sc_audio_mixer

Stable release:	unreleased
Status:	first port to github
Maintainer:	xross
Description:	Audio mixer component and examples

Key Features

• Build-time configurable input/output count mixer thread.
• Mixer threa takes samples in via a channel, and outputs mixes via another channel
• Control commands come in from a third control channel
• Includes saturation
• Includes example use application

To Do

• Add routing
• Add dB control

Firmware Overview

This repo contains audio mixer and example application.

There is an example application included in this module:

• app_example_mixer - This is a self contained test application for testing the mixer. It passes sin waves into the mixer.

The primary module is module_audio_mixer. This contains the audio mixer module which provides mixing functionality along with an API for using it.

Issues

• When compiled on 11.2.2 tools the program traps on termination:

  TRAP ET: 4, SPC: 000103ee, SSR: 0, ED: 00000002 (ILLEGAL_RESOURCE: Src chanend in use)

  This appears to be an issue with the 11.2.2 tools release.

  Possible work-arounds:

  • Use platform.h and stdcore[] syntax. This enforces mapper generation on channel allocation rather than compiler
  • Use beta release of XMOS tools (available from xmos.com)

• See github issue tracking for other issues

Required Repositories

• xcommon [email protected]:xcore/xcommon.git

Support

Issues may be submitted via the Issues tab in this github repo. Response to any issues submitted as at the discretion of the maintainer for this line.