Spontaneous Music Live contains two side-length pieces of unedited improvisation recorded live at Los Angeles venue Zebulon during SML's December 2025 three-night residency just weeks after the release of the band's second album HOW YOU BEEN. It was recorded and mixed live to stereo tape by Bryce Gonzales (the same engineer/wizard known for his gorgeous live captures/mixes of Jeff Parker's ETA IVtet).