For all the iPhone’s talents, there’s still one glaring area that’s plagued it since its launch, and where it’s arguably inferior to certain Android devices: wireless audio quality transmission. More specifically, high-resolution, or lossless, audio.

Yes, despite Apple offering select albums and tracks in up to hi-res lossless audio quality via Apple Music — at no extra charge, no less — no pair of Apple headphones actually supports the format. The AirPods Max 2, and the refreshed first-gen set of Apple’s over-ear headphones, support lossless audio when connected via USB-C, but not true high resolution.

For the majority of music fans it won’t matter that iPhones don’t support higher quality audio codecs. But considering Android devices do support them, and the fact there are genuine audible benefits to higher quality streams, why wouldn’t you want to get them if the option was there?

It continues to be a peculiar oversight by the tech giant, I feel, but fortunately there is a super simple workaround to unlocking the sonic benefits of high-res, all thanks to Sennheiser and a plug-in USB-C adapter. And for the low price of just AU$59.

There are plenty of reasons for wanting to unlock high-res audio from your smartphone. First and foremost, there’s a very good chance it’s already included with your music streaming service subscription. Apple Music, Tidal, Qobuz and now even Spotify all offer higher-res versions of millions of songs. Look at it this way — you’re paying for that quality, but if you’re listening with an iPhone and a pair of AirPods you’re missing out on a vastly superior music experience.

This Sennheiser dongle fixes that, although as previously mentioned, you will need a pair of compatible headphones, and nothing from Apple itself makes the cut. While the BTD 700 can transmit high-resolution, or lossless audio from an iPhone via aptX Adaptive, the AirPods won’t receive it, and will instead revert to inferior AAC or SBC codecs.

If you need some suggestions, there are some top-rated pairs on sale now for EOFY that support either aptX Adaptive or aptX Lossless, or both, that will take full advantage of what the BTD 700 transmitter can offer.

What is lossless audio?

Lossless audio can be a bit of a contentious subject in some circles (here’s looking at you audiophiles). Some claim it’s the best thing since sliced bread, while others claim they can’t hear any noticeable difference in quality.

Throw in myriad codec options that each do something a little different, and it’s easy to see why it’s not only confusing, but also hard to really care about.

In theory, aptX Adaptive and aptX Lossless codecs are capable of carrying more information than AAC or SBC (which the iPhone supports). Lossless audio streams go one better by delivering a bit‑perfect CD‑quality stream.

Even then, however, it’s not fully guaranteed, because you need every step in the chain to be working at its full potential. You first need a good recording that actually contains all the extra information, and then you need a capable set of headphones. And, since we’re talking about wireless transmission here, it can still be susceptible to interference, which can have a negative effect on sound quality.

But if you already own decent Snapdragon Sound cans, the BTD 700 finally lets them run the codec they were designed around instead of being stuck on AAC, which is a genuine quality win — especially from an iPhone.

If you’re keen to reap the benefits of higher quality sound, you may want to jump on this deal. I’ve seen it going in and out of stock on an almost daily basis.