
Originally Written by
BrunoRepublic
Then I'll explain.
RCA jacks are the jacks you find on standard stereo equipment, usually in pairs, with one red and one white (for right and left channels).
A 3.5mm jack is the mini-jack you'll find on most computer sound cards. It's the same kind of jack that you'd plug your iPod/walkman headphones into.
Line-level is something of a standard, and the only reason I mention it is that you can't plug something that is line level (like a cassette deck) into a mic jack, because you'll get huge distortion. Most sound cards have separate inputs for mic and line.
For a very modest sum of money, you can get a cable that has RCA jacks on one end, and a 3.5mm jack on the other. Connect one to the tape deck and the other to the computer, and voila. Go into the Windows mixer and mute anything that isn't the line in, fire up Audacity, and hit record. No need for a whole new cassette deck, and your old one probably sounds better than some plastic USB device anyway. Good quality cassette decks simply aren't manufactured anymore at all, since the format is dead.
Now, Turntables are an exception, because they're the one stereo component which *isn't* at line level. They require both additional amplification and EQ or they will sound very very quiet and have almost no bass. Records are deliberately cut with the highs boosted and the bass flattened, and you need something in between to correct this as well as boost the volume up.
Back in the day, all stereo systems included special phono inputs that took care of this. Nowadays you usually need to buy a separate component, called a pre-amplifier or a phono stage. So you first connect the turntable into a phono stage, and then connect that to your main amp, or computer, or whatever.
Low quality audio aside, the big problem with USB audio devices (aside from the fact that compatibility is not guaranteed, but that's another matter) is that they are quite likely to be obsolete and largely unusable in the near future. Every time Microsoft updates Windows (or Apple updates OS X), MANY of the drivers for these things either break or become unstable. So if you get a new computer, or sometimes even download a system update, you'll have to wait for the manufacturer to come up with new drivers... if they do at all. It's quite common for manufacturers to stop supporting older models and require you to either stick with outdated computers, or upgrade your equipment. That way they can sell you another turntable.
Meanwhile, a decent turntable made 30 years ago is still every bit as usable as the day it was made.
FWIW, I do actually make regular use of a USB audio device, in the form of my external sound card (which gives somewhat better sound than the regular built-in kind, but those would be fine for most people). But even then, it's not a simple matter of plug-and-play. When I first got it, the Mac drivers were barely functional. After a few months, they issued an update, but it still does oddball things on the Mac, so I only use it on Windows. Meanwhile, I did some reading, and computers with certain types of motherboards can't make use of this thing at all. So much for "universal" serial bus!
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