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A reconstructive algorithm is practically impossible. It wouldn't be able to discern between lost information and intended waveform/frequency content. The SBR algorithm, which "restores" high frequency content in MP3 and AAC, relies on sideband data to function. Any function in an amp or playback device/software is probably just a multiband compressor.
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Jul 2, 2012 01:41
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The AAC codec is pretty good at masking artifacts, because it injects noise in the appropriate areas, to prevent ringing a la MP3. At 128kbit, you'll have to deal with examples that break the codec to notice them casually on normal systems. Or you need headphones to make the artifacts out. That said, with the prevalence of compressed audio everywhere, it also remains to be seen if the effect isn't just a placebo (by knowing you're listening to compressed audio). I've had plenty examples in the past, where I thought the MP3 codec hosed up the sound, just to find out the original CD sounded the same. --very late edit: Masking, not making. Combat Pretzel fucked around with this message at 15:39 on Aug 2, 2012 |
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Aug 1, 2012 22:08
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Yeah, I'd figure something like this. Your ear is getting hammered with less varying frequencies, since the psycho-acoustic model drops about everything it deems your ear or brain would not pick up anyway.
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Sep 20, 2012 21:53
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Homeopathic levels of purity.
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Nov 22, 2012 20:47
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Yeah, right, try to have a technical discussion about digital data transmission over at Head-Fi. They'll try to convince you that their quantum-adamantium fiber optic cables brighten the stereo image and bring deeper basses.
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Nov 22, 2012 22:28
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I have seen stray videophiles before, doing the same shtick as the audiophile cable fetishists. Yeah, that 1000€ HDMI cable sure results in better colors...
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Nov 23, 2012 14:19
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Every material on earth has a certain degree of elasticity. Unless you're overdriving your speakers like hell, the vibrations aren't going to shake the suspension materials apart, unless they degrade chemically (rot or whatever).
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Nov 24, 2012 00:59
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It's like a mechanical comb filter.
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Nov 25, 2012 22:51
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Khablam posted:Found this when looking up that electrosomething creme mentioned a few posts up --edit: As far as lossy versus non-lossy goes, at certain bitrates and codec efficiency, it's a moot argument. If you'd do a delta of a FLAC and a 320kbit AAC file, you'd end up mostly with low-level white noise. Any other results in the delta happen due to frame size selection and alignment in the encoding process. The white noise would be masked away in the psychoacoustics, and the frame alignment issues are in the millisecond range the ear can't discern in, anyway. Unless you intend to re-encode ALL your music every time a portable playback device comes with a newer generation audio codec, there's zero use in lossless archiving. Actually, if you're listening to the compressed versions all the time, it may just be the actual version to you, anyway, with no need to keep an archival version. And considering how hosed up the masters are when they hit the markets (loudness wars), I think bit-perfect archiving is silly to begin with. Combat Pretzel fucked around with this message at 13:25 on Nov 29, 2012 |
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Nov 29, 2012 13:19
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I like how they call Polyethylene "Polyolefin", just so it doesn't sound like the insulation is some cheap poo poo.
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Nov 29, 2012 14:29
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jonathan posted:We had a discussion about lossless playback somewhere In this thread or another, and a couple of us theorised that a lossy format could strip away a lot of high frequency phsychoacoustics that would actually make a track sound cleaner and less fatiguing than a "full range" track with very high frequency info. Were talking inaudible but still subconsciously perceptible stuff such as cymbal crash. This stuff is scientifically proven to have an effect on people and its usually in a negative way. The same can be said for below 20hz content. But anyway, if the encodings are transparent, there's economically nothing gained by keeping bit-perfect FLACs. Because it's sure as hell a pain in the rear end, whenever I have to do a full backup of my poo poo, and it's only around 35GB of compressed music. It'd be 3-4x that in FLAC. Transcoding into every new codec of the month is also silly. If the current contemporary codec did well/transparent enough, you can keep the file in that format. Says already enough that MP3 is still prevalent, even after AAC been made mainstream years ago thanks to Apple. Don't even begin hoping that CELT goes anywhere, IETF RFC or not. Vorbis didn't manage, either.
