Adding run-time control to the DSP in a USB audio application with an active speaker example.
Overview#
This application note describes how to add real-time control to a DSP pipeline developed using lib_audio_dsp. Output audio from the host is passed through a DSP pipeline generated with lib_audio_dsp. An active speaker application with volume control and bass boost is used as the example.
Key Features#
The application is designed to run on the xcore.ai Multichannel Audio Board (MCAB). It uses the XMOS USB Audio framework to implement a USB Audio device with the following key features:
USB Audio Class 2.0 (High Speed)
Multi-channel inputs and outputs connecting the host to ADCs and DACs
DSP that is simple to configure to a specific application
48 kHz sample rate
Known Issues#
None
Required Tools#
XMOS XTC Tools: 15.3.0
Required Libraries (Dependencies)#
lib_sw_pll (www.github.com/xmos/lib_sw_pll)
lib_xua (www.github.com/xmos/lib_xua)
lib_adat (www.github.com/xmos/lib_adat)
lib_locks (www.github.com/xmos/lib_locks)
lib_logging (www.github.com/xmos/lib_logging)
lib_mic_array (www.github.com/xmos/lib_mic_array)
lib_xassert (www.github.com/xmos/lib_xassert)
lib_dsp (www.github.com/xmos/lib_dsp)
lib_spdif (www.github.com/xmos/lib_spdif)
lib_xud (www.github.com/xmos/lib_xud)
lib_i2c (www.github.com/xmos/lib_i2c)
lib_i2s (www.github.com/xmos/lib_i2s)
lib_audio_dsp (www.github.com/xmos/lib_audio_dsp)
Support#
Issues can be raised against the software at: http://www.xmos.com/support
