Re: [SlimDevices: Audiophiles] Changing your linear pwr supply for the Duet
atkinsonrr;278161 Wrote: > I believe when I checked, the voltage coming off the transformer is 9 > volts. The transformer's output is AC, measure the DC voltage after the diode bridge. -- CPC CPC's Profile: http://forums.slimdevices.com/member.php?userid=12336 View this thread: http://forums.slimdevices.com/showthread.php?t=44521 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
opaqueice wrote: >> And while I completely agree that in this day and age of cheap storage >> there is no reason to use a lossy codec, it would still be nice to know >> which lossy codec to use in the event that one has a need for it (think >> iPod). > > But the issue is fast become irrelevant in any case - the latest > HD-based ipods have 160GB of memory, and the flash-based ones are > getting up there fast. I suppose the next debate will be over the > necessity of hi-res formats. The question was moderately interesting when folks used "56KB" modems to download stuff. But its really moot now. In any environment that you will do serious listening to the music, you don't need to compress the hell out of it. So don't. If you are riding a New York subway, or in any car short of a Rolls Royce or big Mercedes, it doesn't matter. Store your files long term in something like FLAC, transcode them to suit your PMP to something like 386KB VBR, and be done. Further optimization is silly. All IMHO, but this is audiophiles ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
RGibran;277928 Wrote: > > Thanks for the chuckles. > Glad to oblige. ralphpnj;277930 Wrote: > As for the lack of comparison testing I can only guess that since JA > and Stereophile take the position that files made with lossy > compression are do not offer true high end sound quality, then why > bother to run all those tests. But then why bother with the graphs, or the article at all, for that matter? > And while I completely agree that in this day and age of cheap storage > there is no reason to use a lossy codec, it would still be nice to know > which lossy codec to use in the event that one has a need for it (think > iPod). Yeah, it would be nice. And this is one case where subjective assessments are all you need. No one doubts that 128 kbps MP3 is easily distinguishable from redbook, so the question becomes which codec and settings are the least objectionable. But the issue is fast become irrelevant in any case - the latest HD-based ipods have 160GB of memory, and the flash-based ones are getting up there fast. I suppose the next debate will be over the necessity of hi-res formats. -- opaqueice opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Changing your linear pwr supply for the Duet
I believe when I checked, the voltage coming off the transformer is 9 volts. -- atkinsonrr Transporter, Quicksilver V4 Monos, Vandersteen Model 5A speakers. SB3, Quad Tube Pre-Amp, Tube Monos, Quad ESLs. Homemade Tripath Digital amps, Carver ALS (original) Speakers with Outboard Crossovers. atkinsonrr's Profile: http://forums.slimdevices.com/member.php?userid=7214 View this thread: http://forums.slimdevices.com/showthread.php?t=44521 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Who uses green marker pens on their CDs?
radish;278106 Wrote: > Who uses CDs anymore? This is what you need these days: > > http://www.newegg.com/Product/Product.aspx?Item=N82E16811144011 LOL review says > Cons: color is slightly off what the picture shows That's a -con-?!? -- adamslim Those are my principles, and if you don't like them... well, I have others SB+, EAR V20, Living Voice OBX-R2s plus some other stuff SB3, Charlize, Harbeth HL-P3ES adamslim's Profile: http://forums.slimdevices.com/member.php?userid=7355 View this thread: http://forums.slimdevices.com/showthread.php?t=44567 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Who uses green marker pens on their CDs?
Who uses CDs anymore? This is what you need these days: http://www.newegg.com/Product/Product.aspx?Item=N82E16811144011 :) -- radish radish's Profile: http://forums.slimdevices.com/member.php?userid=77 View this thread: http://forums.slimdevices.com/showthread.php?t=44567 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Changing your linear pwr supply for the Duet
atkinsonrr;277716 Wrote: > I bought two of the (semi-famed) Power One HB5-3 power supplies. I use > one for my Squeezebox 3 and was planning to use one for the Duet I had > on order. > > OOOPPS!! > > The Duet needs 9 volt in, not 5. Hmmm... Anybody know how to change > the HB5-3 to 9 volt? Just a matter of a resistor or two I am guessing, > but anybody know which ones? > > I found the datasheet for the LM723N used in the Power One here: > http://www.chipcatalog.com/ST/LM723N.htm > > The datasheet shows schematics for applications, and I'm guessing the > schematic that applies to the HB5-3 is either schematic #16 or #17, but > that's as far as my limited electronic neurons take me... Unless the DC voltage going into the regulator is higher than 9vdc, changing the resistors won't give you 9 vdc. -- CPC CPC's Profile: http://forums.slimdevices.com/member.php?userid=12336 View this thread: http://forums.slimdevices.com/showthread.php?t=44521 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Who uses green marker pens on their CDs?