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Nov 29, 2012 23:48
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piratepilates posted:What's wrong with playing vinyl records, don't knock it As mentioned before, you're dragging a needle made of one of the hardest materials over plastic, degenerating and as such changing the record every play. And then, the way the groove is read varies with the flex of the cantilever and the amount of counterbalance. And lets not even go into preamps and the different ways the RIAA equalization curve is implemented. Or rather approximated, since different electrical implementations of an equalizer behave differently. In short, it's a loving awful lovely medium.
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Dec 1, 2012 02:30
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Detroit Q. Spider posted:I've always said that if you want to argue for the superiority of analog you need to talk about 30 IPS tape. Most audiophiles would probably find it too sterile and clinical though.
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Dec 1, 2012 13:38
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Warm is a silly term, it means poo poo all in in audio. For me it means richer in basses. It's a worthless term.
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Dec 21, 2012 13:27
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Moronic logic. If you know they sound extremely different, you know in which ways they sound different. As such, you should be able to discern between the two with, wait for it, just your ears! But hey, one's got to justify silly buying decisions to himself.
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Dec 27, 2012 16:42
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Why the gently caress does it need four Westmere Xeon CPUs (makes most sense, 4x12MB L3 = ~50MB) and two high-end GPUs to serve apparently only music over a loving network or its audio output? Also, the CPUs are overclocked, I'm sure that generates RF noise as gently caress all over the place. ...actually, why am I even asking...
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Jan 4, 2013 23:06
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Picture quality, too, eh? I'd really like to know how a completely digital chain (both software, i.e. decoding, and hardware, i.e. HDMI) towards your digital TV and panel is in any way influenced by that PSU. I am aware I won't get a proper answer, but some voodoo magic to laugh at would be nice.
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Jan 5, 2013 16:10
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Q-tips with gold fibers in the cotton.
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Jan 9, 2013 12:25
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quote:Formula: Highly purified (99,999%) non specified substance. 
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Jan 10, 2013 01:28
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Ask them to do... wait for it... a double blind test.
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Jan 14, 2013 18:59
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Learning that radio stations gently caress with the audio before it goes on air explains why most radio stations drive me up the wall with their sound quality.
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Jan 17, 2013 20:40
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Headphones are broken in in mere seconds. The components don't move enough to venture outside of the flex in the materials used. That said, beats headphones are targeted at the sort of kids that stuff a huge bass box into the boot of their first car. Sound quality isn't a priority here.
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Feb 18, 2013 12:25
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With Monster's involvement, it should be clear that there's a huge gap between claim and fact. But the purpose of marketing in general is to sell apples as bananas. You'd think any halfwit would know this by now. But seeing the demography involved...
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Feb 18, 2013 13:04
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I love how the framerate in the video jitters like gently caress. As if his camcorder was like "FUUUUUUUUUUCK YOUUUUUUUUUUUU!"
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Feb 20, 2013 00:19
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The vinyl rotates at a specific constant speed. The vibrations picked up by the needle, which is in the cartridge at the top of the arm, going through the groove, make up the sound. The whole arm is just articulated to follow any warps in the vinyl.
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Feb 20, 2013 00:36
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RoadCrewWorker posted:Right, that's my point - the vinyl presumably has the recording on it in a constant angular velocity, and if it rotates at a constant speed the vertical deviations will change the speed of the needle on top of the material as the relative surface normal changes, resulting in a non-constant playback speed.
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Feb 20, 2013 00:55
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Which led me to this device. A "power conditioner"! http://www.lessloss.com/firewall-p-196.html Quoting the page itself: quote:No capacitors, no inductors, no resistors, no fuses, no diodes.
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Apr 11, 2013 21:05
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What's the irony with the turntable is that it has an Ortofon cartridge. That's a lowly common people brand, so what the gently caress!
