Phat beat test fail

Phat beat is installed on a rpi3 system that has a disk drive with a number of partitions.
The partition being used has a full and uptodate version of Raspbian. The phat beat has two speakers installed as supplied by Pimoroni.
The software was installed as per instructions without any error messages.
But on running test it comes back with “playback open error -16, device or resource busy” What have I done wrong please?


sudo systemctl stop pulseaudio
speaker-test -c2 -t wav

You can also comment all entries in the playlist which you find in /etc/vlcd/default.m3u (save it), then reboot and run the speaker-test. After successful tests ofcourse go back to uncomment the playlist entries.