October 29, 2004
transient perfect
The idea of transient perfect.
A musical signal (or any wave for that matter) is very complex, often consisting of many different frequences superimposed upon one another. The perfect example of this is a square wave. A true/ideal square wave is composed of all frequencies. Because of this, when frequencies are phase shifted due to physical or electrical characteristics, the superposition of waves of different frequencies becomes distorted. Hence, our square wave, when introduced to phase shifts is no longer a square wave. It may not even closely resemble a square wave. So the idea of a transient imperfect filter sounds like a horrid idea. The harmonics of our signal become jumbled and the signal can be changed quite dramatically. Keep in mind, we're still talking about the time domain here. Once we switch to the frequency domain, things may look slightly better. The frequency response of our filter may not look half bad. In fact, the frequency response might look quite good. Just look at a 2nd or 4th order Linkwitz-Riley filter connected to drivers with time-aligned acoustic centers. The frequency response of this system is nearly flat in the pass band. This tells us that our filter will pass our signal with a minimal amount of distortion to our signal in terms of frequency attenuation/amplification. But by looking in the frequency domain we lose sight of the transients of our signal. Sure the filter may pass frequencies without attenuating them, but it may delay them, which still changes the output of the filter with repsect to the inputted signal.
October 20, 2004
DAC'in it up
The DAC came and I finally have my new speakers set up right next to my laptop, just as I wanted them. Listening in the nearfield is fucking sweet. I'll post a little more about the setup later. Here's a pic.
October 14, 2004
Figured Out
So I just figured out what I want to do with myself. I'm gonna start a business with Dave and Jared. It'll be called JDJ. See it works out well; does the first "J" stand for Jon or Jared? who knows? Yeeeeaaa, you like it. Anywho, on to the more important stuff. Our business is going to be crazy successful because we're fucking brilliant people. Ok, maybe not brilliant, but at least smart and motivated. Once the business becomes really successful I'm gonna start travelling all over the place. I'm gonna live off my bike. I'll probably hit up Mexico first, by the coast somewhere. It'll be just me, warm weather, the beach and my bike. I'll just pedal all over the place. Oh, and I'll hang out with the locals and drink shady Mexican beer and do shots of tequila from bottles with worms in 'em. Once my skin gets so tanned that I start to look slightly mexican, I'll come back. I won't be gone for that long, maybe a couple of weeks or so. Then maybe I'll start travelling to more exotic countries (not that mexico isn't exotic) but maybe somewhere that has wombats or wild elephants or pumas. Are there any pumas in North America? Man, this is going to KICK ASS!
October 12, 2004
how'd i forget
So my friday was really really shitty. I swear I thought I was going to have some sort of breakdown or go into a rage or maybe both. So I tried taking a nap. That didn't work. Next option, cruise along on E-bay and buy something. So that's what I did. Well, actually I found the item at audiogon.com, but heck, it's almost ebay. It was/is probably a dumb idea to buy things off audiogon because they're not a real auction site. SO what did I buy? It's an Adcom GDA-600 DAC for $150. I can't really afford to be throwing money around, but I did improve my friday mood considerably. I'll post a pic of it and rave about it a little more once I get the thing.
October 4, 2004
My Question
You'll notice my posts have become more about life issues rather than cycling and audio. Kinda depressing, which leads me to why I'm posting. How much is too much and when does worth it turn into not worth it. I'm talking about school of course. It seems like all I ever do during the week is homework. Usually I spend no more than 2 hours a day doing stuff that isn't school related. And, Yes, it fucking sucks. I know college isn't supposed to be a breeze, but sometimes I wonder when is it too much? I'm tired (literally and figuratively) of only getting 3 hours of sleep every night. I'm tired of not being able to relax. Most of all, I'm tired of not having time to reflect on life and things that are going on. Everytime I try and tell myself to just say "fuck it" and care a little less about doing everthing perfectly it doesn't happen. Maybe I just don't know how to manage my time, or maybe I'm just too uptight about grades. Well, there isn't really a point to this post other than I need to do some serious thinking. Hmmm. . . But when? And on that note, I'm off the class AGAIN.