01-21-2019, 02:46 PM
(This post was last modified: 01-22-2019, 01:59 PM by TheOldPresbyope.
Edit Reason: corrected name of adapter
)
@CityCentreFox
Yes, moOde can drive Bluetooth headphones. There's the usual Bluetooth scanning, pairing, and connecting steps, followed by switching output to the connected Bluetooth device. All this is done through the moOde UI.
However, there's also the question of the codec(s) supported in the headphones.
The specs for Bluetooth advanced audio (A2DP) *require* support for the low-complexity subband codec (SBC). Guaranteed to work.
The specs also *allow* the use of alternative codecs such as AAC, LDAC , and aptX. (For a non-techie comparison, see, e.g., https://www.soundguys.com/understanding-...ecs-15352/) If both sender and receiver support one of these codecs, then it will be chosen during negotiation of the Bluetooth connection.
As currently built, moOde supports only the SBC codec (via the third-party software component bluez-alsa).
This means no matter what BT headphones you use, you will be in SBC mode.
In my case, I have Sennheiser HD4.50 BT headphones. They support the aptX codec but fall back to the default SBC codec when connected to my moOde player via the RPi 3B+ BT transceiver.
I get around this by using an Creative BT-W2 USB-Bluetooth audio adapter on my moOde player. It looks like a USB DAC to moOde and uses the aptX codec for the BT stream to my headphones.
Regards,
Kent
PS - It's no secret that experimental support for AAC, aptX, and/or LDAC can be built into the bluez-alsa component. The legality of this is questionable, especially in the case of aptX.
Yes, moOde can drive Bluetooth headphones. There's the usual Bluetooth scanning, pairing, and connecting steps, followed by switching output to the connected Bluetooth device. All this is done through the moOde UI.
However, there's also the question of the codec(s) supported in the headphones.
The specs for Bluetooth advanced audio (A2DP) *require* support for the low-complexity subband codec (SBC). Guaranteed to work.
The specs also *allow* the use of alternative codecs such as AAC, LDAC , and aptX. (For a non-techie comparison, see, e.g., https://www.soundguys.com/understanding-...ecs-15352/) If both sender and receiver support one of these codecs, then it will be chosen during negotiation of the Bluetooth connection.
As currently built, moOde supports only the SBC codec (via the third-party software component bluez-alsa).
This means no matter what BT headphones you use, you will be in SBC mode.
In my case, I have Sennheiser HD4.50 BT headphones. They support the aptX codec but fall back to the default SBC codec when connected to my moOde player via the RPi 3B+ BT transceiver.
I get around this by using an Creative BT-W2 USB-Bluetooth audio adapter on my moOde player. It looks like a USB DAC to moOde and uses the aptX codec for the BT stream to my headphones.
Regards,
Kent
PS - It's no secret that experimental support for AAC, aptX, and/or LDAC can be built into the bluez-alsa component. The legality of this is questionable, especially in the case of aptX.