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Apr 28, 2013 11:46
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jonathan posted:Why do these insanely expensive listening room and million dollar home theater owners never post measurements?
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Apr 28, 2013 18:17
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Wasabi the J posted:I'm thinking now I need to make a smear campaign on this guy, and start reselling copper audiophile tubing as wiring. Gon' be rich. (*: As in no significant diversion-wheels. Just as an example, the extrusion line I work on has around 600 meters of copper in-flight at any given moment.)
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May 29, 2013 17:48
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BANME.sh posted:There's an exploitation here that goes beyond regular audiophile bullshit.
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Jun 2, 2013 01:23
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But it's high purity!
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Jul 7, 2013 11:48
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jonathan posted:Actual measurably bad things.
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Jul 12, 2013 19:53
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Accurately reproduced flaws are considered worse than flaws that get hosed up even more?
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Jul 26, 2013 20:48
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Iamthegibbons posted:Is this as much bullshit as I suspect? On top of that you have WASAPI (WinMM in old rear end versions of Windows), which is a mixer through which all applications channel their audio via the different interfaces like DirectSound, WinMM, XAudio1/2, and so on, which sit on top of it. The WASAPI mixer operates at a set format (default is 44Khz, stereo, 16bit, but the user can change it). Anything being played in an application that doesn't match its sampling rate is going to be resampled, number of channels is going to be up-/downmixed. Application specific volume levels are applied, tho. WASAPI uses 32bit IEEE floats internally, which are then going to be dithered and converted to whatever bitdepth your output format is set to. WASAPI has an exclusive mode, which is essentially a pass-through mode to KS, which lets you select a format and play your music bit-perfect. It doesn't do any resampling or channel mixing, nor apply volume changes to the data. It blocks any other audio. If you're playing audio in the same format WASAPI is set to, the volume slider for your application is maxed and nothing else is playing, the audio should be bit-perfect, too, since WASAPI doesn't need to resample or mix channels. I doubt that going to IEEE floats and back to integers will involve any rounding errors. --edit: That said, I'm not sure about the resampling. I know for sure that it doesn't do that when recording audio. Playback, I don't know. Heard yes, back when WASAPI was introduced. Internet however says no. Combat Pretzel fucked around with this message at 20:01 on Aug 26, 2013 |
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Aug 26, 2013 19:54
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Digital streams are either fine, or broken (blocking, wrong vectors warping the image, etc.). There's nothing in-between.
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Sep 3, 2013 01:09
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I count bit errors as broken, because it doesn't let the data decompress into what it is supposed to be. lovely SNR on analog means noise. lovely bits means corrupted macroblocks, wrong motion vectors, both creating broken frames. Which is an issue, considering that several successive frames will be reconstructed from motion vectors, smearing the broken image sections all over the place. So technically, either a stream is correct or not. I guess the main point is however that a higher SNR, beyond a sufficient one to read a reliable stream, doesn't make more vivid, crisp or contrasty video. Signal fuckery may achieve that effect on an analog TV signal, but your digital decoder would just go ape poo poo and show a blank image. That said digital TV, at least in Europe, is overcompressed to boot. Ringing everywhere.
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Sep 3, 2013 02:29
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Khablam posted:The connection was bit-perfect nearly all the time. I know this, because wary of the issues I ran MD5 checks on any large download.
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Sep 3, 2013 23:52
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Any effect, that employs any sort of feedback, changes its characteristics depending on sample rate (that goddamned unit delay). If you're running a single lowpass filter on a sound, you probably can do fine with oversampling, but if you have a whole filter chain, things may look different.
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Sep 11, 2013 20:47
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longview posted:I used to get minor headaches from listening to music for too long without a crossfeed filter activated, it's not so much improving the soundstage so much as it's emulating a stereo speaker set in your headphones. IMO it should be implemented in hardware in a "proper" headphone amplifier, it's much more useful than the 6 dB bass boost that most amplifiers come with.
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Sep 14, 2013 01:55
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