Going fully Wireless IEMs. Too soon? Or are we there yet?

[clerkpalmer]

someguydude, I was waiting for you to join the fray. It’s not all TW but there is chance it’s all TW that use nfmi as the source of connection from master to slave. Not all TW use this method.

 

[james444]

I don’t think trn bt20 uses nfmi. I say this because both headsets show up in my bt list independently.

Yes, but only one actually connects via BT to your source. It's the same as for the Earin M-2.

 

[clerkpalmer]

Yes, but only one actually connects via BT to your source. It's the same as for the Earin M-2.

Maybe but I’d still be surprised if the cheapie bt20 uses nfmi. Certainly could be wrong.

 

[james444]

A lot of this is ridiculously anecdotal dudes. Unless you've got straight-up electronic information or schematics, just going "well I hear a noise so it must be in SBC" is ridiculous.

Come on, do any of you seriously think Bose, Sony, Sennheiser, AKG, Audio-Technica, Master & Dynamic, and Bang & Olufsen would all be making true wireless with HQ codecs that only goes to one ear??

I don't say it's SBC on one earpiece on TWs.
I only say that SBC introduce this high pitch noise on these bass frequencies, while with AAC/AptX it's clean.
So don't you think it's interesting to discuss why the two MTWs I've got have this "SBC sounding" noise in the left channel with AAC/AptX?
No one has concluded that it's SBC per se, but if NFMI uses SBC... don't you think it's a possibility?

Well, here's a picture of the NFMI chip in the MTW:

And here's a link to the documentation that states SBC for the NXH2261:
https://www.nxp.com/docs/en/brochure/MIGLOTECHFS.pdf

There's a slim chance that NXH2261A might be different from NXH2261, but I doubt it.

 

[BigZ12]

I only wish I used the tone generator before, so it would be easier to explain.
Bombing you with Kari Bremnes and other strange sound clips
But, I guess I have introduced some interesting findings just using my 49 years old ears

 

[BigZ12]

Well, here's a picture of the NFMI chip in the MTW:





And here's a link to the documentation that states SBC for the NXH2261:
https://www.nxp.com/docs/en/brochure/MIGLOTECHFS.pdf

There's a slim chance that NXH2261A might be different from NXH2261, but I doubt it.

That's a brilliant find! I guess you solved it!?!

 

[james444]

I only wish I used the tone generator before, so it would be easier to explain.
Bombing you with Kari Bremnes and other strange sound clips
But, I guess I have introduced some interesting findings just using my 49 years old ears

No problem at all. I like Kari Bremnes, even though I don't understand a word of what she's singing about.

Interesting findings indeed, congrats on your well-preserved ears!

 

[BigZ12]

No problem at all. I like Kari Bremnes, even though I don't understand a word of what she's singing about.

Interesting findings indeed, congrats on your well-preserved ears!

Good "old" Kari have got some beautiful songs with great lyrics (sorry you can't appreciate them), and her recordings have got some of the best sound quality I've heard!

 

[korefuji]

I’m confused about this guys. I thought we were all aware that nfmi was used with the current range of twes, what’s the revelation exactly? And have we discovered categorically that sbc is used exclusively in one ear bud for nfmi twes which are in nearly all twes right this moment.

Nfmi requires one master one slave bud which is why the battery drains more one than the other right?

So the only thing I’ve understood about this conversation is that future twes are considering Qualcomm chips which provide both twes as master and doesn’t require nfmi to bridge the twes across the head as they both connect to the source. Increasing battery life and improving sound and proximity.

Still I’m not sure what’s been discovered? Is this s revelation for everyone here? Or am I missing something?

 

[SomeGuyDude]

I would be absolutely stunned if this was true. It would be a comically egregious example of a company dropping the ball in designing it. Are you all thinking the companies just weren't aware? That it was cheap and they hoped no one noticed? Why would aptx/AAC be included if only one earbud used it?

 

[clerkpalmer]

I’m confused about this guys. I thought we were all aware that nfmi was used with the current range of twes, what’s the revelation exactly? And have we discovered categorically that sbc is used exclusively in one ear bud for nfmi twes which are in nearly all twes right this moment.

Nfmi requires one master one slave bud which is why the battery drains more one than the other right?

So the only thing I’ve understood about this conversation is that future twes are considering Qualcomm chips which provide both twes as master and doesn’t require nfmi to bridge the twes across the head as they both connect to the source. Increasing battery life and improving sound and proximity.

Still I’m not sure what’s been discovered? Is this s revelation for everyone here? Or am I missing something?

The revelation (at least to me) is that nfmi limits the connection from master to slave to sbc only and someone on here was able to notice the difference in sq. So basically even a aptx enabled tw with nfmi is really only 50 percent aptx.

 

[clerkpalmer]

I would be absolutely stunned if this was true. It would be a comically egregious example of a company dropping the ball in designing it. Are you all thinking the companies just weren't aware? That it was cheap and they hoped no one noticed? Why would aptx/AAC be included if only one earbud used it?

In theory using aptx aac from source to master would still improve things overall particularly if the quality of the sbc connection to the slave is better eg higher bit rate than a typical sbc connection. As discussed above (lots of posts today) the nfmi chip used in tw transmits sbc at very high bitrates. Much higher than the typical sbc source connection used in standard bt headsets.

 

[nc8000]

Yes, but according to your theory, my TRN BT20 should exhibit the high pitch noise at the left side with AAC. Which it just doesn't, I'm afraid. It sounds clean at both sides.

And to make things worse... I just tried the Havit G1, which is SBC only. And that one is noisy at the right side, but not on the left. Go figure!

The G1 does aac and does not use nfmi

 

[clerkpalmer]

Based on the tech specs for the nfmi chip being used by Sennheiser it’s no secret at all.

 

[james444]

Maybe but I’d still be surprised if the cheapie bt20 uses nfmi. Certainly could be wrong.

Well, I'm not sure about the BT20 either, but the Havit G1 cost me 40 euros and definitely uses NFMI.