By: Dipin Sehdev
When Apple announced tvOS 26 earlier this year, home theater enthusiasts were buzzing with excitement. Among the rumored new features was HDMI audio passthrough — a long-requested capability that would allow the Apple TV 4K to send unprocessed audio streams directly to an AV receiver or sound system. Early reports, including credible leaks from AppleInsider and developers who tested the beta software, suggested passthrough support was finally on the way.
Now that tvOS 26 has officially launched, the reality is clear: HDMI audio passthrough is nowhere to be found. And that omission is striking, because it was positioned as one of the most anticipated upgrades for Apple’s set-top box.
So what happened? Was it scrapped at the last moment, delayed for technical reasons, or deliberately held back for something bigger? Rumors are swirling that Apple may unveil a new Apple TV model in October 2025, and passthrough could be a tentpole feature reserved for the updated hardware. Until then, home theater fans will have to keep waiting.
Let's break down what HDMI audio passthrough is, why it matters so much, and why Apple’s decision to hold it back could signal a bigger strategy shift for Apple TV.
What Is HDMI Audio Passthrough?
In home theater setups, audio passthrough means a device like the Apple TV doesn’t decode or process the sound itself. Instead, it sends the raw audio bitstream to an AV receiver, soundbar, or processor, which then handles decoding and playback.
Without passthrough, the Apple TV transcodes all audio into multichannel PCM (Pulse-Code Modulation) or Dolby MAT (Metadata-enhanced Audio Transmission). While this works fine for many users, it’s not ideal for those who want:
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Bit-perfect audio playback: Formats like Dolby TrueHD, DTS-HD Master Audio, and DTS:X can lose metadata or subtle fidelity when transcoded.
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Object-based audio precision: Passthrough ensures the AV receiver handles Dolby Atmos or DTS:X in the way it was originally mastered.
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Futureproofing for formats: With passthrough, the playback device isn’t locked into Apple’s preferred decoding method.
In short, passthrough is about giving control back to high-end audio gear rather than forcing the Apple TV to do all the heavy lifting.
Why Enthusiasts Wanted It in tvOS 26
For years, Apple TV has been a leader in video quality, particularly with its robust Dolby Vision support. But on the audio side, it has lagged behind. Competing devices like NVIDIA Shield TV, certain Android TV boxes, and even inexpensive Blu-ray players have offered passthrough for years.
When word leaked during the tvOS 26 beta cycle that passthrough support was being tested, forums like AVSForum and Reddit’s r/hometheater lit up with anticipation. It wasn’t just another feature — it represented Apple acknowledging the demands of serious home theater enthusiasts.
For users with high-end gear like Denon, Marantz, Yamaha, or Anthem receivers, passthrough would allow Apple TV to fit more seamlessly into their setups without imposing Apple’s PCM-centric processing pipeline.
Why Didn’t It Ship?
Apple hasn’t commented officially on the absence of passthrough in tvOS 26. But several possibilities stand out:
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Technical Hurdles
Passthrough isn’t trivial to implement, especially with Apple’s tightly integrated ecosystem. Apple TV’s reliance on Dolby MAT for Atmos, for example, could have made direct passthrough a compatibility minefield across different receivers. -
Licensing and Partnerships
Support for formats like DTS:X requires licensing. Apple may have balked at adding support for codecs that aren’t widely used on streaming platforms. -
Strategic Delay
The most compelling theory: Apple is saving passthrough as a key selling point for new Apple TV hardware rumored to launch in October 2025. This wouldn’t be the first time Apple has tied a long-requested feature to fresh hardware rather than rolling it out universally.
Why Passthrough Matters to Home Theater Fans
It might sound like an edge case — after all, millions of Apple TV owners are happy with PCM or Dolby Atmos as Apple delivers it today. But for enthusiasts, passthrough unlocks several advantages:
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Full lossless audio from Blu-ray rips: With passthrough, MKV files with Dolby TrueHD or DTS-HD MA tracks can play back exactly as mastered.
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Greater compatibility with advanced receivers: Many high-end receivers are optimized to decode raw bitstreams rather than PCM conversions.
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Access to DTS and DTS:X: Apple TV currently ignores DTS formats entirely. Passthrough would change that.
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Futureproof setups: As new formats emerge, passthrough ensures Apple TV won’t become a bottleneck.
In other words, passthrough isn’t just a “nice to have.” For those who spend thousands on dedicated audio equipment, it’s a must-have for a reference-quality experience.
The October Hardware Rumor
Several supply chain leaks suggest Apple is preparing to launch a new Apple TV in October 2025. If true, this would align with Apple’s typical fall hardware window, and it would explain why passthrough was absent from tvOS 26:
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New Chipset, New Capabilities: A new A-series chip could bring expanded HDMI features, including eARC improvements and passthrough support.
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Differentiation Strategy: Apple may want to reserve passthrough for buyers of the new box, giving them a tangible reason to upgrade.
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Tight Integration With Vision Pro: Apple could use passthrough to strengthen Apple TV’s role as the central hub for both TVs and mixed reality experiences.
While speculative, the timing lines up: tvOS 26 lays the groundwork, and the next-gen Apple TV could be the true flagship for advanced home theater users.
What the Competition Is Doing
Apple’s hesitation stands in contrast with rivals:
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NVIDIA Shield TV: Offers passthrough for Dolby TrueHD, DTS-HD MA, Dolby Atmos, and DTS:X.
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Android TV/Google TV Devices: Many projectors and TV boxes ship with passthrough options baked in.
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Blu-ray Players: Even midrange models support full passthrough.
For enthusiasts, Apple TV remains best-in-class for streaming app quality and video fidelity, but it lags in audio flexibility.
The Bigger Picture: Apple’s Approach to Audio
Apple has always prioritized control and simplicity, often at the expense of niche but important features. The company’s bet is that most users don’t care about bitstreaming — they just want great sound without complexity.
But as Apple leans deeper into services like Apple TV+ and positions Apple TV as the centerpiece of premium living room entertainment, ignoring enthusiasts risks alienating the very audience most willing to evangelize its products. Passthrough would bridge that gap.
Looking Ahead
So where does this leave us?
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tvOS 26: A solid update, but a disappointment for enthusiasts who wanted HDMI passthrough.
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Next-Gen Apple TV: The most likely candidate for introducing the feature, possibly launching in October 2025.
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Apple’s Strategy: The company may be aligning passthrough with new hardware, ensuring a splashy launch event that highlights “the most advanced Apple TV ever.”
For now, Apple TV remains a fantastic streaming device, but it still leaves a gap for the home theater crowd. The real question is whether Apple will finally close that gap — and whether they’ll make it exclusive to their next box.
Conclusion
HDMI audio passthrough might not matter to the average Apple TV user, but in the home theater world, it’s a defining feature. Its absence from tvOS 26 is a missed opportunity, especially after months of rumors and beta testing chatter.
Still, all eyes are now on October. If Apple is indeed preparing new Apple TV hardware, passthrough could be the headline feature that finally makes the device as strong in audio as it already is in video.
Until then, enthusiasts will keep waiting — and hoping — that Apple finally gives them the uncompromised audio pipeline they’ve been asking for.
