Before I was able to upgrade the firmware on my new PX-5S, I recorded a solo piano version of Georgia On My Mind, directly to the USB drive that plugs into the keyboard itself. Here is how it sounds. https://soundcloud.com/north-island-music/georgia-on-my-mind-solo-piano With the new firmware upgrade, volume control of the audio recording function is now possible. In general, I am totally satisfied with my purchase of the PX-5S. I play it every day!