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aechmea

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aechmea last won the day on January 22 2014

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    Hunter Valley

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  1. One must understand that WAV FLAC AIFF ALAC and hundreds of other file types are not the music. The music format is PCM (or LPCM to be correct) (or in rare cases DSD) and is contained in the file-type wrapper much as clothes are stored in a suitcase. Even Red Book CD is a wrapper structure. Doesn't matter what the suitcase looks and feels like the clothes are still the same clothes. [Yes I know that analogies are never perfect.] [Yes, I know that some DACs will accept DSD but even that is in a container file-type.] "Player" hardware/firmware/software unpacks the PCM from its suitcase and presents it to the DAC hardware/software. The PCM will be identical no matter what suitcase it came from unless the "extractor" is faulty. If it sounds different then the DAC and its analogue electronics is to blame. RE compression. When was the last time that you unzipped a document and found that the unzipping gave you something other than the original? Never. FLAC holds metadata better than most file-types, but it is also a pain in the ... to keep it correct and consistent because it all depends upon where the metadata comes from and who did it; its just done by people, so were they consistent in their data entry? A simple example ... Mozart W. A. Mozart Mozart, Wolfgang W A Mozart Mozart, W. See what I mean. Spelling mistakes are also rife. I don't worry much about metadata; I just have a carefully constructed set of folders with consistent file naming. Does me. Just do FLAC; its pretty universal these days and with, say, standard compression it is small enough. You can always convert it to WAV or whatever at any stage. Permanent WAV is too big for me since I already have 2TB x 3 copies of FLAC. If you are using the same device to feed the DAC then I find it hard to believe that you will hear any difference.
  2. Excellent, thank you, very well worth considering. The MBP is slow to start-up and the disk is getting a bit long in the tooth so this may be an upgrade path. With a new SSD and with its now new OS it would be fast enough for all that I would want to do with it.
  3. Yeah, people like me that live in a large regional town but still get nothing. NBN only offers us satellite. New houses along our back fence all get fibre. Our neighbours on northern side (further away from exchange) and houses further on get fixed wireless. NBNCo quoted us $25K to connect us with fibre - yeah right. But up until recently we were considered "urban/metropolitan" by ACMA so no Starlink either. Now Starlink is available Aus-wide (I think) it may be an option after the beta testing period. [Using the Optus 4G network with a data modem at the moment (with half bar reception!)]
  4. A postscript to my post re installing High Sierra. Warning. Don't rely upon getting anything from a TimeMachine backup. After the install, I restarted TimeMachine, but it failed miserably complaining about encryption. Its not like me to use encryption in other than a couple of specific cases, but I must have when I started the TimeMachine backups years ago. Fortunately I have straightforward file copies on other disks. The TimeMachine incremental backups are nice but not if they are not accessible to normal techniques. Maybe I did something wrong but it seems that different versions of TimeMachine aren't all that compatible.
  5. Hi, That Mac I bought at the time for my father so that he and mum could give away the paper version of bookkeeping, share trading etc. It has an early version of basic MYOB (2004) which still works perfectly for general ledger type applications. I use it being Treasurer for a garden club. It has Office 8, which does all of the things that I would want of Excel and Word. The Adobe CS4? suite still works but was never really used. It will do web based email (eg. Gmail). "Mail" has trouble with the rubbish that some mail servers throw at it. It is still just OK for most web sites, but quite a few now don't render properly (new Javascript code/construction?) and some have certificate problems. As it turns out my bank's web site and my share trading site still work properly, but that won't last I guess. I have an old web site generator that still works. I built a web site for my sporting club a few years ago. It will play my early version of Audirvana. It will play my favourite game Age of Empires II (PPC code) Its now the only computer in our house that will still run our ancient scanner (PPC driver) In general, the hardware is still sound but limited and various software packages are missing latest features (which one might call bloatware). I have used/had Macs going back to the SE30 (upon which we built (at work) a mail server!); they have all suffered the same fate ie hardware and software capability gets left behind. They can still do useful things but only if you can find the old software versions. I am keeping the MBP 2,2 and the iMac 1,7 at 10.6.8 in case I ever need to find something in my MYOB databases (now replaced with linked Excel spreadsheets)
