|
Technobabble Post your general Need for Help questions here.
• Lossy or Lossless? Moderators |
|
Thread Tools |
#16
|
|||
|
|||
Re: vinyl to flac?
One other thing. Some sound cards can induce noise. So what I do is a make a 2-3 second silent wav before I record. Another on after teh first side of an album is done and another when both sides are done. This is to see if the noise of the sound card changes with time/temperature.
Then I compare these silent waves via the noise profile, If they're pretty close then i just use one as a noise profile to run the noise filter. Also, what I do is I get a noise profile from the silence at the beginnng of the lp, between tracks, and at teh end of the lp. I then run noise filter using the noise profiles from the silence that surround tracks on each side of the silence. this gets rid of any "needle" noise. Needle noise changes as a function of the needle's distance from teh center. Obviously if you have a live album you can only sample the beginning and end of the lp for noise but that would be fine. Make sure any selection you are getting a noise profile from contains no music. Hafta becareful at track endings and find where the fade is actually silent. Live albums won't have this problem tho. Now if anyone questions this method of reduceing noise, I'd be glad to provide a before and after sample of an album I've done in this manner. I'm on dial up atm so I'd hafta send a disc through mail. Here's a good forum tht can address any questions regarding sound forge and cep/adobe aduiton http://www.audiomastersforum.org/ No members have liked this post.
|
#17
|
||||
|
||||
Re: vinyl to flac?
Quote:
__________________
Through the clouds, Throught the lies, We'll never see, What's never been, At the ending of life and the coming of death, Pass not through its gates but into the dark. No members have liked this post.
|
#19
|
||||
|
||||
Re: vinyl to flac?
Quote:
Now, you're getting into using Effects>Noise Reduction>Noise Reduction which is what RainDawg would call a black art (it seems that he's calling everything a black art these days--just kiddin' ). In the pro audio world you're dealing with real audio engineers but over here we're in the land of audiophiles, some of whom are completely against nr after seeing too many shows "fixed up" by amateurs and subsequently ruined from using heavy handed nr of this kind. People trying this for their first and second time will have a lot of trouble hearing the artifacts, this is how it was for me too. I had to have a friend tell me "I can hear the nr working, you fucked it up" before I became aware. Anyhow, I'm very interested in this technique. I used to have one of those "linear tracking" turntables where the needle was always straight but I haven't seen them around for a long time. Let's say that I transfer a radio transcription disc I have. I get a friend who's a DJ to bring over a Techniques 1200 with topflite needle and phono preamp, then record a side. Side 1 is 20 minutes with a short silent break in the middle where the commercial goes. I get three really nice smooth noise samples beginning and ending on the zero crossings with no bumps. Now how do I appy this? I could run nr 3 times, using the first sample for the first 6.5 minutes, second sample for the next 6.5 minutes, third sample for the last 6.5 minutes... I'm concerned that it won't be seamless or am I over-analyzing?
__________________
Checksums Demystified | ask for help in Technobabble thetradersden.org | ttd recommended free software/freeware webring shntool tlh eac foobar2000 spek audacity cdwave vlc Quote:
No members have liked this post.
|
#20
|
||||
|
||||
Re: vinyl to flac?
Quote:
I learned the ills of Noise Reduction the hard way....by trading for stuff where people had abused it. I developed such a disgust for it, that I started reading more on how it works, and then trying it my own ways.....just to make sure I could make accurate criticisms of those recordings I hated. It's not easy...."Remember kids, audio engineers are trained professionals. DO NOT TRY THIS AT HOME!".
__________________
Through the clouds, Throught the lies, We'll never see, What's never been, At the ending of life and the coming of death, Pass not through its gates but into the dark. No members have liked this post.
Last edited by RainDawg; 2004-12-05 at 10:49 AM. |
#21
|
|||
|
|||
Re: vinyl to flac?
