When CD’s first came how to instantly get rid of acne scars out in the 80’s – Page 2 – Tapeheads Tape, Audio and Music Forums

The physical sales probably would decline, as the listening habits changed, because the living conditions changed (we are spending a lot of time pendling between home how to instantly get rid of acne scars and work – and people that did this before would probably remember what how to instantly get rid of acne scars anger was to find out pink floyd was left home how to instantly get rid of acne scars by accident and taken michael bolton instead; now one can carry a true phonoteque in hifi sound, or let actively pick up a tune out of online how to instantly get rid of acne scars libraries (= streaming), in this case the true issue is finding the right how to instantly get rid of acne scars music out of too many choices; even the radio, which once was a nice source of music, particularly the nights became today a source of commercials and how to instantly get rid of acne scars truncated songs).

This replacement has nothing to do with the quality of how to instantly get rid of acne scars the CD, it’s either one goes mobile or ts no music. The CD replaced the LP on the 1:1 basis (competed for the same segment). The SACD and DVDA competed with the CD on the how to instantly get rid of acne scars same segment, and both lost, since they brought imperceptible advantages. Imagine the CD would have done the same thing to how to instantly get rid of acne scars the LP. It would have died the CD instead.

A couple of small points. One is that I don’t believe for a minute that anyone forgot to decode how to instantly get rid of acne scars a dolby-A processed two-track before a bounce to digital. Second, let’s not forget that in the rush to get content how to instantly get rid of acne scars out there, many mistakes were made when it came to the source how to instantly get rid of acne scars used to master the CD. Often, a safety master that had been eqd for vinyl was how to instantly get rid of acne scars used as the source. Nobody thought about it, and this truly did sound awful. That got fixed pretty early on as record companies came how to instantly get rid of acne scars to realize the mistake.

The information that I have is that they have CHOSEN how to instantly get rid of acne scars not to go through the decoding process because of cost how to instantly get rid of acne scars reasons. Playing out into analog, doign a real-time only decode process, and then re-encoding is sometimes deemed to be too costly for low how to instantly get rid of acne scars cost releases. I have existance proof of undecoded material, including an entire ABBA collection, ABBA gold (1992 japanese), more ABBA gold (1993 japanese), queen (hollywood records — I’ll have to find the CD for details), hdtracks carpenters (listen to it — notice the compression? It isn’t just normal compression — the hdtracks carpenters is one where I am not 100% sure, but it has lots of the indicators). DolbyA is flat at higher levels (or nearly so.) my position that there is leaked material has nothing to how to instantly get rid of acne scars do with guessing, it has a LOT to do with actual decoding attempts how to instantly get rid of acne scars after hearing the special form of compression and looking at how to instantly get rid of acne scars the noise spectrum (the high level of noise IS a hint, but not determining whether or not.) * it seems like the carpenters downloads requires the 3db boost how to instantly get rid of acne scars before decoding — the highs are cleaner and the dynamics are correct… (one VERY good thing about doing the decoding is that how to instantly get rid of acne scars the spatial image is much better — dolbya encoding will flatten the image, decoding brings back the proper stereo image.)

A dolbya decoder can SOMETIMES do a plausible job of how to instantly get rid of acne scars processing non-encoded material — but usually it is dead and grainy sounding… After a while, you can get used to the characteristic sound of dolbya how to instantly get rid of acne scars (and the sound of an erroneous decode operatoin) — so it is possible to be fairly accurate on the how to instantly get rid of acne scars guess (often with a backup of the determination based upon the how to instantly get rid of acne scars hiss in the spectrum, and the results of a decoding attempt.)

There is another thing that is SOMETIMES done — I have noticed a 3db cut at 3khz with a how to instantly get rid of acne scars Q of 0.707 is sometimes used (these parameters are VERY specific — anything different doesn’t work as well.) so, decoding properly requires a 3db boost at 3khz/Q=0.707. (I would have used Q=0.500, but Q=0.707 does have more of a taming effect.) (if anything, encoded dolbya has an HF boost, but sometimes not very extreme.)

Note that normally — when given fixed tones through the spectrum — at high levels, a dolbya is flat. It is only not-flat at lower levels. This means that compressed ‘rock’ or ‘pop’ is sometimes difficult to distinguish encoded or not (the levels are high enough that the HF compression is how to instantly get rid of acne scars a little less evident.) with classical/orchestral material, the sound of dolbya is a bit more evident. (it is also evident on vocals — some of karen carpenter’s recordings.) the extreme HF compression (speed) is very noticeable on certain material, not noticeable at all on others. (the attack/release time is complex to specify, but generally one can accurately say that teh attack can how to instantly get rid of acne scars be as fast as 1msec for the high frequencies and how to instantly get rid of acne scars release as fast as 40msec for high frequencies — however, it is often slower based upon the dynamics. — the release on HF morphs from approx 40msec single RC how to instantly get rid of acne scars to 30msec in series with 40msec depending on the signal how to instantly get rid of acne scars dwell time.) the two decays in series really help to mitigate IMD. The attack moves from 1msec to 40msec depending on signal how to instantly get rid of acne scars (really really complex.) suffice to say, that the compression is fast and not always extremely audible.

