msiegel Star

Tags  →  audio

i was wondering how these work the other day


an outstanding, must-see art piece. really incredible in person
yikes, is there some simpler way of making an analog shift register??
Denon AKDL1 Dedicated Link Cable
// ouch... but at *that* price, maybe a lambasting is deserved
using transistors or opamps to buffer a signal, so the signal doesn't distort (due to too much current being drawn from the signal's source)
really neat, and relaxing -- realtime audio from underwater, under the Antarctic ice

sea animals are out tonight!! :D
excellent work. classic recordings can now be automatically picked apart for use in new compositions... with high sound quality
From the page: "Not only am I unintimidated by litigation; I sometimes rather miss it." thanks to ar0cketman :)
a *very* interesting design... i like the virtual ground & capacitance multiplier power supply noise-reduction
why can't playback devices do dynamic-range compression on the fly -- if we want it :(
guy builds a PWM class D audio amp from vacuum tubes, hahaha! a very cool idea
fantastic 1950's product introduction; steve jobs couldn't have done it better




Nelson Pass designs a JFET power amp in this article, and you can make one too :D
from the page:
"In the 1930s radio pioneer Guglielmo Marconi developed a system of magnetic sound recording using steel tape. This was the same material used to make razor blades, and not surprisingly the fearsome Marconi-Stille recorders were considered so dangerous that technicians had to operate them from another room for safety. Because of the high recording speeds required, they used enormous reels about one metre in diameter, and the thin tape frequently broke, sending jagged lengths of razor steel flying around the studio."
what a great audio PSU trick! :D

From the page: "there is a trick to further reduce PSU voltage drop and ripple in stereo LF arrangements. This is achieved by inverting the input signal of one of the channels and reversing the polarity of the load. As a conequence of that, both channels will seldom be drawing current from the same supply rail at the same time and PSU efficiency will be improved."
info on standard audio connectors, voltages, currents
"Low-Cost Audio Delay Line Uses 1-Bit ADC"
neat idea, and very cheap :D
Good idea, I'm going to try this.

Update: It works! I built the one-transistor amplifier on this page to boost the mic output up to line level for my Mac mini:
http://www.diylive.net/index.php/2005/12/19/ten-most-needed-circuits-for-the-diyer/
From the page: "an overview with specific pros and cons of the different approaches"
From the page: "What is needed to make a "good" audio Class D amplifier"
From the page: "eliminate cross conduction by forming back-to-back diodes with the body diodes of the MOSFETs".
I wonder if this technique has applications in class b or d audio amplifier design...