Choose the language that you like the best, that is related to things you're interested in, and that motivates you to write lots of code.
I would personally recommend something that doesn't depend on a specific OS, or a proprietary tool chain. I got away from VB after more than a decade of use because it has become bloated beyond recognition, and is tied down to a single OS.
Not to push you towards a language, but just to give an example of a thought process... I have a science background, and I use programming as a tool for making things and solving problems. I chose Python because it's powerful yet lightweight and free. It is supported by some amazing free libraries for GUI, graphing, math, Web serving, etc. My Python programs can run on Windows, Linux, and Raspberry Pi, with no code changes.
People who know that I like Python have said that I'd like C#, but I just don't want to use proprietary tools.
Are you interested in hardware? Most hardware level programming is done in plain C. If you're heading towards any of your audio apps moving into the hardware domain, then you won't be able to avoid C.
More and more programming is being done by mashing together code from a variety of sources rather than writing everything from the ground up. Many systems have subsystems running under different languages, such as Python on the server side and Javascript on the client side.
Whatever you choose, have fun! You could take baby steps towards audio. For instance your programs to process audio files don't have to work in real time right away. You can let them run, and then listen to the results when the program finishes.