Categories: Misc / DotNet / Java / Coder / Linux / PHP Ask - La ask - La Answer

which aac bitrate do you encode in and why?

so here?s for those who?ve already imported cd?s using itunes for windows.
[74 byte] By [m.r.m.] at [2007-11-9 14:42:02]
# 1 Re: which aac bitrate do you encode in and why?
I used to go with 128 b/c it is the default, but I have a 30gb iPod and 60gb hardrive so I figured I might as well go with better quality 192 since I have the space.
jkads3 at 2007-11-15 16:47:38 >
# 2 Re: which aac bitrate do you encode in and why?
10gb iPod and I need all the room I can get. I did testing before I started and found the 128's to be plenty acceptable.
MikeM at 2007-11-15 16:48:38 >
# 3 Re: which aac bitrate do you encode in and why?
I use 96kbps AAC that I converted from 192kbps MP3s...I do notice a slight degradation in quality though. I'm thinking about re-encoding at 128.
SickBeast at 2007-11-15 16:49:37 >
# 4 Re: which aac bitrate do you encode in and why?
192 is the bitrate to have IMO, because its not too big, but is still pretty much indistinguishable from the original.
Adam at 2007-11-15 16:50:31 >
# 5 Re: which aac bitrate do you encode in and why?
I've dipped my toe in the AAC water by ripping a few CDs at 192k. The quality seems excellent - certainly on a par with LAME --aps, in which my CD collection is currently ripped.

I don't think I'll bother replacing my existing --aps rips, but I'll probably use AAC 192k for ripping newly purchased CDs (just so I can do everything in iTunes and be happy about quality).

I like to keep my iPod's contents down to ~6GB or ~1200 songs - I just can't cope mentally with much more than that on the iPod's interface - so file size isn't much of an issue.
Sam Williams at 2007-11-15 16:51:41 >
# 6 Re: which aac bitrate do you encode in and why?
i'm one of the rare ones it seems...

i used to rip at 320 mp3, and switched to 256 aac the other day as they seem "equivalent" (note that's not equal). they both have their issues but i like aac's sound a bit better. it's also a bit smaller.

size has never been my biggest worry, mainly perceived sound quality.
SkippyMcHaggis at 2007-11-15 16:52:41 >
# 7 Re: which aac bitrate do you encode in and why?
I chose 192. It sounds transperent on all my music except for one track, autechre - second bad vilbel, and it's really not that noticable. I'm not going all the way up to 224+ just for one track.
c4lx at 2007-11-15 16:53:34 >
# 8 Re: which aac bitrate do you encode in and why?
Can you really tell the difference between 128 and 192 using a good pair of cans like Ety 4Ps?
eriklarson at 2007-11-15 16:54:37 >
# 9 Re: which aac bitrate do you encode in and why?
Well, it all depends on how much you expect from sound and what music you listen to. I know I listen to very 'busy' music, and I can certainly tell the difference between them, but as for saying what that difference is, well I don't really know.
Adam at 2007-11-15 16:55:38 >
# 10 Re: which aac bitrate do you encode in and why?
I don't think this gets said often enough: being able to actually discriminate between two bitrates isn't everything.

There's plenty going on in a typical piece of music which goes unnoticed by the conscious mind, but still has an effect on what you take away from the experience. Bitrate differences might not be detectable during active listening, but that doesn't mean you'll feel the same about a song after listening to X kbps and Y kbps versions.

My point is inherently unscientific. The current trend, on the other hand, is for "rigorous" scientific testing of bitrate vs. bitrate. That's fine, as far as it goes - but it can only deal with the consciously perceived elements of the music. The elements which slip into your brain under the radar are another matter entirely, and no amount of active listening will allow you to legislate for them.

To clarify: if you -can- tell the difference between two bitrates, you should certainly rip in the higher one. But if you -can't-, don't think that you'll have the same listening experience with both.
Sam Williams at 2007-11-15 16:56:39 >
# 11 Re: which aac bitrate do you encode in and why?
interesting thoughts, Samwise...sort of the sub/un-conscious approach.

to add an "active listening" point in support of that as well:

lower bitrates lose data, there's no denying that. so even if you don't hear what isn't there, has anyone ever noticed something new in a song they have listened to a billion times before? i know i have. you might miss that at super low bitrates.

just another "unscientific" thought.
Skip

*edit* fixed some coherency issues.
SkippyMcHaggis at 2007-11-15 16:57:48 >
# 12 Re: which aac bitrate do you encode in and why?
192, perfect balance of quality and size.
SteveB at 2007-11-15 16:58:47 >
# 13 Re: which aac bitrate do you encode in and why?
lower bitrates lose data, there's no denying that. so even if you don't hear what isn't there, has anyone ever noticed something new in a song they have listened to a billion times before? i know i have. you might miss that at super low bitrates.Absolutely, yeah - happens all the time to me. Often it's just something like the sound of a sax valve closing - musically irrelevant but all part of the 'mood' - but I frequently pick up little counter-rhythms that I hadn't noticed before. One of the best bits about music, I reckon - always something else in there :-)
Sam Williams at 2007-11-15 16:59:42 >
# 14 Re: which aac bitrate do you encode in and why?
Originally posted by eriklarson
Can you really tell the difference between 128 and 192 using a good pair of cans like Ety 4Ps?

