E: Unable to locate package libmpg123-dev

Question

I am trying to follow this article to get a USB sound driver set up for my rapsberry pi 3 with raspbian OS:

https://learn.adafruit.com/usb-audio-cards-with-a-raspberry-pi/testing-audio

I am able to test it with SonicPi and the speaker test command for the command line but I am having trouble downloading mpg123. The error message is as follows:

---

pi@JoeLyons_raspberrypi:~ $ sudo apt-get install libmpg123-dev Reading package lists... Done Building dependency tree
Reading state information... Done

E: Unable to locate package libmpg123-dev

I tried googling this but it seems oddly specific to me so I'm afraid I've messed around with the wrong config files or something at some point. Any help on how to troubleshoot why this won't download would be greatly appreciated :)

Thanks.

P.S. I've also tried this variation:

pi@JoeLyons_raspberrypi:~ $ sudo apt-get install mpg123 Reading package lists... Done Building dependency tree
Reading state information... Done Package mpg123 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

E: Package 'mpg123' has no installation candidate

Answer 1

remove the libmpg123-* first will remove mplayer ardour and any dependencies related

sudo apt-get remove --purge libmpg123-0
sudo apt-get install  libmpg123-dev