IPB

Welcome Guest ( Log In | Register )

16 bit vs 24 bit, any samples that work?
AndyH-ha
post Nov 3 2006, 03:19
Post #1





Group: Members
Posts: 2192
Joined: 31-August 05
Member No.: 24222



There are real differences between 16 bit and 24 bit files, just as there are real differences between uncompressed and mp3. As with the differences between wav and mp3, 16 bit vs 24 bit is often difficult to identify by listening.

Test signals are one thing, but has anyone found any 24 bit music recording that can be successfully identified via ABX testing against a properly resample to 16 bit version of same?
Go to the top of the page
+Quote Post
 
Start new topic
Replies
AndyH-ha
post Jan 22 2009, 22:12
Post #2





Group: Members
Posts: 2192
Joined: 31-August 05
Member No.: 24222



I ‘m going to see if I can borrow a fast connection to download, those files are just too big for this dial up.

As I specified before, only the 24 bit source is of interest. I know I can convert properly; possible audible differences with other conversions to 16 bit are of no value. Tests based on them on very suspect. I understand most anyone can do a proper conversion, given the necessary software, but a fuller specification of the particular process employed is desirable.

Blue printing on a black background is extremely difficult to read. Under most circumstances that kind of presentation is enough to make me very quickly decide the site is not worth the bother. I still haven’t figured out all the headings on this one.
Go to the top of the page
+Quote Post
Martin Kantola
post Jan 23 2009, 05:01
Post #3





Group: Members
Posts: 38
Joined: 21-January 09
Member No.: 65841



QUOTE (AndyH-ha @ Jan 22 2009, 16:12) *
I know I can convert properly; possible audible differences with other conversions to 16 bit are of no value. Tests based on them on very suspect. I understand most anyone can do a proper conversion, given the necessary software, but a fuller specification of the particular process employed is desirable.


What exactly do you need to know apart from the dither used? Please let me know. While I understand that this is slightly controversial, we have to remember that most professional audio is done in 24 bit today, probably for good reason. So we could at least suspect an audible difference. But it's a good idea to download only the source file to save download time.

QUOTE (AndyH-ha @ Jan 22 2009, 16:12) *
Blue printing on a black background is extremely difficult to read.


Oh, I'm sorry, looked fine on my screen, but fixed it now! Please reload the page. Thanks for pointing that out.

Martin




QUOTE (2Bdecided @ Jan 22 2009, 07:45) *
It would be helpful if Martin Kantola could describe the differences he heard, where in the file he heard them, and most importantly can verify that his laptop plays back 16-bit and 24-bit digital audio correctly.


While the hardware of my laptop is 24bit/192kHz capable, the specs are not exactly impressive:



Will get back to the differences I heard, have to try a 16 bit padded to 24 bits to make sure it works as it should.

Martin
Go to the top of the page
+Quote Post
Ron Jones
post Jan 23 2009, 05:58
Post #4





Group: Members
Posts: 412
Joined: 9-August 07
From: Los Angeles
Member No.: 46048



QUOTE (Martin Kantola @ Jan 22 2009, 20:01) *
While I understand that this is slightly controversial, we have to remember that most professional audio is done in 24 bit today, probably for good reason. So we could at least suspect an audible difference.

The primary reason we use 24-bit in production is due to the fact that 24-bit words allow for greater resolution of low-amplitude audio. In production, it's not rare to track or otherwise record a source at very conservative levels where the majority of the audio may only be effectively represented with 12 to 16 bits per sample so as to prevent full-scale clipping of rogue transients. If we were to record at 16 bits per sample, such audio would be only effectively represented with 6 to 8 bits per sample. This is especially true with certain types of recording, such as recording Foley, where often times there may be only one or at least very few opportunities to record a given sound, thus recording at conservative levels is critically important.

When audio is compressed, limited or normalized, we must necessarily bring up the noise floor to obtain an increase in volume (a decrease in dynamic range), so longer word lengths are extremely advantageous in this regard. Since most types of audio, music especially, end up passing through several layers of compression and limiting, working at or above 24-bit is almost mandatory (in my opinion) to achieve the highest quality result.

As an engineer, I never expect any audible difference between 16-bit and 24-bit for a compressed master. For a final delivery, where no additional processing is expected to be applied, 16-bit should almost always suffice.

