btw5-switch.py

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#!/usr/bin/env python3

#

#

import sys

import usb.core  # requires PyUSB (e.g. via `apt install python3-usb` on Debian)

dev = usb.core.find(idVendor=0x041e, idProduct=0x3130)

if dev is None:

    raise ValueError('Device not found')

cfg = dev[0]

intf = cfg[(0, 0)]

ep = intf[0]

i = intf.bInterfaceNumber

if dev.is_kernel_driver_active(i):

    dev.detach_kernel_driver(i)

data_hq = [0x03, 0x5a, 0x6b, 0x03, 0x0a, 0x03, 0x40]  # HQ

data_ll = [0x03, 0x5a, 0x6b, 0x03, 0x0a, 0x03, 0x20]  # LL

if len(sys.argv) > 1 and sys.argv[1] == "hq":

    data = data_hq

    print("Enabling AptX Adaptive High Quality mode")

else:

    data = data_ll

    print("Enabling AptX Adaptive Low Latency mode")

data += [0x00] * (65 - len(data))

result = dev.ctrl_transfer(0x21, 0x09, wValue=0x203, wIndex=0x00, data_or_wLength=data)