Quote:
Trying to filter noise that's in the background of music is rather difficult and I agree that this should be left to professionals. I'd never attempt it. Not yet any way. But you'd be surprised at how much noise you can filter out just by using a noise profile from the sound card (silent wav) and at teh beginning and end of an lp. I share your concerns about the masses trying to use filters. Maybe a system could be set up for people to record their lp's and send the wavs/shn's to someone here that can do the noise reduction. Definitely not for the mases to try since there's alot of...well let's just say well meaning but inexperienced people. Over analyzing? Or just gun shy? When you make a noise profile all you are doing is taking a known noise sample and removing it. IF the noise exists it's removed. If it doesn't exist nothing is done. When running a nosie filter in this manner you can watch the wav form change when the noise is filtered out. Run the noise filter again and no change. Try it In your example, it wouldn't matter if you ran all 3 profiles over each section. It's just more work. I've found that when i use a noise profile say from the silence at beginning of the track, not much is left for the noise profile at teh end of a track. But use the noise profile at teh beginning of the lp on the last track and then run the noise profile at teh end of the lp and you'll see more noise is filtered. That's from the physics of playing an lp. Too deep for me to understand fully but I don't need to lol.. Now I must emphize that when taking a silent sample for a noise profile it's very important that no music is present. I get to the end of a track, crank up the volume (my puter's hooked to stereo) and listen to find the place where's there's no music. Even a string slightly vibrating can affect teh music since it's part of the profile. If the beginning of the next track fades in then I write the time down for the end of a track and find where the sound is beginning. You only need a small sample. I try to get a 2-3 second sample. But sometimes yuo can't get that. Another thing. Make sure any clicks/pops are removed in teh area you're taking your sample from. If useful, I can write a tutorial complete with screenshots. I don't have the web space for images tho. And if anyone doesn't have a problem with trading outta print material, I'd be glad to send someone a before and after sample and I'm sure you'll agree the noise reduction technique here is worthy of mastering vinyl boots. PM me if ya want a sample. I'll send something to one operson and they can be the ears of the group and/or pass it around. One group from the late 70's early 80's I've worked on is the Rockets. A detroit area band with guitarist Jim McCarty formly of mitch ryder and cactus. I've recorded and cleaned up all 5 of their studio albums. Oh about that forum. I believe many people are muscians and am not sure how they'd take to free distribution of boots so might want to conceal this. No members have liked this post.
|
#22
|
|||
|
|||
Re: vinyl to flac?
Thanks for the site, moemusic.
I'd read about the process of taking samples of "silent" parts of the source for use as a noise profile. I've even used it a few times on some of the material I have. It is a tricksy thing to get right. I did not know about the possibility of a time/temp variation! More complexity. Whoo! More reading too. Should keep me warm and busy this winter on these cold Buffalo nights. And I thought it was hard learning to build Tube Amps! No members have liked this post.
|
#23
|
|||||||
|
|||||||
Re: vinyl to flac?
Quote:
Quote:
Quote:
Also, I find it useful to turn off my computer system sounds when doing nr work... I've almost had my head ripped off a couple times when I had my volume turned up to 20 and windows goes "DUNT!!!". Quote:
Quote:
Quote:
__________________
Checksums Demystified | ask for help in Technobabble thetradersden.org | ttd recommended free software/freeware webring shntool tlh eac foobar2000 spek audacity cdwave vlc Quote:
No members have liked this post.
|
#24
|
||||
|
||||
Re: vinyl to flac?
Quote:
So I always look for ways to isolate the temp variable. My sound card doesn't seem to have any difference due to temperature. But I always check since it doesn't take too long to make the silent wavs. Quote:
Quote:
Quote:
Thanks for the link for the image shack. I'll get to work on a tutorial. Maybe I can have it done in 7-10 days. Don't hold that to me tho hehe Now, are there any John Cougar Mellencamp Fans? If so, I recorded his 11-11-04 A&E live by request show onto my computer. I edited the show to remove all the commercials, talking and such so that it sounds like a continous show. If anyone's intersted in seeding the show, pm me and maybe we can work out a small trade or bnp. No members have liked this post.
|
#25
|
|||||
|
|||||
Re: vinyl to flac?
Quote:
Quote:
Quote:
Quote:
__________________
Checksums Demystified | ask for help in Technobabble thetradersden.org | ttd recommended free software/freeware webring shntool tlh eac foobar2000 spek audacity cdwave vlc Quote:
No members have liked this post.
|
#26
|
|||
|
|||
Re: vinyl to flac?
Quote:
Quote:
Quote:
I do have some jcm show I got in audio format. One is from 84 and is mostly an accoustic set on the famed wmms coffee break show in cleveland. But the other shows are great with lots of the oldies all soundboard. Check your pm's as I'll send you a link to my list if you're interested. No members have liked this post.
|
#27
|
||||
|
||||
Re: vinyl to flac?
Quote:
__________________
Checksums Demystified | ask for help in Technobabble thetradersden.org | ttd recommended free software/freeware webring shntool tlh eac foobar2000 spek audacity cdwave vlc Quote:
No members have liked this post.
|
The Traders' Den |
Similar Threads | ||||
Thread | Forum | Replies | Last Post | |
The Rolling Stones xxxx-xx-xx Necrophilia - unreleased vinyl - Label mecca (FLAC) - quadrophenia | Audio Torrents | 141 | 2024-05-22 10:50 PM | |
Vinyl analogue to FLAC transfers - alg | Technobabble | 39 | 2005-12-12 03:09 AM |
|
|