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Leaving this here for the poor souls on Linux systems that run into errors accessing the default input or output devices using PortAudio and get nothing back.

Maybe you’re using rust-portaudio and your application panics after accessing default_output_device or default_intput_device even though you clearly have default audio devices set:

thread ‘main’ panicked at ‘called `Option::unwrap()` on a `None` value’

This pretty much means that you don’t have libasound installed on your system. While the PortAudio project mentions this in its build documentation, the Rust version of this library doesn’t explicitly mention this dependency.

On Debian-based systems (Ubuntu and whathaveye), run the following command to cure this:

sudo apt-get install libasound2 libasound2-dev

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