Audio Pre-Processing System Reference Design for Voice-Based Applications
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Key Document


This reference design uses multiple microphones, a beamforming algorithm, and other processes to extract clear speech and audio amidst noise and other clutter.  The rapid increase in applications that are used in noise-prone environments for voice activated digital assitants creates demand for systems that extract clear voice from noisy environments.  The reference design uses a microphone array and a sophisticated signal processing to extract clear audio from noisy environments.

  • Single digital signal processor (DSP) SoC for audio pre-processing
  • Circular microphone board (CMB) with 360 degree coverage of audio source
  • Audio pre-processing software
  • Hardware/software with modularized components to build an audio pre-processing solution for clear voice triggering and recognition

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Design Files

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66AK2Gx (K2G) Evaluation Module


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PCM1864 Circular Microphone Board (CMB) 103dB 4-Ch Software-Controlled Audio ADC With Universal Front End Evaluation Module


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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
66AK2G12  Multicore DSP+Arm, 1 Arm A15 cores, 1x C66x DSP core  Digital signal processors (DSP)  Sample & Buy View Design Kits & Evaluation Modules
PCM1864  103dB 4-Channel Software-Controlled Audio ADC With Universal Front End  Audio converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
66AK2G12 Download Download
PCM1864 Download

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Technical documentation

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VID (1)
Title Date Type
Demonstrating Voice Preprocessing 18 May 2017
User guide (1)
Title Type Size (KB) Date
PDF 4730 12 Jun 2018
White paper (1)
Title Type Size (KB) Date
PDF 1402 09 May 2017
Design files (10)
Title Type Size (KB) Date
ZIP 6085 11 May 2017
ZIP 18998 11 May 2017
ZIP 10228 11 May 2017
PDF 196 11 May 2017
PDF 89 11 May 2017
PDF 334 11 May 2017
ZIP 151 11 Aug 2016
ZIP 12389 11 Aug 2016
PDF 1523 11 Aug 2016
PDF 119 11 Aug 2016
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
PCM1864-Based Circular Microphone Board (CMB) Reference Design  TIDA-01454  Reference design 

Hardware development (2)

Name Part Number Tool Type
66AK2Gx (K2G) audio daughter card  AUDK2G  Daughter card 
66AK2Gx (K2G) Evaluation Module  EVMK2G  Development kit 

Software development (1)

Name Part Number Software Type
Processor SDK for 66AK2Gx Processors - Linux and TI-RTOS Support  PROCESSOR-SDK-K2G  Software development kit (SDK) 

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