Sound quality degrades on preview

Has anyone every heard of this problem where the sound is
crystal clear within the slide, but the preview is of a lower
quality, almost like a slight amount of static, just a little
rougher. I've never run into this before and I've done some pretty
big projects with audio. Any guesses what it might be? All the
settings are on high quality.
Thanks!

In case someone runs into this in the future, I solved the
issue, which is still a little confusing. The sound was recorded at
a lower quality, but still sounded great when played back within a
slide. But when I previewed it, the quality deteriorated, even when
I moved the settings up to highest quality.
Once I rerecorded the audio at the highest setting, it
sounded great in both the slide and the preview.

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'Maximum' Quality Setting for Previews

Dear Adobe,
Aside from 'Low', 'Medium', and 'High' settings for standard-size previews, please add a 'Maximum' quality setting (equivalent to 10-12 quality setting for JPEGs in Photoshop).
As standard previews are generated for imported images or for new edits on images already in Lightroom, sometimes low quality JPEG previews are generated. These previews exhibit color banding & macroblocking artifacts typical of JPEG files (especially in dark areas). Since these previews are used in the Library, Slideshow, Print, and Web modules, it's pretty darn annoying & distracting to stare at low-quality renditions of our images. Switch to Develop module, and a fresh new image is rendered on screen; therefore, these JPEG preview artifacts are not visible in the 'Develop' module.
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2.) Fix it the Aperture, Bridge, iPhoto, 'every-other-software', and your own 'Develop' module way: display the precached preview first, while rending a fresh view of the image in the background... display that when it's ready.
Here's a forum where I've discussed this previously:
http://www.adobeforums.com/cgi-bin/webx?128@@.3bc33a73
Here are examples of the low-quality previews generated by Lightroom (when 1680 'High' setting is used for previews):
http://web.mac.com/rishisanyal/iWeb/Homepage/Macroblocking.jpg
http://web.mac.com/rishisanyal/iWeb/Homepage/Library.jpg
http://web.mac.com/rishisanyal/iWeb/Homepage/Library_vs_Develop.jpg
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http://web.mac.com/rishisanyal/iWeb/Homepage/Lightroom_JPEGblocking.jpg
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Sounds pretty unacceptable to me.

So, I'm pretty much convinced now that the problem with low-quality LR previews seems to be mostly isolated to the previews that LR generates after you make edits in the 'Develop' module.
Upon first import, this image looked fine in the 'Library' & 'Slideshow' modules. After making some edits (color, tone, etc.) in the 'Develop' module, I ended up getting this hideous preview in the 'Library' & 'Slideshow' modules:
http://web.mac.com/rishisanyal/Lightroom/07-0310_BandingBlocking.jpg
You people with LCDs will be able to see the JPEG artifacts better than those with CRTs, since LCDs tend to be sharper.
So, the obvious question is this:
Does LR, when *re-generating* previews for edited images, ignore the quality-setting for JPEG previews (which I have set to 'high')??

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Since I bought iPhone4 and listened my songs with "Ipod app" and external speakears I was amazed how brilliant, sharp, intense, clear, perfect bass, perfect trebble the sound was, there was no distortions or saturations ever... The sound quality was just PERFECT with the equalization OFF!!! Not remember if I had SoundCheck ON before but now it doesn't make any difference. I installed iOS 5 over 4.3.1 or so and now sound is just more like noise compared to iOS 4, I have selected all presets or equalizations but ALL are poor, maybe some presets work better with some songs but still they are poor.... Songs did not have clarity!! The volume force was like degraded, now I have to set higher volume to produce same force than before with less volume... iOS 5 max volume (100%) is like iOS 4.2.1 85-90% of volume. Difference is that iOS 5 maximum volume starts slightly to distort or saturate audio quality... before with iOS 4 sound quality was Crystal Clear even with max volume!!! In short SOUND QUALITY is DEGRADED... or perhaps I'm a very critical and nonconformist guy in terms of audio quality... this kind of degradation is quite notorious when one loves music!! or is there some other configuration I'm missing here??
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At first I thought it was a problem with my phone... I used to believe iOS 5 was engineered for new iPhone 4S hardware and since it is shipped with dual-core processor, I thought my phone was short in resources!!!
Why max volume is lower in intensity???
Why equalization with the EQ Off changed?? All my songs were stored on iTunes, they must have same sound quality properties as they were when first ripped..
I hope Apple enginneers did not sacrifice volume output force in favor of saving some battery, because normally we charge battery when listening music at home with our personal speakers equipment.
I would like to understand the reasons why the new "Music App" was "changed", and why these changes have to go backwards!! That is sad... because for iPhone or iPod lovers music was always important.
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I have I believe a G2 iPod (15 GB), and I play it in my car using a cassette adapter. I've found that to keep the sound from degrading at above average volumes, I have to make some adjustments. One, I have to set the EQ to 'Bass Reducer'. Two, I have to make sure the volume on the iPod is at about 80%. If I go above that, the sound distorts. The lower you go below that, the more hissing you get w/ the playback. I also turn the 'Sound Check' setting on.
Any other recommendations on how to optimize the sound quality when playing it through your vehicle sound system? Also, I'm thinking about getting a G5 unit (most likely the 4 GB Nano). Anyone have any feedback on whether I can expect better sound quality, in particular in my vehicle with the setup outlined above, by upgrading to the newer unit?

