Question: I have tried the samples in your documentation for HARK but the BeamForming node cannot be found in the Ubuntu version of HARK. What might be the problem?
Answer: Since BeamForming is provided with another package, hark-sss, you need to install it beforehand:
apt-get install hark-sss
Then, in HARK Designer, click Preferences -> Packages and activate hark-sss package.