Choosing the right cable for your DAC shouldn't be a guessing game. This episode cuts through the marketing hype to explain the real physics behind USB, TOSLINK, and balanced connections. We explore how galvanic isolation can silence a noisy mini PC, why optical has a strict bandwidth limit, and when a simple ferrite bead is all you need. Whether you're battling ground loops or just want the cleanest signal, learn how to pick the right connection for your specific setup.