That being said, I'll have a listen to the samples you've provided. The odds I'll be able to detect a difference is probably fairly slim, but I'll at least give it a go.

EDIT: Ran an ABX test. I didn't have the slightest chance, even listening at roughly 10dB higher than I would be comfortable listening to music at for any extended period of time. I focused my attention on the quietest passage, which begins at about 9.5 seconds and dives down to an RMS of about -41dBFS for about a second and a half. Absolutely nothing seems to stand out.

This post has been edited by Ron Jones: Jan 23 2009, 06:31
Go to the top of the page
+Quote Post
Martin Kantola
post Jan 23 2009, 06:23
Post #5





Group: Members
Posts: 38
Joined: 21-January 09
Member No.: 65841



QUOTE (Ron Jones @ Jan 22 2009, 23:58) *
As an engineer, I never expect any audible difference between 16-bit and 24-bit for a compressed master.


Thanks for the post, good explanation, I understand and agree with you. Please note that this is definitely not about a compressed master, but about our ability to hear differences between 16 and 24 bits in the first place. Hopefully also about what these possibly detected differences are from a musical perspective, because noise is hardly the issue. I should have explained myself better. Thanks for checking out the files.

Martin
Go to the top of the page
+Quote Post

Posts in this topic
- AndyH-ha   16 bit vs 24 bit   Nov 3 2006, 03:19
- - Mike Giacomelli   I'd imagine ABX would be possible if you found...   Nov 3 2006, 03:25
- - pdq   I recall a test here some years back to try to see...   Nov 3 2006, 05:33
- - Aetmos   If the clip is properly dithered, this doesn't...   Nov 3 2006, 06:22
- - cabbagerat   QUOTE (Aetmos @ Nov 2 2006, 21:22) If the...   Nov 3 2006, 07:31
|- - Aetmos   QUOTE Welcome to HA. I see this is your first post...   Nov 3 2006, 16:17
- - AndyH-ha   I agree that a good sample, if it exist in music, ...   Nov 3 2006, 09:36
- - cabbagerat   QUOTE (AndyH-ha @ Nov 3 2006, 00:36)...   Nov 3 2006, 16:25
- - Axon   I suppose it's quite easy to construct a track...   Nov 3 2006, 17:48
- - Axon   Also, how contrived can the listening environment ...   Nov 3 2006, 18:03
- - AndyH-ha   The question isn't whether or not it is possib...   Nov 3 2006, 20:18
- - Axon   Well.. how much dynamic range can you coax out of ...   Nov 3 2006, 20:38
- - AndyH-ha   I'm sorry, that went over my head. What is the...   Nov 3 2006, 21:21
- - outscape   haha nothing.. see 24 bits is purist technology. i...   Nov 3 2006, 22:23
- - greynol   I'd wager that in order to distinguish the dif...   Nov 3 2006, 22:41
- - Axon   OSHA's recommendations for 120db is that it sh...   Nov 4 2006, 01:11
- - AndyH-ha   But are you talking about real music or, effective...   Nov 4 2006, 01:56
- - Axon   My point is that you don't need a "test s...   Nov 4 2006, 02:21
- - AndyH-ha   OK, you need more than the dynamic range of 16 bit...   Nov 4 2006, 04:09
- - Iain   I think the best volume for the test would be ...   Nov 12 2006, 17:14
- - AndyH-ha   Without cryogenic cooling the intrinsic noise of e...   Nov 12 2006, 19:23
- - SebastianG   I think it's a good idea to mention the import...   Nov 13 2006, 13:30
- - AndyH-ha   QUOTE I think it's a good idea to mention the ...   Nov 14 2006, 03:43
