+1, its pretty sad
im grateful for the product but i was expecting a little more support
Any updates? Itâs been 2 months since the last message about the Bluetooth module.
@Eric68 @Gouwa - are you still working on this? Please let us know. The lack of information is disappointing.
Hi @grulmlurg
Yep, sure thing!
Both we are here to build more niubility products to the market:
The BT Magic module will be ready for sale very soon.
And also sorry for being lack of information 
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What is the board on the left?)
Hope you will add volume control of the device with bt module, so the phone can be remote for it.
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what is right circuit?
Got the module and started testing it. Itâs easy to set up, BT pairing and LDAC playback work great. However I noticed that the output volume (headphones) is much lower compared to USB. I use a pair of Yamaha HPH-MT8. With USB connection and in the high gain setting, I have a reasonable headroom, but with Bluetooth, it just runs out of juice, Iâm at max volume most of the time. Note that I donât apply any negative gain (no EQ or other DSP).
@Gouwa is this a bug? Or is it because the device has to power the BT module, so the output power goes down?
@Eric68 @Gouwa Could you advise on my question? The 3.5mm headphone out has lower volume level on BT that on USB (same gain setting, no DSP in chain).
@grulmlurg we will check here and get back to you in a few days.
Hi@grulmlurg
I want to ask you some quesions.
1ăWhat is the device which you connet toTone2 Pro by USBďź
2ăWhat is the device which you connet to BT Magic by Bluetoothďź
Hi @Eric68 - to answer your questions:
-
Itâs a Windows 10 laptop I use at work (HP ZBook, ~5 years old). Iâm plugging the Tone2 Pro to the USB-C power delivery port.
-
LG V40 phone, LDAC connection (Tone2 Pro powered by the same laptop).
I use the same phone with a Topping D70s and there is no drop in volume with LDAC.
Hi
I have measured the voltage under two different conditions.
1ăConnect to PC by USB C cable,the operation system is Win11.The result is following below.
2ăConnect to OnePlus7 Pro by BT Magic.The reasult is following below.
From the results we can find the voltage of the second result have ineed attenuation than the first one.The reason should be the problem of the bluetooth decoder.
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Hi Eric, thanks a lot for taking the time and analyzing this issue! Is this something that can be fixed in firmware for example? Or no chance for you to do anything?
Hi
Yes,Topping D70s should have enhanced the bluetooth output signal by harware.We will research how to do it by fixing the firmware.
Hi Eric, any luck with investigating this? Is there a chance it will be resolved soon?
Hi grulmlurg,
We do some test and found that: BT Magic have an issue while play ACC mode, the volume will less than other mode, and we have fixup this issue, it need the app for BT Magic to upgrade BT Magicâs firmware. the app is developping, will be release later.
We test one plus phone, test data show as below:
Hi @kenny, has this been implemented? Can you confirm the FW version that has this fix?
Hi Grulmlurg,
Yeah, we have test the FW, but it need app to upgrade BT Magic, and we plan to make the APP to support BT Magic(maybe at the end of Q2 will be release). we have release an APP last year, which just support Tea device.
Hello,
Is there any update on this? I have meze 99 classic headphones, when connected to PC as dac low gain 75% is already very loud (4.4 balanced cable). However when conected via BT Magic - hight gain - 100% - volume is lower then usb setup. Also I hear clipping and some distortion. Have to lower it to ~85% to eliminate distortion, but it is realtively quiet. Using power bank as power source.
Would appreciate any recommendation or workaround how to increase power output with BT magic (note, that transmitter volume is also set to 100%)