If this were a Schiit unit, the boys there would call it a decrappifier. EJ Sarmento calls it the Remedy. Before you quip that cow manure equals steer dung ergo bullshit, Wyred have this graph to illustrate what they remedy and by how much. That's a ~80% reduction of jitter measured on an Apple TV. If the Remedy sounds better, that's why.

As John Darko put it, "$400 isn’t cheap but neither is it anywhere near the stupid money that some hifi gadgetry can cost you. Think of it this way: the Airport Express + W4S Remedy will cost you less than a MacMini but sound just as good as the latter feeding the Bifrost’s Gen2 USB (which is one of the few really good entry-level USB implementations out there that doesn’t require USB-S/PDIF converter intervention)." To which his conversation partner Barry replied: "Oh, ok. I think I understand. So if we add the Remedy to my Airport Express, it will sound as good as your MacMini?"

John: "Well, that’s been my experience at home. I’ve had the Wyred4Sound µLINK playing reclocker to the MacMini’s USB and I don’t think it’s quite as smooth as the Remedy working its magic on an Apple TV. And with the Remedy being a palm-sized unit and its 9V PSU being a small and light switch-mode type, it’s easy for me to keep it knocking around in my bag. Hook it up, will you? Connect the Airport Express Toslink output to the input on the Remedy and then use this Zu Audio coaxial cable to make the connection to the Bifrost."

And how did John and Barry perceive the Remedy improvement? Barry: "It definitely sounds better. More relaxed, as if some tension in music’s shoulders has been massaged away." John: "Careful now. You’re starting to sound like me! What you say is true though. It’s just easier to listen to, isn’t it? That, my friend, is what lowering jitter does. It lends music reproduction more graceful ease. Diamond Dogs doesn’t sound as tense or as rigid in its joints, does it?" Barry: "Errrrm…..yeah. I think I know what you mean. I sure wish you’d speak in terms I could understand though. I’m hearing slightly better more present bass on the title track of Del Rey’s Ultraviolence." John: "Ah, yes. Presence. That’s a good descriptor here. Music sounds more present. And do you notice how the soundstage doesn’t sound as pancake flat as it did previously? There’s more depth to it."

Test-bench pressers go batty with such flowery descriptions. More graceful ease. That's so touchy feely. You can't bloody measure that. Hence it must be delusional. Imaginary stuff. Or does a significantly lower jitter measurement signify exactly that? It's important to acknowledge something. Most people don't listen to frequency response and waterfall plots as things which are easily measured. Instead they listen for emotional involvement; to relax after a stressful day; to be temporarily taken out of the realm of mundane concerns and worries. They listen as some form of non-verbal immersion therapy. It has them feel better afterwards than they felt before. The free Fiji resort effect. That's very real. Music as remedy then. A warm bubble bath or a cold invigorating shower. It might not please the measurement brigade but that doesn't make this type of easier-to-listen-to improvement bullshit. You simply must trust your own very subjective reaction to your hifi more than seek approval from measurements which some self-proclaimed authority somewhere took with a fancy machine. As always, the real question is whether you find such gains commensurate with the ask; and trust that you'll know the answer as it applies to you.