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Audio from vinyl (24 / 96-192 khz). Converting/downsampling?
Taishou
post Aug 27 2012, 03:01
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Hi again

I have several digitized vinyls in FLAC, at 24 bit, 96-192 khz. Is it worth all that sample rate? I was thinking of making CD quality (16/44.1) FLACs or even mp3 320. I doubt I'll ever in my life spend more than, idk, 200 usd in headphones, so the over-quality looks a waste. What do you say? I'm far from an audiophile and I feel pretty happy with mp3 320 (I can't even tell from FLAC).

Anyway, I need to re-encode that at least for my mobile devices. Should I have any special care when converting? I use fre:ac (LAME 3.99.5). Should I just set 44.1 khz when encoding there and done? Or should I downsample with another tool and then encode? I just tried encoding something setting 44.1 in LAME and the result sounds the same as the original 24/192 (with my crappy headphones at least).

The same goes for FLAC or ogg (I tend to use the latter for my DAP). Just setting the sample rate when encoding is enough or is it better to do it with another program? (I doubt, but I wouldn't like regretting later because I made a crappy conversion).

Thanks!


(maybe this should go in the "vinyl" forum, but my concern is more with those high sample rates and downsampling, regardless the source)
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Taishou
post Aug 27 2012, 08:25
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Sorry for the double post, I can't see an 'edit' button on my post anymore sad.gif


Anyway, I just checked other FLACs I have that are supposedly 24 bit, but in Audacity show up as 32 floating point. Foobar says 24, as it should be. Forget every time I said "32 bits" before, it's 24 actually tongue.gif


I'm thinking of making 96 khz, 24 bits FLACs, keep those and discard the huge 192 khz monster. It's not going as low as 44.1, and the file size is ok for me. What do you say? One question remains: if I downsample from 192 to 96, and then those 96 to 44.1 (I'll keep the 96 khz one as "master" and the other for mobile playback), will I have any [perceptible] loss than if I went from 192 directly to 44.1? I just tried and the graphs look identical in both cases.


Thanks for your patience, I'm new to all this.

This post has been edited by Taishou: Aug 27 2012, 08:27
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Porcus
post Aug 27 2012, 10:14
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Go 44.1 or 48, as those are the well-supported sample rates. (CDs are 44.1 as you know, but the AC97 soundcards came with 48 kHz only and had to resample the 44.1 (at quality that has been discussed ever since). Don't think it is a problem anymore, but ask someone else -- myself I am using an external DAC that eats pretty much everything).)

16 bits is compatible with everything that supports FLAC, it should be sufficient for the human ear, and should be more than plenty for vinyl rips. But in order to get 16 bits, then your files must actually use the most significant ones. Try running a ReplayGain scan and see what the peaks are like.


QUOTE
No way to tell a difference, even in the graphs

Graphs are not really useful (well they may be for certain purposes under certain circumstances, but not this). Gross visual differences may fail to be audible, and pretty significant audible differences won't be detected visually (at least not without practically useless zooming, inspecting a split second at the time).



[Oh ... edits are only allowed for a limited time. Is it 1hr?]

This post has been edited by Porcus: Aug 27 2012, 10:18


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Posts in this topic
- Taishou   Audio from vinyl (24 / 96-192 khz). Converting/downsampling?   Aug 27 2012, 03:01
- - Porcus   QUOTE (Taishou @ Aug 27 2012, 04:01) I ha...   Aug 27 2012, 06:16
- - Taishou   I see... Thinking about it I'll stay with FLA...   Aug 27 2012, 06:57
- - Taishou   Sorry for the double post, I can't see an ...   Aug 27 2012, 08:25
|- - Porcus   Go 44.1 or 48, as those are the well-supported sam...   Aug 27 2012, 10:14
||- - db1989   QUOTE (Porcus @ Aug 27 2012, 10:14) [Oh ....   Aug 27 2012, 14:38
|- - splice   QUOTE (Taishou @ Aug 26 2012, 23:25) ... ...   Aug 27 2012, 21:37
- - jensend   Try the FAQ for good info and advice. Also this pa...   Aug 27 2012, 16:45
|- - benski   QUOTE (jensend @ Aug 27 2012, 11:45) The ...   Aug 28 2012, 18:37
|- - Woodinville   QUOTE (benski @ Aug 28 2012, 10:37) QUOTE...   Aug 29 2012, 03:27
|- - krabapple   QUOTE (Woodinville @ Aug 28 2012, 22:27) ...   Aug 31 2012, 14:08
- - jensend   Oh, BTW: resampling in multiple stages is unlikely...   Aug 27 2012, 17:06
- - Taishou   Great answers, thanks. I just read the links you p...   Aug 27 2012, 20:56
- - jensend   If you're already using SoX, no reason to not ...   Aug 28 2012, 00:09
- - Taishou   QUOTE (splice @ Aug 27 2012, 17:37) QUOTE...   Aug 28 2012, 05:40
|- - Porcus   QUOTE (Taishou @ Aug 28 2012, 06:40) Afte...   Aug 28 2012, 07:42
|- - jensend   QUOTE (Taishou @ Aug 27 2012, 22:40) Afte...   Aug 28 2012, 17:34
- - db1989   Itís a result of one of audioís many compound myth...   Aug 28 2012, 07:09
- - Woodinville   There is some use to that over-20kHz stuff, though...   Aug 28 2012, 08:16
- - Arnold B. Krueger   QUOTE (Taishou @ Aug 26 2012, 22:01) I ha...   Aug 28 2012, 12:40
- - greynol   We had the same inconvenient point raised about th...   Aug 28 2012, 20:32
- - Taishou   Thanks for all your input, it's really great ...   Aug 29 2012, 02:48
|- - Porcus   QUOTE (Taishou @ Aug 29 2012, 03:48) Shou...   Aug 29 2012, 15:05
|- - jensend   QUOTE (Taishou @ Aug 28 2012, 23:47) If i...   Aug 29 2012, 15:13
- - Taishou   If it matters of something, the files with clippin...   Aug 29 2012, 06:47
- - Porcus   But ... if the peak measures to 0.999, and the res...   Aug 29 2012, 20:43
- - pdq   The resampling produced samples that were beyond +...   Aug 29 2012, 21:02
- - Taishou   Well, I decided to leave it as it is. I tried the...   Aug 29 2012, 23:30
- - greynol   Re. compression: I've seen worse. At the end ...   Aug 29 2012, 23:41
- - Taishou   Indeed. And it's the same on the source, so it...   Aug 29 2012, 23:51
|- - Porcus   QUOTE (Taishou @ Aug 30 2012, 00:51) it w...   Aug 30 2012, 07:35
- - greynol   Could it be due to possible inter-sample overs occ...   Aug 30 2012, 02:51
- - greynol   Off-topic discussion on the SNR or MP3 has been sp...   Aug 31 2012, 19:48


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