While there are some great Linux audio players (and I would encourage you to explore them) there is absolutely nothing to stop you running your old friend Foobar on Ubuntu using Wine. Run the following from a Terminal:
sudo apt-get install wine
And then download and install Foobar:
And this will be enough to get Foobar running nicely on Ubuntu. Below is a screenshot of Foobar running on Trusty Tahr:
If you are interested in extending Foobar a little further you could also consider using the same process to install Foobar's Free Encoder Pack...