It all works nicely, as of this afternoon. I simplified the audio because I did not get my Raspberry Pi audio cable ready. With as many Raspberry Pi B+ and newer that have been sold, I wonder why someone does not build audio cables. Ideally, it would be a short cable with the weird Raspberry Pi trrs connector on one end and a female 3.5 stereo audio jack on the other end. Then, you could plug cheap computer speakers in. I mount Raspberry Pis on the back of LCD monitors. These pften have a 3.5mm stereo jack built in. Oh, well.
So, I used the network to play the audio. When the neopixel display lights up, a command is sent through ssh to a desktop Linux machine to play the sound file Charles Gantt calls correct.mp3 I like the effect of it coming from the next room. This project has been fun and I look forward to starting a new one I'd like to build a movement tracker using the accelerometer, magnetometer, and gyroscope in the Sense Hat. I have played with those a bit and I see I need to do some research on smoothing that data to make it useful. Everyone have a happy All Saints Day(Nov 1).