Implementation and Comparison of Radix-2 and Radix-4 FFT Algorithms

Bullshit paper I wrote for the bullshit DSP class I took. The FFT code is good, though. I went the recursive Cooley-Tukey route, and I think it turned out just peachy. There's a version included at the end of the paper and a newer one here: fft.c which precalculates the twiddle factors for a much needed speedup! Check it out!

FU2000 Stereo Audio Amplifier

A 20 watt per channel, dual-mono, single ended, class A, DC coupled MOSFET audio amplifier. I'm designing this as an independent study this term at WPI. The design process will be entirely documented on this web page.

An Acoustical Analysis of Spaulding Recital Hall

Women's boots and resonant breasts of doom.

The Media Application Server (MAS)

When people ask me about MAS, I tell them it's "Sound for the X Window System". Then, I say, "Yeah, network transparent, platform independent sound. You know how you can run your X applications over the network? Well, this gives those applications sound support." If they're still interested, I let 'em have it, "Actually, MAS is completely format-independent. It doesn't care what kind of data it handles, it only knows about sequences of timed events on timestamped data. So you can do video, or any conceivable future time-sensitive data." This is what I've been doing at Shiman Associates Inc. for the past 3 years.

Radio Shack PZM Modifications

Schematic and documentation of modifications I've made to the Radio Shack Pressure Zone Microphone. Cool, cheap stuff.

My Resume

You need me. You may not even realize it yet. But, believe me. You do.

Adult Entertainment - Serious Play

Last of three nights at the Vanguard. Crowd out in the street, shoving and elbowing to catch one phrase of the shit going down inside. Ives is on his 86th chorus of some free shit Nielsen whipped up last night. No fucking cheese blintzes and belgian waffles with margarine here, this is real USDA prime grade stock, kicking and bleating and bleeding all over the stage. Buchanan is slaughtering it mercilessly, jesus man! Suddenly, Nielsen is laying down 13/8, is that it? A voice yells, "What fucking time signature is that?" and I think Scaramongos is in seven, Buchanan is in GOD KNOWS WHAT. I took way too much fucking acid for thirteen. I'm subdividing, 4-3-4-2, 4-4-4-1, 3-3-4-3, 2-2-1-3-1-2-2, 3-4-4-2, ... [it gets worse, trust me]

SMSurround - Theatre Audio Controller

Steve writes: "SMSurround was a combination of custom hardware and software designed to help run audio cues in a live theatre situation. It supported mix/matrix automation, MIDI automation, WAV playback automation, CD audio automation, scripted cues, scalability, and surprisingly a fair amount of stability. SMSurround was built from a combination of off-the-shelf hardware (PCs, CD-ROMs, sound cards, outboard MIDI hardware, etc.), custom hardware (automated mixer/matrix controller), and a lot of custom software."

Tubes vs. Transistors, Is There an Audible Difference?

Written by Russell O. Hamm, not me. Amazing clarity.

Engineers and musicians have long debated the question of tube sound versus transistor sound. Previous attempts to measure this difference have always assumed linear operation of the test amplifier. This conventional method of frequency response, distortion and noise measurement has shown that no significant difference exists. This paper, however, points out that amplifiers are often severely overloaded by signal transients (THD 30% ). Under this condition there is a major difference in the harmonic distortion components of the amplified signal, with tubes, transistors, and operational amplifiers separating into distinct groups.

Building a Hypex UCD400 Stereo Amplifier Kit

Nearly all of my electrical engineering skills are gone, as evidenced by this. Building a Hypex DIY kit switching audio amplifier.