If you do, this may be of interest: http://forums.slimdevices.com/showthread.php?t=44533 -- morris_minor morris_minor's Profile: http://forums.slimdevices.com/member.php?userid=13950 View this thread: http://forums.slimdevices.com/showthread.php?t=44567 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
Actually that particular Stereophile article is a direct result of a recent thread on the Stereophile forum. (http://forum.stereophile.com/forum/showflat.php?Cat=0&Number=35494&page=0&fpart=all&vc=1) Note: I'm "jazzfan" on the Stereophile forum) If you take the time to read/scan through the thread you'll see that JA takes all these things very seriously and does respond to forum posts. As for the lack of comparison testing I can only guess that since JA and Stereophile take the position that files made with lossy compression are do not offer true high end sound quality, then why bother to run all those tests. And while I completely agree that in this day and age of cheap storage there is no reason to use a lossy codec, it would still be nice to know which lossy codec to use in the event that one has a need for it (think iPod). -- ralphpnj Lock, Stock and Two Smoking Barrels -> Snatch -> The Transporter -> Transporter 2 ralphpnj's Profile: http://forums.slimdevices.com/member.php?userid=10827 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
opaqueice;277809 Wrote: > Then there are posturings like this: Quote: Originally Posted by John Atkinson Given the bigger bit budget at 320kbps, the AAC codec produces a result that may well be indistinguishable from CD for some listeners some of the time with some music. opaqueice;277809 Wrote: i]That[/i] would have been interesting, because what most people really want to know is which format to use and at what level of compression. This kind of vague cursory analysis and unsubstantiated statements isn't useful. Geez, isn't that what he said? opaqueice;277809 Wrote: Frankly, I very much doubt he would have been able to hear the differences between 320 MP3 or AAC and CD (at least not without lots of practice and choosing the test track very carefully), and after all the whining Stereophile has been doing recently that wouldn't look very good. Who's posturing now? opaqueice;277809 Wrote: I too use FLAC, and for the same reasons haven't paid that much attention to lossy formats. "HOWEVER MY IMPRESSION" is that the MP3 codec has improved considerably in recent years. One obvious thing is to use VBR (variable bit rate) rather than CBR. "AFAIK" VBR is always superior, and yet most MP3s don't use it. As for 320, "MY UNDERSTANDING" is that "IF" you know the weak points of the particular MP3 encoder you're using you can find of construct a track that will reveal them pretty easily. I've never seen a positive ABX result for 320 MP3, but I wouldn't be surprised "IF" they exist. Actually I'd say "A GOOD BET" is a strongly asymmetric test tone. You can hear absolute polarity inversion with that pretty easily, and "I THINK" all these lossy algorithms completely destroy phase coherency, so that "SHOULD" manifest itself as a subtle change in the pitch of asymmetric tones. "NEVER TRIED IT THOUGH". Thanks for the chuckles. RG -- RGibran Transporter > PS Audio GCC-100 > Martin Logan Aeon I RGibran's Profile: http://forums.slimdevices.com/member.php?userid=10220 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
Nikhil;277815 Wrote: > > That's something I have been wanting to ask for a while. Just to be on > the safe side (future proof and archival value), and since storage is > becoming cheaper by the day, I have been using FLAC for quite a few > years now. I can certainly spot the limitations of 128 kbps mp3s and > very early in this game, I was very unhappy even with 256kbps encoded > mp3s. But in the several years since I bothered to test, the encoding > has obviously got a lot better. Are there any particular tracks that > can showcase the limitations of todays best mp3 encodings (ie, 320 kbps > or high VBR mp3s?) I too use FLAC, and for the same reasons haven't paid that much attention to lossy formats. However my impression is that the MP3 codec has improved considerably in recent years. One obvious thing is to use VBR (variable bit rate) rather than CBR. AFAIK VBR is always superior, and yet most MP3s don't use it. As for 320, my understanding is that if you know the weak points of the particular MP3 encoder you're using you can find of construct a track that will reveal them pretty easily. I've never seen a positive ABX result for 320 MP3, but I wouldn't be surprised if they exist. Actually if I had to guess I'd say the best bet is a strongly asymmetric test tone. You can hear absolute polarity inversion with that pretty easily, and I think all these lossy algorithms completely destroy phase coherency, so that should manifest itself as a subtle change in the pitch of asymmetric tones. Never tried it though. The best place I know of to ask questions like that is the hydrogenaudio forums - I think some of the designers of these codecs hang out there. -- opaqueice opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