>> I just got my 40G iPod (Windows). Ripped 2 CDs at 128 and noticed that there was a LOT of sound missing. Re-ripped at 192 after reading up on it. So far, the sound quality is very enjoyable.
>> BUT, there is another thread on this forum from Androo(10/22/03) suggesting to rip to FLAC (in permanent storage) and then subsquently batch-ripping to whatever the current best format is OR what the current players will play. Andoo's concerns were very valid and, as soon as I figure out about FLAC, that's exactly what I will do.
>> Is there a "slang" dictionary? What is "cans"? I figure it means external speakers. Care to educate me? Thanks!
William Tell at 2007-11-15 17:00:48 >
# 15 Re: which aac bitrate do you encode in and why?
"cans", n. (pronounced "Kaanz") a set of headphones.

I encode in 224 AAC. It seems to be a good tradeoff. I don;t have my iPod yet, but am getting a 40gig one. I'm not terribly concerned about space, but not willing to just load up with wav files. What is the advantage of permanent FLAC storage (i.e what is the size savings over wav...if I assume the storage savings is the real issue here)? Thx,
ted_b at 2007-11-15 17:01:50 >
# 16 Re: which aac bitrate do you encode in and why?
I've been ripping everything as 128k AAC, partly because I didn't realize you could set it to a higher quality setting.

But, mainly because my old 20G player was already full, and I previously had my collection ripped as 128k MP3.

So 128k AAC is a step up from what I've been subjecting myself to previously. And, I've already broken the 20G mark and still have 100's of CDs to go...(I have a 40G iPod).

The Dreamer
TheDreamer at 2007-11-15 17:02:43 >
# 17 Re: which aac bitrate do you encode in and why?
Originally posted by ted_b
"cans", n. (pronounced "Kaanz") a set of headphones.

I encode in 224 AAC. .. am getting a 40gig one. I'm not terribly concerned about space, but not willing to just load up with wav files. What is the advantage of permanent FLAC storage (i.e what is the size savings over wav...if I assume the storage savings is the real issue here)? Thx,

Re: FLAC vs. wav. Go to http://FLAC.sourceforge.net for a very detailed discussion of this format.

The referenced message was concerned about having to re-rip hundreds of CDs if a new format came out. He/she wanted to rip to the highest quality (lossless) regardless of space limitations, and then, when a new standard or device came out, the ENTIRE CD collection could be batch-converted to the new standard without having to go through the process of re-ripping hundreds of CDs ONE by ONE. A very convincing article.
William Tell at 2007-11-15 17:03:51 >
# 18 Re: which aac bitrate do you encode in and why?
I've ripped a few at the default 'high quality' setting which I believe is only 128. Haven't been impressed. Compared to 192 mp3s that have been through mp3gain these aacs are too loud and the bass hates the EQ settings even more than the mp3s.
So much for 128 AAC = 192 MP3
ChrisMatchett at 2007-11-15 17:04:49 >
# 19 Re: which aac bitrate do you encode in and why?
Originally posted by ChrisMatchett
So much for 128 AAC = 192 MP3

In my experience (i'm an avid music fan, but my ears are pretty bad from years of loud music and standing too close to speakers at punk rock concerts), it's more like a one-step difference... such as, 128k AAC is about equal to 160k MP3, 160 AAC ~ 192 MP3, etc. 128 MP3 to 192 AAC is two steps, a bit too far to be a good comparison.
seinman at 2007-11-15 17:05:47 >
# 20 Re: which aac bitrate do you encode in and why?
256

ive been a portable cd player listener for about 6-7 years now, and i dont particulary want to miss out on any level of quality..i'd get so angry if a song i'd been listening to for years sounded strange. i'd pick up on it straight away.

through the headphones i have i cant hear a difference between 256 and 320, but i can hear a difference between 256 and anything lower. im lucky that i have a 40, as im not worried that by 200 albums aren't gonna fit. most of my mp3s are 192, which is good as well.

i was gonna rip at 214 originally but i heard a bit of a funny edge to one of the songs, so i thought i'd go nuts.

personal prefference really. i think something below 160 is a shame.
Ochire at 2007-11-15 17:06:47 >
# 21 Re: which aac bitrate do you encode in and why?
I have a large collection of downloaded music that was aquired before they became "illegal" to share. Most of the stuff out there was ripped poorly so they didn't deserve being re-encoded at 128kbs. I use 80Kbs for this stuff. It still sounds pretty decent considering most of the stuff sounds bad already.

For albums and the legal stuff i buy lately, i encode at 128kbs. just to save space.
ILoveMusic at 2007-11-15 17:07:54 >
[an error occurred while processing this directive]
[an error occurred while processing this directive]