The Berlin Sessions. Tronic Jazz: The Berlin Sessions builds upon the foundation established by it's predecessor to create an even more powerful statement of intent, one that communicates more persuasively than ever Gerald's vision for techno. Where Proto Acid offered a seamless mix of 24 cuts, recorded in one epic session, Tronic Jazz collects 13 standalone tracks. That's welcome news to DJs. But there's something else: freed from the flow of the mix, the tracks go deeper into themselves, even while contributing to the overall shape of the album as a single, coherent form. They're more varied in tone and mood, and even tempo. While Proto Acid was, by definition, a tracky affair, a kind of puzzle comprised of interlocking pieces, Tronic Jazz stretches out to explore it's ideas in greater detail and greater depth. Nothing overstays it's welcome:.