|- - SebastianG   QUOTE (AndyH-ha @ Nov 14 2006, 03:43...   Nov 15 2006, 14:16
- - SirChristof   If you have decent equipment and a quiet environme...   Feb 15 2007, 09:40
|- - Kees de Visser   QUOTE (SirChristof @ Feb 15 2007, 09:40) ...   Feb 15 2007, 22:15
- - AndyH-ha   Yes, it is easy to create test tones that demonstr...   Feb 15 2007, 11:52
- - SirChristof   The vast majority of all music most of us have acc...   Feb 15 2007, 20:17
|- - krabapple   QUOTE (SirChristof @ Feb 15 2007, 14:17) ...   Feb 16 2007, 06:07
- - SometimesWarrior   These articles on ff123's website may be of in...   Feb 15 2007, 21:41
- - greynol   QUOTE (SirChristof @ Feb 15 2007, 00:40) ...   Feb 15 2007, 21:48
- - SirChristof   Greynol, What I meant to imply by "at low le...   Feb 15 2007, 22:02
- - AndyH-ha   As far as I can see, the ff123 page does not provi...   Feb 16 2007, 08:17
|- - Kees de Visser   At least one of the engineers I've asked seems...   Feb 16 2007, 11:01
- - muaddib   IMO it is better to keep samples much shorter: 10-...   Feb 16 2007, 11:54
- - 2Bdecided   There are a few 24/96 and 24/44.1 files here: http...   Feb 16 2007, 12:07
- - AndyH-ha   Setting aside for the moment whether this donated ...   Feb 16 2007, 12:22
|- - Kees de Visser   QUOTE (AndyH-ha @ Feb 16 2007, 12:22...   Feb 16 2007, 15:10
|- - Kees de Visser   An ABX test to compare 16 and 24 bit dithered audi...   Feb 19 2007, 23:00
- - AndyH-ha   I believe the resampling is more important than th...   Feb 20 2007, 00:30
- - MLXXX   Hi everyone. A year has passed since the previous...   Feb 25 2008, 16:52
- - AndyH-ha   "sounding better" is a subjective evalua...   Feb 26 2008, 00:52
- - MLXXX   I am new to ABXing but I think that for playing 24...   Feb 26 2008, 15:25
- - .halverhahn   Even it is comparing apples with oranges: Do you ...   Feb 26 2008, 17:28
- - digital   Wow: Nov 2nd 2006 to Feb 27th, 2008… and still wai...   Feb 27 2008, 10:37
- - knutinh   Since DVD-A can now be ripped, having 24/96 stereo...   Feb 27 2008, 10:43
|- - Kees de Visser   QUOTE (knutinh @ Feb 27 2008, 10:43) Caut...   Feb 27 2008, 11:51
|- - bubbleguuum   QUOTE (Kees de Visser @ Feb 27 2008, 11:5...   Feb 27 2008, 20:32
|- - MLXXX   QUOTE (volvme+ @ Feb 28 2008, 04:27)...   Feb 28 2008, 10:11
- - GeSomeone   I remember remarks (don't know where) that ind...   Feb 27 2008, 12:10
- - knutinh   I think that the difference between 12 bits and 16...   Feb 27 2008, 15:00
|- - MLXXX   QUOTE (knutinh @ Feb 28 2008, 00:00) I th...   Feb 27 2008, 16:59
- - volvme+   Sorry for interrupting your conversation, but I do...   Feb 27 2008, 19:27
- - MLXXX   AndyH, perhaps you might be kind enough to answer ...   Mar 3 2008, 07:27
- - cabbagerat   QUOTE (MLXXX @ Mar 2 2008, 22:27) Being a...   Mar 3 2008, 10:43
|- - MLXXX   QUOTE (cabbagerat @ Mar 3 2008, 19:43) ~ ...   Mar 3 2008, 13:48
|- - Soap   QUOTE (MLXXX @ Mar 3 2008, 07:48) When I ...   Mar 3 2008, 14:11
|- - MLXXX   Thanks, Soap. I should have been more precise. Wh...   Mar 3 2008, 15:06
- - SebastianG   Hi! I'd like to remind you that there...   Mar 3 2008, 11:02
- - AndyH-ha   I know this isn't the only time I raised the t...   Mar 3 2008, 12:03
- - cabbagerat   QUOTE (SebastianG @ Mar 3 2008, 02:02) I...   Mar 3 2008, 13:25
- - cabbagerat   QUOTE (MLXXX @ Mar 3 2008, 04:48) If I am...   Mar 3 2008, 15:23
