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Pro Audio Mixer

Pro Audio Mixer Solution from Texas Instruments.

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AC/DC Adaptor

Design Considerations

Digital Pro Audio Mixer

Digital Pro-Audio mixers provide a user the ability to mix and transform audio signals, and are often used in professional recording applications. The system typically consists of a General Purpose Processor, which controls input from the user on a mixer console or 'dashboard',  which sends the information to a Digital Signal Processor (DSP).

Channels desired for mixing are communicated by the DSP to the FPGA, which acts as the traffic controller in the system. Once the signals are digitized (in the case of a microphone or instrument) or normalized (if the signal is coming from another digital system), they are sent to the DSP which performs the audio mixing/processing requested by the user. The mixed audio signals are then sent out to speakers, headphones or other digital devices.

The core subsystems include:

  • Audio Processor
    - Performs digital trim, delay, companding (compression/decompression), mixing and effects on the audio signal received via the McASP port.
     
  • Audio Decoder
    - Digitizes, demodulates, and decodes the analog audio signals to be used by the audio processor.
     
  • Audio Encoder
    - Converts digital component audio signals to the analog domain for output.
     
  • Memory (SDRAM)
    - Used by the DSP as memory for temporary data storage necessary in some mixing functions.
     
  • Receiver
    - Receives and decodes AES/EBU or S/PDIF digital audio data to be sent to the Sample Rate Converter.
     
  • Transmitter
    - Transmits and encodes the DSP's digital DataStream into AES/EBU or S/PDIF format.
     
  • Sample Rate Converter
    - Converts the sample rates from the inputs to a homogeneous sample rate going to the FPGA/DSP and vice-versa.

Recommended Resources

  • Audio Selection Tool

Application Notes (1)

Title Abstract Type Size (KB) Date Views
HTM 9 KB 11 Jul 2008 420
    

Selection and Solution Guides

Selection Guides (3)

Title Abstract Type Size (KB) Date Views
PDF 8.94 MB 11 Mar 2013 28115
PDF 3.02 MB 19 Apr 2011 5618
PDF 4.16 MB 23 Jul 2009 10242

Solution Guides (1)

Title Abstract Type Size (KB) Date Views
PDF 5.43 MB 15 Dec 2011 9300

Tools and Software

Name Part # Company Software/Tool Type
Code Composer Studio (CCStudio) Integrated Development Environment (IDE) v5 CCSTUDIO Texas Instruments SW Development Tools, IDEs, Compilers

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