Sound quality is better on Bose with iPhone/iPad compared to Sony with iPhone/iPad.
BOSE AAC codec is not simply off the shelf like Sony and others. It is superior with advanced processing added by MIT University Engineering.
The Bose AAC is not just off the shelf as there is some good Bose processing on top. I was told this by Bose RND Engineering when I was doing some work for them.
Other thing to realise is Android devices use simple off the shelf AAC, probably just a cheap license. The Apple iOS AAC is far superior.
Trust me, I don't want to disappoint you, but the "Bose engineer" just told you a bunch of b***s***.
No such "special AAC" exists on the Bose 700, nor a "cheap AAC licence" is a thing.
Yes, Android devices do use a different encoder than Apple ones. No, it's not a matter of "cheaper licence".
And yes, the AAC decoder in the Bose is "off the shelf" like the one of any other AAC headphones.
Then of course this doesn't mean that Bose can't have done some optimisation in terms of DSP, high-end DAC, or any other kind of software/hardware tuning to make the headphones sound better. But that's not related to AAC.
And anyway literally every manufacturer claims to do it (see for instance Sony's "DSEE HX").
And still, nothing to do with the MIT made specially for Bose.
I bought this. ANC is great but sound quality is disappointing, it is not bad of course but I was expecting something better. I definelty don't expect audiophile sound quality from an ANC headphone, but sound could be better compared to other Bluetooth headphones.
This is Bose's 2019 flagship and it costs $400 so I was hoping significant devolopments in terms of sound. And it still only supports lame codecs SBC and AAC while advanced codes like aptx HD and LDAC sound much better. (How do I know? I have Sony XM3 which supports all codecs, I can adjust the playback codec from developer options and LDAC sound way better than AAC)
BTW, the manufacturers have the ability to tune the headphones DSP in different profiles based on the codec used.
This means that LDAC may sound better just because Sony (of course) wants their own codec to sound better.
With this I'm not saying that AAC sounds better than LDAC, mind you.
I'm just saying that the difference you hear may not be based *just* on the higher bitrate allowed by LDAC.