  6. Nearly 12 months ago I decided to upgrade my house full of old Macs to a more recent OS that will run new stuff and render web pages properly and ... Life got in the way but over the weekend I did them and thought that I would relate my experiences. I have ... MBP 2,2 (2006) iMac 7,1 (2007?) iMac 10,1 (2009) MBP 8,1 (2010) iMac 13,2 (2012) all running 10.6.8 except 13,2 which was 10.8.something and decided to install High Sierra. The upgrade app has been removed from the Apple App Store. The first 2 models are "unsupported". Used the Install and "tool" mentioned on p2 of this thread to generate an install for the 2 early Macs. Unfortunately I couldn't get either to boot from the patched installer on USB stick, so turned to the "supported" Macs. Didn't try much detective work since happy enough for them to stay 10.6.8. Made a USB stick with the Apple commands - OK Booted the MBP 8,1 from it - OK Ran installer, crossed fingers - OK but slow with plenty of long pauses which seemed like freezes but weren't. Got there eventually, first time. I did an upgrade in place rather than doing a re-format. Happily all the old stuff was retained without any problems. Of course the Power PC coded apps didn't work but I new that. Moved on to iMac 10,1. Same process but had terrible trouble. Installed Ok but carked on one of the security upgrades installed later. To cut a long story short, tried all sorts of in-place installs, format-install, recovery mode, recovered from backup etc etc. Eventually discovered that the disk had bad sectors and read errors which the installer said nothing about. Found out myself using "First Aid". S.m.a.r.t indication on "disk utility" did not display errors - ?. Installed onto an external USB disk - OK. Because it was a reformat had to install all the other apps again. The faulty disk is now reformatted with a name of "faulty". An app I later tried which reads the SMART data, said that the disk had spun for 49,000 hours - not bad I suppose! And had 47 bad sectors. Finally did an in-place upgrade on the iMac 13,1. Having done the others, I knew what to expect. Thought it may have been faster the Mac being newer and bigger and already had a recovery partition, but no such luck. Worked first time, though. The process works well but slowly, but be careful of hardware, particularly disk errors. Able to upgrade a lot of the apps that were constrained by 10.6.8. They all run surprisingly fast, once up and running. Now using 3 like-new Macs. Yippee.
  7. ☺️ HaHa - funny you should mention that. I have burnt all my half dozen or so downloads to disk.
  8. Depends on the model. The Oppo models are "universal" transports. Mine isn't an Oppo mechanism; its just a computer DVD drive that can be replaced by anyone that can pop the lid. The real functionality is provided by the firmware living in an FPGA. If there is an error, it rereads and rereads and .... to recover the data, rather than dropping bits. Might work; who knows; sounds plausible. This design concept suggests to me that MSB don't really think that the physical drive is important, just their software. PS-Audio has a similar box.
  9. Hasn't taken me too much thought or calculation CD = 100% All are ripped to hard disk (with multiple copies for backup security) but never played that way.
  10. Correct - digital attenuation - but only 5-10dB = roughly 2 bits = inaudible
  11. In the latest software, the "output" function is set automatically. From the latest manual ... I therefore suspect that it doesn't matter any more if you have a 4 or 5 or Mate or ....
  12. Hi S, I run digital (PCM) from the sources (all digital, so no ADC employed) into the DEQX. There, it is manipulated with speaker correction, room EQ filters, volume, and timing (not multi-amped), left in the digital domain, and output to the PS-Audio DAC (still PCM). I let the PS-A do its thing (converting all its input to DSD) and then outputting its analogue (really a low-pass filter) direct to the power amp. Whilst the signal is in the DEQX I split-off the low freqs to the subs as analogue. So in my case, the DEQX, for the main body of the music, is a digital device - but is still the command centre for all that is going on. The PS-A DAC is playing dumb and does nothing other than be a DAC at the last possible moment in the chain. Do I need a PS-A at all? Probably not. I bought it out of curiosity rather than need. I keep everything that I buy, so it's still part of the system.
  13. I run very very little attenuation at all. The DEQ master volume is somewhere between -10dBFS and -5dBFS (the white light). The PS-A DAC (situated after the DEQX) is set to 100%. Attenuation is provided by the various hardware designs ... The main speakers are grossly insensitive (83dB at best and more likely 80ishdB) The power amp has a high input sensitivity (2.2V) The PS-A DAC (used to feed the power amp) has a max output of only 1.2V Geriatric ears complete the picture
  14. Hi David, I have a pair of DD15. I use measuring software (DEQX) to see what the freq response looks like at "my seat". Of course the Velodyne subs have their own measuring software and microphone and DSP/EQ, so you can probably get on top of things with that. When you are ready, I suggest that you make a new thread in the appropriate forum and there will be plenty of people that can help. Its messy and time consuming but worthwhile in the long term. I ended up with the subs nowhere near any recommended position, so it will take some trial and error.
  15. Hi Cam; pleased to have you on-board. Plenty to get involved with. The classifieds will become available after you have contributed a few times.
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