I get constant "Audio device got stuck!" when I use mplayer with qpaeq. Also, when I adjust the volume, the sound gets choppy. I am using Skull Candy Hesh 2 bluetooth headphones. Here's the output from lsusb:

Bus 004 Device 002: ID 04f2:b40e Chicony Electronics Co., Ltd
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0a5c:21e8 Broadcom Corp. BCM20702A0 Bluetooth 4.0
Bus 001 Device 002: ID 0781:5575 SanDisk Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The BCM20702A0 is an external USB dongle: it's a Plugable USB Bluetooth 4.0 Low Energy Micro Adapter.

I'm running Slackware64-current from October 1st, but this has been an issue for 3 previous iterations.

When I set the output of the ALSA plug-in from 'FFT based equalizer...' to 'Hesh 2 Wireless' in pavucontrol, the messages and choppiness stop. The pulseaudio process is using around 10% CPU with and without equalization enabled.

The machine is an HP Pavilion 17 laptop with an AMD A10-5750M 4-core processor and 8 GB memory.