Lots of people think DSP is hard, mostly because they learned DSP in college from professors who only understand it from a mathematical perspective. It's really not that difficutlt. If you have used iPhoto to tweak the brightness or contrast of a photo, you've done DSP. It's just mathematical manipulation of digital signals, and a digital photo is a digital signal.

We normally use DSP to test analog devices. Signal to Noise measurements, stereo separation, DAC and ADC linearity, all kinds of stuff. The one device you don't use DSP to test? A DSP chip! These are usually pure digital, so you just run a lot of patterns to verify functionality.

I published a book on DSP and analog! Distortion, The Cause Of Harmonics And The Lie Of THD is available on Kindle and Print

- Arbitrary Waveform Generators
- A Palette AWG (one of my inventions)
- Aliasing and Super-Nyquist Theorem
- Sampling Basics and Aliasing
- Video on Sampling, Aliasing and Nyquist
- Practical example
- Testing Audio devices
- Testing filters with periodic white noise
- Measuring High Frequencies with a cheap digital tester
- Seminar on Measuring High Frequencies with a cheap digital tester
- Testing HDTV Filters with Digital Pins
- Windowing Non-Coherent Signals
- The Bullard Laws of Harmonics
- Simulating a Sigma Delta ADC in "C"
- Reordering a captured wave to simulate a super high sampling rate
- Measuring Duty Cycle without a TMU
- My STS3000 DSP training course
- Time Multiplexed Multi-Tone waves, a new way to test filters
- Measuring Jitter of a Spread Spectrum Clock Generator
- Testing a MEMS Accelerometer's beam resonance
- A rant about things that many engineers believe that are WRONG.
- An article proving that harmonics are produced in proportion to their
*area*on LinkedIn. - An article proving that the harmonics created by distortion mirror the sinusoid feature removed on LinkedIn.
- An article proving that even harmonics are
**not**created by asymmetry on LinkedIn. - An article chiding the loose language that permeates texts on harmonics on LinkedIn.
- A really simple Excel file that lets you do experiments with a sine wave and do an FFT with color color-coded spectrums to see the behavior of Odd and Even harmonics.
- A really cool Perl program for converting a .csv file (from Excel, etc) to a .wav file so you can hear the results of your DSP experiments.
- An article explaining how to use my Excel sinewave experiment package on LinkedIn.
- An article explaining how I massaged the Frequency Domain data from Excel to finally figure out how harmonics are created.
- An article explaining how aliasing can be your friend.
- An article explaining that there are no limits to aliasing.
- An article explaining how we measure energy.
- An article explaining that M in the sampling formula need not be prime.
- An article explaining how I came to understand harmonic spectra.
- An article explaining the three errors I found in Bob Metzler's book, The Audio Measurement Handbook. Kind of a Distortion lite.