opaqueice;277809 Wrote: > So he's claiming that by looking at a graph of this particular test-tone > he can tell whether or not these effects are audible on music. And yet > he didn't bother to do a listening test - in the time it took him to > prepare that article, he could have performed a whole series. -That- > would have been interesting, because what most people really want to > know is which format to use and at what level of compression. This > kind of vague cursory analysis and unsubstantiated statements isn't > useful. > > Frankly, I very much doubt he would have been able to hear the > differences between 320 MP3 or AAC and CD (at least not without lots of > practice and choosing the test track very carefully), and after all the > whining Stereophile has been doing recently that wouldn't look very > good. Yes, a typical JA article. This is the man who won't listen to a SET amp as he considers it a tone control, IIRC. It would be so easy for them to do a detailed blind test using a high resolution system; they could even highlight any changes in the results generated by the listeners getting familiar with the MP3/AAC artefacts. That would have been interesting! The vague 'ooh look at those charts' tone of the article is at best pointless, at worst misleading. Moral: don't expect investigative reporting in the hifi press! -- adamslim Those are my principles, and if you don't like them... well, I have others SB+, EAR V20, Living Voice OBX-R2s plus some other stuff SB3, Charlize, Harbeth HL-P3ES adamslim's Profile: http://forums.slimdevices.com/member.php?userid=7355 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
opaqueice;277809 Wrote: > While the graphs are kind of interesting, they'd be much more so if he'd > actually explain a bit more about -why- they look like that. It's not > like it's a mystery. > Indeed > > Frankly, I very much doubt he would have been able to hear the > differences between 320 MP3 or AAC and CD (at least not without lots of > practice and choosing the test track very carefully), That's something I have been wanting to ask for a while. Just to be on the safe side (future proof and archival value), and since storage is becoming cheaper by the day, I have been using FLAC for quite a few years now. I can certainly spot the limitations of 128 kbps mp3s and very early in this game, I was very unhappy even with 256kbps encoded mp3s. But in the several years since I bothered to test, the encoding has obviously got a lot better. Are there any particular tracks that can showcase the limitations of todays best mp3 encodings (ie, 320 kbps or high VBR mp3s?) -- Nikhil Nikhil's Profile: http://forums.slimdevices.com/member.php?userid=993 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
Nikhil;277800 Wrote: > Article from Stereophile about the age old argument, with lots of graphs > included. > > http://www.stereophile.com/features/308mp3cd/ While the graphs are kind of interesting, they'd be much more so if he'd actually explain a bit more about -why- they look like that. It's not like it's a mystery. Then there are posturings like this: John Atkinson Wrote: > Given the bigger bit budget at 320kbps, the AAC codec produces a result > that may well be indistinguishable from CD for some listeners some of > the time with some music. So he's claiming that by looking at a graph of this particular test-tone he can tell whether or not these effects are audible on music. And yet he didn't bother to do a listening test - in the time it took him to prepare that article, he could have performed a whole series. -That- would have been interesting, because what most people really want to know is which format to use and at what level of compression. This kind of vague cursory analysis and unsubstantiated statements isn't useful. Frankly, I very much doubt he would have been able to hear the differences between 320 MP3 or AAC and CD (at least not without lots of practice and choosing the test track very carefully), and after all the whining Stereophile has been doing recently that wouldn't look very good. -- opaqueice opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Audiophile Deathmatch: Monster Cables vs. A Coat Hanger!
Jitterbug;277655 Wrote: > While this is true literally, to say that there was no implication that > both skills were in some way deficient is disengenuous. > > Moreover, it was a missed opportunity. I found your argument in this > thread reasoned and clearly unsettling for those with different > opinions. Your restraint in the face of irrationality and insult, to > that point in the thread, gave you an authority. Resorting to the same > pettiness and covering it with sophistry throws that away. You're right. It's not easy to remain completely untouched by such hysteria. > Generally, I enjoy your posts for the uncluttered thinking so thank you > for those. Thanks. -- opaqueice opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=44124 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Stereophile Article: MP3 vs AAC vs FLAC vs CD
Article from Stereophile about the age old argument, with lots of graphs included. http://www.stereophile.com/features/308mp3cd/ -- Nikhil Nikhil's Profile: http://forums.slimdevices.com/member.php?userid=993 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] New Transporter owner...
Robin Bowes;277613 Wrote: > Kris wrote: > > > > As a single unit, imo the Transporter does NOT cut it for > audiophiles. > > > > Just to put that into perspective, in *lots* of people's opinion: it > does. > > You're not wrong - it's your opinion, but many others are very happy > with the Transporter (myself included). > > Good luck finding something you like. > > R. Yes, for many, the stock Transporter is 'good enough'. For others, it represents a good value because modifiers exist who can make the sound more to their liking. I would not have considered a purchase otherwise at the stock unit price point. Neither group of owners should feel compelled to deride or attempt to marginilize the other group. -- DotSystem DotSystem's Profile: http://forums.slimdevices.com/member.php?userid=15213 View this thread: http://forums.slimdevices.com/showthread.php?t=44360 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
