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2009 Winter Symposium: Training Classes: Christopher Struck

 

 

Applied DSP for Audio Applications- Paul Beckmann (DSP Concepts) and Al Clark (Danville Signal Processing)

4 hours - Cost: $175 (members) / $225 (non-members)

 

The course provides an overview of Digital Signal Processing with an emphasis on audio applications.  It includes basic theory on filters and filter design, and discusses practical issues faced when implementing algorithms in real-time on a digital signal processor.  The material is presented in an easy-to-understand format with a heavy emphasis on practical application.

 

This course is ideal for engineers with a basic understanding of signal processing seeking an introduction to digital processing concepts.  It is suitable for R&D engineers and speaker designers.

 

Course Outline:

 

Sampling
  • Nyquist theorem
  • A/D and D/A conversion
  • Discrete-time frequency
  • Aliasing
Filters
  • Frequency response (phase, magnitude, and group delay)
  • FIR vs IIR
  • Pole and zeros
  • Standard IIR filter types (Butterworth, Chebyshev, etc.)
  • Standard FIR design functions (windowing and equiripple)
  • Pros and cons of each design type
  • Examples
Implementation
  • Floating-point vs. fixed-point processors
  • Capabilities of modern processors
  • Bit widths and SNR
  • Software architecture
 
  • Embedded software
  • Interrupts
  • Real-time processing
  • Block processing vs. sample-by-sample processing
  • Numerical issues and work arounds
 
  • Watch out for low frequencies
  • Different filter structures
Other audio processing functions needed in speakers
  • Time delays
  • Mixers
  • Gain adjustments
  • Crossovers
  • Peak limiters
  • Other filters:  Parametric EQs, allpass, notch, etc.

 

Paul Beckmann Paul Beckmann
Paul Beckmann is the founder and general manager of DSP Concepts, LLC, an engineering services company specializing in embedded audio processing tools.  He has many years of experience developing and implementing audio algorithms.  Paul has taught industry courses on digital signal processing, and holds a variety of patents in audio processing techniques.  He spent 9 years at Bose Corporation and was involved in R&D and product development activities.  Paul received S.B., S.M., and Ph.D. degrees in Electrical Engineering, all from M.I.T.

 

Al Clark

Al ClarkAl Clark is the founder and president of Danville Signal Processing, Inc., a manufacturer of DSP boards and systems aimed at OEM s and systems integrators. He has over 30 years of hardware and software design experience including extensive expertise in high performance audio systems including a patent for a phono preamplifier design. He has been designing DSP based hardware since the late 1980s. Al has a Bachelors in Electrical Engineering from the University of MN.

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