I mostly listen to analog music in the form of LP. Otherwise much on cd too. But thought about whether it's worth buying a DAC? Especially for the interference of FLAC files streamed from my phone via bubbleupnp (dnla) to my Samsung smart tv. To the TV, I have a Pioneer A-X550 Amplifier connected with an optical cable. As I hear, I think the sound is almost in line with the CD. Maybe my ears are untrained? But do you think an external DAC is necessary?