Most of us are streaming these days, so I thought we’d spend the next few days exploring how it really works.
For something so common, streaming remains surprisingly misunderstood—even among audiophiles. People know how to use it, but not always how it works. And without that understanding, it’s easy to make the wrong assumptions when evaluating sound quality or building a digital system.
The first element in a streaming setup is the controller and there are fancy ones like Roon, Audirvana, and JRiver—rich with metadata and help choosing what to play. But, at the end of the day, they are all just fancy remote controls.
These fancy remotes are usually your iPad, phone, or computer—the devices you use to browse music and tell your system what to play. But despite appearances, this device isn’t where the music lives. It’s not doing any audio processing. It’s just a control interface—essentially a smart remote.*
*Several of these, like Roon and Audirvana, handle processing, equalizing, upsampling etc. in their computer which is an entirely different conversation, because those computers/processors are not in the controller and, some would argue, perhaps better left unused as we stick to the pure stream—but that's fodder for another post.
When you browse Tidal or Qobuz on your tablet and select an album to play, the controller doesn’t stream that music to your system. Instead, it sends instructions to the actual renderer—your streamer or DAC—telling it to fetch that music directly from the service. The file doesn’t pass through your phone at all. It travels straight from the cloud to your audio gear (in its pure form but...see the italicized comment above).
Think of it like watching a movie at home. You might use your phone or remote control to launch Netflix, but the movie plays on your Apple TV or smart TV—not the phone. That’s exactly how audio streaming works. The controller helps you navigate, select, and manage playback—but it’s not part of the signal chain.
And because it’s not in the signal path, the controller’s sound quality doesn’t matter. What does matter is how it communicates with your system. Some apps use protocols like UPnP, Roon RAAT, or Chromecast. Others use proprietary systems. Compatibility with your streamer or DAC is critical, because if the controller can’t talk to the renderer properly, the rest of the chain breaks down.
So while the controller might feel like the heart of the system, it’s really just the interface. The brains—and the sound—come from the components that follow.
Tomorrow, we’ll dive into the renderer: the overlooked engine room of streaming.
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