Trent Piepho

The samdecrypt.sh script worked for me on Samsung_SSD_960_EVO_3B7QCXE7.iso using the key `57633f2c1f8937565e935799356cd41f2366e0d1a74acfd6b6375dbab5e2e644`

I tried this with a RTL8761b, which works with Alt3 + 72 byte MTU. No luck. Initially impressions is it's not detecting the incoming eSCO data. ``` bluealsa[170724]: /usr/bin/bluealsa: D:...

I increased the eSCO timeout from 30 ms to 90 ms. This fixed it and a MTU of 72 is detected. There is still a glitch at the beginning of...

It might be possible that this USB BT adapter just doesn't support mSBC. Apparently ALT mode 6 is supposed to be used for mSBC over USB. I disabled mSBC support...

Hacking the btusb driver to use alt1 instead of alt6 was able to produce audio! But it sounds bad. Too loud and with a hiss in the background. It sounds...

Is it not possible to use another alt setting? There is now a [patch](https://lore.kernel.org/patchwork/patch/1265703/) from Realtek that uses alt 1 for one of their devices in the kernel. For socket...

> it would then require a vendor-specific "quirk" in the driver for correct communication between the driver and the firmware. That would be the quirk flag `BTUSB_USE_ALT1_FOR_WBS` that is set...

It would be nice if there was a way with the ALSA device specification to select NBS and CVSD even if WBS is supported, in cases where it doesn't work....

So the issue is that the firmware, only implementing up to alt 5 with 49 byte packets, probably does not have a buffer large enough to assemble a full 60...

In theory one could connect an I2S DAC or ADC directly to the PCM interface on the BT chip and transfer the audio directly without the CPU being needed. Maybe...