fixed issue with cosine blending

[Matthijspals]

There was a mistake with the brackets (in line 614 of asr.py), it should be fixed now

[codecov]

Codecov Report

Merging #7 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #7   +/-   ##
=======================================
  Coverage   67.30%   67.30%           
=======================================
  Files          14       14           
  Lines        1838     1838           
=======================================
  Hits         1237     1237           
  Misses        601      601           

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[nbara]

Thanks @Matthijspals, good catch !

Let me know if you spot some more bugs in the ASR code as it's not been extensively tested on my part (yet)