docs: def _make_config(config):
          """Helper to turn SBC codec configuration params into a
          a2dp_sbc_t structure usable by bluez"""
          # The SBC config encoding is taken from a2dp_codecs.h, in particular,
          # the a2dp_sbc_t type is converted into a 4-byte array:
          #   uint8_t channel_mode:4
          #   uint8_t frequency:4
          #   uint8_t allocation_method:2
          #   uint8_t subbands:2
          #   uint8_t block_length:4
          #   uint8_t min_bitpool
          #   uint8_t max_bitpool
          return dbus.Array([dbus.Byte(config.channel_mode |
                                       (config.frequency << 4)),
                             dbus.Byte(config.allocation_method |
                                       (config.subbands << 2) |
                                       (config.block_length << 4)),
                             dbus.Byte(config.min_bitpool),
                             dbus.Byte(config.max_bitpool)])