To date, I've kept my instruments and my computer separate. (For some reason, an iPad doesn't seem to count as a computer.) But Arturia offered me such a good price on its V Collection Series 4, that I couldn't really say no. This morning I was flipping through the Prophet-V pad presets, trying to understand what makes them work, and wondering how I could approximate the original Prophet-5's poly-mod feature on the Prophet '08. Specifically, I'm interested in the pulse-width mod. Maybe it's just narrow experience on my part, but the poly-mod version of PWM seems different from the LFO version, and I can't figure out why.