Differences between version 18 and predecessor to the previous major change of SoundProcessingNotes.
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| Newer page: | version 18 | Last edited on Wednesday, December 24, 2003 3:09:22 pm | by DanielLawson | Revert |
| Older page: | version 17 | Last edited on Monday, December 22, 2003 10:59:44 pm | by DanielLawson | Revert |
@@ -107,4 +107,14 @@
Having written this attempt to CD, it seems pretty good. I don't have the turntable hooked up to the stereo to compare the quality, but there are no pops, very little crackle. There is some residual noise still, and the gain is still too low, which makes the noise somewhat worse. When I amplified it before processing, it was amplified to the highest gain possible without clipping - however that was based (I think) on the highest amplitude seen, which was any number of the pops that occured there were about 10 - 15 times louder than the rest of the track. I'm not sure if this will improve the effect of the noise reduction algorithms, or if it will screw things up totally, but its probably worth a shot.
Selecting a better noise sample may also help, although I suspect its about as good as I can get. I'll move onto the next vinyl for now, which I know is in worse condition in some ways (at least one scratch bad enough to cause the needle to get stuck), but may have better properties overall. And the other thing to do is to try an external amplifer/equaliser unit, although I only have the stereo the turntable is connected to, which isn't overly great. I'm open to offers :)
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+!! Fourth Attempt. Or something.
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+OK. If you're going to bother doing this, you'll probably want at least the following equipment:
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+* A good turntable. Turns out mine wasn't so hot. The stylus is probably the most important bit of this, and I suspect mine has been mistreated.
+* A decent set of headphones (for monitor purposes). And probably a decent set of speakers to check the full range
+* A preamp. The output gain from most turntables is low. This is normal. In one of the vinyls I was trying to restore, it was so low the computer wouldn't record anything. A preamp with monitor output, and simple input/output gain controls is probably fine.
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+You should also make sure your soundcard has a good SNR. The Creative Audigy 2 Platinum Ex has a good one, although it's taken ages for Creative Labs to turn this product into anything more than gamers toy. There's plenty of high-quality professional level cards that will do this very well, and cost less than the Audigy / Extigy (I checked earlier, I cant remember the manufacturer of the cards I was looking at tho, will append later).
