~/.config/pipewire/pipewire.conf.d/10-bt-headphones-default.conf
===========
context.properties = [
  default.configured.audio.sink = { "name": "bluez_output.AC_12_2F_24_80_86.1" }
]
===========使用pipewire的模块消除麦克风的回音
~/.config/pipewire/pipewire.conf.d/20-echo-cancel.conf 
===========
 context.modules = [
  {   name = libpipewire-module-echo-cancel
      args = {
          # library.name  = aec/libspa-aec-webrtc
          # node.latency = 1024/48000
          source.props = {
             node.name = "Echo Cancellation Source"
          }
          sink.props = {
             node.name = "Echo Cancellation Sink"
          }
      }
  }
]