Various Methods to Connect to a Car Stereo System, or Listen to Your iPod in the Vehicle
Best:
Direct connection via the dock connector or headphone jack of your iPod, to the mini-jack input (or AUX RCA input jacks) of your car stereo. Not many low/moderate-end cars have this feature yet, but it is becoming more popular. Some aftermarket auto stereo units may have this feature.
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http://logjamelectronics.com/ipodproducts.html
http://www.myradiostore.us/auxadapters/blitzsafe/blitzsafe-m-link-ipod-interface .html
http://www.theistore.com/ipod2car.html
http://www.mp3yourcar.com/
Better:
Connect your iPod to a cassette adaptor and play your tunes through your car's cassette player. Some new cars no longer come with a cassette player, so it may not be an option. It will provide even better audio quality if you can run the audio feed out of the dock connector (see the SendStation link below). Can be portable between cars that have a cassette player and also be used in your home cassette system. $5 to $20 for the adaptors, with large variations in quality (even with the same model).
Good:
Attach an FM transmitter to your iPod and play the tunes through an unused FM station. Convenient, but wireless FM transmitter signals are susceptible to static and outside interference, and can vary in strength and quality depending on your location. Some noticeable degradation and distortion, depending on the quality of the transmitter, the sensitivity of your ears and the airwave congestion in your area. Highly portable between cars, and may be used in a home system. FM transmitters that need to be plugged into a DC auto jack may not work in a home environment (without some sort of adaptor). You can pay from $15 to more than $80 for some of these.....but for FM quality audio, how much is too much?
Marginal:
Attach an external speaker system to the iPod and play it in the car. Workable, but not too good - unless you spring for a $300+ Bose (or similar) system. But why? Only if your vehicle has no Stereo system, perhaps.
Brave Techno-Geek:
This site gives some directions on adapting a car stereo by yourself. Risky, but it has been successfully accomplished by a forum member. Fairly inexpensive....unless you screw it up.
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I purchased a X-FI Xtreme music the other day, poped her in, and she sounded beautiful. That is until a couple days ago, when some songs I play having static sound (games run alot better now, because I was running a SB Li've! 24 BIt, it used alot of CPU). The main reason I love this card so much is because of the lightened load on my CPU, and because games sound so much better now. Problem is some of my music sounds like it has static fuzz in it, where other songs sound perfectly normal. Im wondering if it is my sound card, my speakers (I have TomMade 2. speakers, have had em for about 8 months, so they are getting old, cost me about 80 bucks Canadian when I got them) or the song file itself (because some songs sound normal, or perhaps the instruments are just so loud I cant hear the static). I dont know if it might be my speakers because they are old. And as for wonderng if its the sound file itself, the one song I hear it big time on is a quiet song at the start, but with some instrumental, and I hear static big time. Other songs are louder, and I dont know if i can hear the static or not. Coming from my SB LIve! 24 Bit, games sound better on my X-Fi, but I have to say that songs probably sound better on my SB Li've!. I didnt really notice alot of static on my old card, but maybe I just wasnt paying attention. Is there anyway I can be sure of what the problem is?
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96khz output is in thx console on the tab speaker selection and the heading "digital output sampling frequency" if you don't have then somethings gone wrong somewhere.
I can assure you though having 96 khz output will not make any difference to your sound its more likely that you have the other problem or static sound as you put it, that has not been fixed yet, this is what is likely to be degrading your sound not the digital output bit-rate. In fact in some cases setting it higher results in more static.
The static you get sounds like you have the the classic pops and crackles with the creative range of sound cards this has been going on for years, try reading the link I posted in my other post there are litterly thousands in the same boat as yourself.

Sound quality has worsened (might be El Capitan)

I listen to Spotify a lot via headphones at work, and I noticed lately that the sound quality is pretty bad (again). Volume normalization is turned off. The sound is thin and not very dynamic. A fair bit of distortion as well. I'm running El Capitan public beta, so that might be it, but Itunes sound a lot better. Lots more bass and stereo definition.

In case someone runs into this in the future, I solved the
issue, which is still a little confusing. The sound was recorded at
a lower quality, but still sounded great when played back within a
slide. But when I previewed it, the quality deteriorated, even when
I moved the settings up to highest quality.
Once I rerecorded the audio at the highest setting, it
sounded great in both the slide and the preview.

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I have noticed for a long time that recordings sound much better outside of iTunes. Better even in the Finder when using the Preview in an Info or Regular Window.
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7th Gen 160 sound quality?

I am considering one of these, as my collection has outgrown my 80gb iPod, but....
I have read some negative commentary on the degradation of sound compared to the older versions. (not here: i tried searching "classic sound quality" and did not find much.)
While having the ability to carry my whole collection would be nice, I am a bit gun-shy about spending the money and finding out the quality of the sound is worse. I use 192vbr AAA or 256 MP3 encoding, so for compressed sound, I am getting close to the best without making tracks too large.
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Message was edited by: MichKor

just got back from the Genius bar and I feel silly!! I did not have the earbuds pushed in all the way!! The guy showed me how it was kind of loose. I was not forceful enough. problem solved!

I RECENTLY BOUGHT SOME SONGS FROM ITUNES BUT THE SOUND QUALITY WAS REALLY BAD. I'M NOT SURE WHAT TO DO?

i bought some songs yesterday that i really liked but when i was listening the sound quality was really bad. it just ruined the song almost. i am not sure what to do about it.

You might try listening to the songs from other devices or systems to make sure it doesn't have to do with your computer specifically.
Also try to preview the songs from your computer and any other devices if possible to see if the preview sounds any different.
If you're still having issues you should contact iTunes support:
http://www.apple.com/support/itunes/
Once you get there, choose Music Purchases from the list, then choose Music Purchases again, and it will let you Email them directly about the issue.
Give them the names of the songs you bought and as detailed a description of the audio issue as possible.

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