Social Media Preview Cover

Prompt

Generate a fun wide-landscape cover image for this textbook on signal processing.
The title is "Signal Processing". It should be in text in a bright color on a darker background. The background image is a collage of images found in signal processing. Waveforms, integrated circuits, radar, music and other images should be blended together. The image must have exactly a 1.91:1 width to height ratio and be 1200 pixels wide. It will be used as a social media preview.