|- - MLXXX   QUOTE (cabbagerat @ Mar 4 2008, 00:23) Wi...   Mar 3 2008, 15:35
- - cabbagerat   QUOTE (MLXXX @ Mar 3 2008, 06:35) QUOTE (...   Mar 3 2008, 16:17
|- - MLXXX   QUOTE (cabbagerat @ Mar 4 2008, 01:17) ~ ...   Mar 4 2008, 16:25
- - AndyH-ha   I generally issue this type of challenge when some...   Mar 4 2008, 19:45
- - MLXXX   I've a added a 24-bit 48KHz original, and 16-b...   Mar 10 2008, 16:00
- - Pio2001   Hello, In september, I did an ABX between a 96 kHz...   Nov 26 2008, 22:25
|- - Canar   QUOTE (Pio2001 @ Nov 26 2008, 13:25) Voxe...   Nov 27 2008, 00:27
||- - Dynamic   QUOTE (Canar @ Nov 27 2008, 00:27) QUOTE ...   Nov 27 2008, 05:27
|- - Kees de Visser   QUOTE (Pio2001 @ Nov 26 2008, 22:25) I go...   Nov 27 2008, 10:32
- - Pio2001   Thank you for the precisions about dither. This is...   Nov 27 2008, 19:48
- - Canar   I fully recognize that, and want to thank you agai...   Nov 27 2008, 21:18
- - solive   QUOTE (AndyH-ha @ Nov 2 2006, 18:19)...   Jan 5 2009, 01:28
- - greynol   http://www.hydrogenaudio.org/forums/index....showt...   Jan 5 2009, 01:38
|- - Martin Kantola   Greetings, found your forum recently, so here...   Jan 21 2009, 22:04
|- - Kees de Visser   QUOTE (Martin Kantola @ Jan 21 2009, 22:0...   Jan 22 2009, 07:37
- - 2Bdecided   I can't ABX it. I agree it's a perfectly g...   Jan 22 2009, 13:45
- - AndyH-ha   I ‘m going to see if I can borrow a fast connectio...   Jan 22 2009, 22:12
|- - Martin Kantola   QUOTE (AndyH-ha @ Jan 22 2009, 16:12...   Jan 23 2009, 05:01
|- - Ron Jones   QUOTE (Martin Kantola @ Jan 22 2009, 20:0...   Jan 23 2009, 05:58
||- - Martin Kantola   QUOTE (Ron Jones @ Jan 22 2009, 23:58) As...   Jan 23 2009, 06:23
|- - 2Bdecided   QUOTE (Martin Kantola @ Jan 23 2009, 04:0...   Jan 23 2009, 11:47
|- - Martin Kantola   QUOTE (2Bdecided @ Jan 23 2009, 05:47) I ...   Jan 23 2009, 16:11
- - Axon   18/32 - there's a harshness in the left channe...   Jan 23 2009, 07:56
- - 2Bdecided   Found it... http://www.gearslutz.com/board/so-muc...   Jan 23 2009, 16:30
|- - Martin Kantola   QUOTE (2Bdecided @ Jan 23 2009, 10:30) My...   Jan 23 2009, 18:41
|- - krabapple   QUOTE (2Bdecided @ Jan 23 2009, 10:30) Fo...   Jan 24 2009, 01:01
|- - Martin Kantola   QUOTE (krabapple @ Jan 23 2009, 19:01) Bu...   Jan 24 2009, 03:11
|- - krabapple   QUOTE (Martin Kantola @ Jan 23 2009, 21:1...   Jan 25 2009, 00:08
||- - Martin Kantola   QUOTE (krabapple @ Jan 24 2009, 18:08) An...   Jan 25 2009, 00:28
|- - MLXXX   QUOTE (Martin Kantola @ Jan 24 2009, 12:1...   Jan 27 2009, 10:16
|- - krabapple   QUOTE (MLXXX @ Jan 27 2009, 04:16) The ef...   Jan 27 2009, 18:57
|- - MLXXX   QUOTE (krabapple @ Jan 28 2009, 03:57) Is...   Jan 28 2009, 14:14
- - 2Bdecided   Here you go... http://rapidshare.de/files/4332135...   Jan 23 2009, 17:25
|- - Martin Kantola   QUOTE (2Bdecided @ Jan 23 2009, 11:25) He...   Jan 24 2009, 07:13
- - 2Bdecided   Thank you Martin. Putting noise in the last 8 bit...   Jan 24 2009, 21:09
- - 2Bdecided   Remember those stats are only true for the situati...   Jan 25 2009, 17:38
|- - Martin Kantola   Thanks for the info David, I'm completely new ...   Jan 25 2009, 17:59
- - AndyH-ha   This was asked more than once but there was no res...   Jan 29 2009, 11:05
3 Pages V   1 2 3 >


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 19th April 2014 - 16:19