How to Build Audacity on Ubuntu 18.04 LTS

Audacity is a great alternative to Adobe Audition. Here is how to build Audacity on Ubuntu 18.04 LTS, since there is no binary.

First, clone the git repo
$ git clone https://github.com/audacity/audacity.git
$ cd audacity

Next, install necessary packages:
$ sudo apt-get install -y libwxbase3.0-dev libwxgtk3.0-dev zlib1g-dev libasound2-dev libgtk-3-dev

Now, you are ready to configure and compile!
$ ./configure
$ make -j4

That's it!

Solution to Jupyter Error of Consistent Restart

While I was trying to run jupyter notebook, I noticed some weird error where the notebook keeps restarting with some error. 

    self.asyncio_loop.run_forever()

  File "/usr/lib/python3.5/asyncio/base_events.py", line 340, in run_forever

    raise RuntimeError('Event loop is running.')

RuntimeError: Event loop is running.

After some time searching for solution on Google, here is what I found: I simply need to re-install some of the jupyter-related packages.

$ pip uninstall ipykernel ipython jupyter_client jupyter_core traitlets ipython_genutils -y

$ pip install ipykernel ipython jupyter_client jupyter_core traitlets ipython_genutils

Now, the jupyter notebook runs just fine. I suppose the problem was that I installed some packages that somehow interfered with the already-installed jupyter related packages above and caused the error. After removing and re-installing the jupyter-related packages, jupyter finally seems to run just fine!