710934