The calibration levels are also fairly consistent — I have material with tones that requires between -12 and -20db for the ‘calibration’ (the required tones are based upon measurement), but the leaked material almost always requires between -12.2 and -12.5dB. Such a high value for the leaked material indicates that how to instantly get rid of acne scars they know that they don’t need much headroom. If they are worried about headroom, then they might use something equivalent to -14 or even -20 in the usual worst case. (the SW decoder works at any calibration level, but sounds bad if there is too much error.)

Ironically, sound quality for the mass consumer pretty much reached a how to instantly get rid of acne scars peak with the CD, and it only went backwards from there. Once MPEG-like compressed audio appeared, it was over. You could say the trend was foreseeable with minidisc and how to instantly get rid of acne scars DCC -the first truly mass-marketed digital devices that allowed the user to record their how to instantly get rid of acne scars own audio used lossy compression. And that was in 1992. Then came MP3 on computers…Let that sink in for a moment.

They say streaming/downloads are replacing CD, but those downloads are -usually- in one compressed format or another, so that’s a huge step back from the "reference" quality of the CD. I mean, c’mon, who’s gonna download justin bieber’s new album in lossless hidef audio quality?

This is the largely unspoken truth about audio today. It really has gone backwards from CD’s heyday. True, there do exist lossless files such as FLAC, but they are really a relatively small minority in a how to instantly get rid of acne scars sea of mostly lossy mp3s etc., not to mention streamed music. The situation has improved though, with much better quality mp3s which, while not as good as CD, are still pretty good, assuming the production is decent, at least for non-classical stuff.

Well — some of the examples are so egregious and the results how to instantly get rid of acne scars so improved that it is almost impossible to honestly contest how to instantly get rid of acne scars the issue… Note that many of my decoding attepts are WITHOUT TONES, so it is a tedious and error prone process to how to instantly get rid of acne scars match the calibration levels. However, most of the recordings are accurate WRT my reference sources how to instantly get rid of acne scars (when I have them.)

Please refer to the 99 red balloons example in my how to instantly get rid of acne scars demo repository. (undecoded from CD, undecoded with removal of the miscreant CD pre-emphasis, and decoding of the properly de-emphasized copy.) BIG improvement in stereo image. The only problem is the distorted vocal sibilance — but very common from that time frame.

Also you can clearly clearly compare the vinyl copies vs. Polar music vs. My decoder for proof. (it is kind of hard to tell due to the how to instantly get rid of acne scars standard compression on the normally released material.) that result of the ABBA comparisons is a bit noisy how to instantly get rid of acne scars due to the vinyl mastering error on ring ring, and the HF transient blunting issue, and the grain associated with actual dolbya decoding. But — assuming that you can see through the differences (improvements in transient beahvior) of the DHNRDS decoder vs. DolbyA, the fact that material is dolbya encoded is clear as how to instantly get rid of acne scars day. The fully decoded copy of 99 red ballons shows a how to instantly get rid of acne scars lot.

Sometimes you have to trust hearing — but another thing is the tell-tale increase in hiss above about 10-12k on a spectogram. It isn’t always dolbya, but it often is. (it would be a really badly eqed tape deck if how to instantly get rid of acne scars it is tape and not the dolbya 5db enhancement above how to instantly get rid of acne scars about 10khz (the curve actually starts at about 5khz, but only becomes proiminent above about 10-12khz.) nominally, it is claimed to have a 9k-20+khz band, but it realy starts much lower with a Q of how to instantly get rid of acne scars approx 0.450.

In the demo repo — if you find a mistake — it is only a mistake, but most of the demos are pretty good and do how to instantly get rid of acne scars CLEARLY show decoding (many times with reference — again, a lot of consumer material has been compressed — the decoded copies with DHNRDS has NOT been mastered.)

On the DHNRDS copies – it has ZERO smearing, but a dolbya has smearing, excess sideband (distortion) generation, etc. So, a DHNRDS will sound cleaner and more distinct. Most of the difference is blunting of intense details by how to instantly get rid of acne scars the dolbya HW — which causes a higher level compression effect. The lower level and grainy details then become more exposed how to instantly get rid of acne scars on the HW design. The DHNRDS has no such blunting, shapes the attack/release to minimize the width of the sideband creation, and does a trick to avoid sideband creation when it how to instantly get rid of acne scars is bad for the signal. Basically, the DHNRDS has so much less grainy and detail smearing how to instantly get rid of acne scars distortion that other defects become more apparent.

One more PS — after I just did a test listen to the demos: 1) the dropbox mp3 decoder isn’t very good — phasing sound. 2) if interested, I can supply full quality flac version — incredibly good, but cannot play online in dropbox. (the flac versions REALLY show the limitations of mp3 — some of the recordings are amazing — some of the brasil’66 stuff is eye opening.) the 99 red ballons is the most obvious though.

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