Thanks for the information. I downloaded alsa and ran alsaconf. It recognized my sound card and configured it and indicated that sound levels were ready to be controlled by a sound mixer. I got nowhere with the amixer commands. I could not figure out the commands and the labels used by amixer, so I download sgmixer and adjusted the volume labeled pcm, not sure what pcm stands for, and then I got sound from the speakers using the speaker-test -c 2 command. So it works, but how it works seems a bit mysterious.