|High-Resolution Computer Audio: You Can Do It!
Dr. David W. Robinson
Editor-in-Chief, Positive Feedback Online
The New Wave: Computer-Based Music
There’s no doubt about it now: computer-based audio is here to stay. Its combination of compactness, portability, ease of handling and organization, lack of media wear, and remarkable resolution have made it a growing option for people all over the world. More than that, it is growing in popularity and in the quality of the music that it can provide to audiophiles and music lovers.
The advent of Apple’s iTunes system brought a new model of music distribution into being; now high-end alternatives like Super Hi-Rez demonstrate the power of computer-based audio at the highest levels of quality. You can now easily download music files of extraordinary excellence to your computer or music server, and have audio at a level that could only be dreamed about just a few years ago. It’s all possible now!
Complete audio solutions for Windows-based PCs, the Apple Mac, and Linux-based computing now exist. In this discussion, we’re going to concentrate on Windows and Apple computers, since this is what most audio users will be using. The idea is to help those audiophiles and music lovers who may not be very comfortable with computers and related technology. We’re going to give you as simple a sheet for getting up to speed as possible.
Remember: you can do this! In fact, if you think about it, setting up a turntable, and mounting and adjusting a cartridge correctly are extremely complex tasks. In some ways, putting together a computer-based audio system is easier than that, we’re glad to say!
We’ll help you to get there…and you are going to love the results!
"So…how do I do it?"
If you’re new to this, there are several things that you’re going to need to have to make computer-based audio work:
- A computer of sufficient capability to handle the task
- A Digital-to-Analog Converter (DAC) that is capable of high-resolution operation in DSD and PCM and which has USB 2.0 connectivity
- Playback software on your computer
- A high-speed Internet connection (for the purchase and download of your high-resolution music files)
Naturally, you’ll also need to have some sort of music system or headphones on hand to play the music being produced.
Let’s take each one of these in turn.
You can spend a lot of time and money on a computer-based playback system, but it isn’t necessary to do so. Given the power and capabilities of many recent computer designs, you can get the job done with much of what’s out there already. The great thing about computers these days is that you can purchase a lot of horsepower and capacity for quite reasonable sums of money…and you may well have what it takes already!
Regardless of what type of computer you choose, one factor right up front is whether or not you intend to use this computer solely for audio, or if you will be doing other things on it as well (e.g., word processing, email, spreadsheets, Web browsing, and so on). Generally speaking, if you dedicate a computer for audio only, you may be able to use one that is somewhat less powerful. A mixed-use computer will almost certainly have to be more powerful, in order to handle the larger set of demands that you are placing upon it. We’ll keep this in mind as we continue.
You can use a Windows-based PC as one option for computer-based audio. A PC with Windows XP, Windows Vista, Windows Home Server, Windows 7, and Windows 8 should all provide what you need for successful audio operation.
On the hardware side, you should plan on the following as a minimum requirement for solid audio playback:
You can check your computer’s specification list, research that online, or check with your computer store or manufacturer to find out whether your computer meets these requirements.
- An Intel i3 processor or its equivalent for fully-dedicated computers; an Intel i5 processor or its equivalent for mixed-use machines
- 4 gigabytes (GB) of RAM (this is the amount of memory that your computer has…not the same as hard disk space!)
- At least 300 GB of hard disk space, and "More is always better!" Remember, though, that you can add more hard disk space by using external USB hard disks, which is how you’re going to store most of your music files anyway. Don’t sweat it if you hard disk is a bit small.
- An Ethernet network connection to link to the Internet (just about every computer has that)
- At least two Universal Serial Bus (USB) connections, version 2.0 (most computers produced in the past 5-6 years have more than two of these).
Naturally, as with all things computer related, more is better! If you have it, or can afford it, this is the preferred set of specifications for computer hardware:
The other two recommendations above remain the same.
- An Intel i7 processor or its equivalent
- 8 GB of RAM (memory)…but here’s your helpful technical note: If you want more RAM, which will help your computer to run faster and smoothly with your audio files, your computer must be running a 64-bit version of Windows Vista, Windows 7, or Windows 8. The 32-bit version of Windows cannot see more than 4 GB of RAM, due to technical limitations. Again, check your computer’s specification sheet or use Windows’ system description to see what you are using.
- 500 GB or more on hard disk space. As I said above, however, you’ll be using external USB hard drives for most of your music storage.
When it comes to desktop computers vs. notebook computers and computer-based audio, it’s generally better to use desktop computers if possible in your setting, since they are more powerful, more configurable, and do not have the compromises for size and battery life. Computer-based audio can be sensitive to the sorts of power management and data transmission compromises that are common on notebook computers. Unless portability is a major consideration, you’ll want to give serious consideration to the more robust desktop alternative.
For Apple computers, there are a handful of good options, in both desktop and notebook computers. Desktop alternatives include the Mac Mini, the iMac, and the Mac Pro. In each case, you’ll want to make sure that you have at least 8 GB of RAM (and more is better, as usual). We recommend 2.5 GHz or more for your CPU speed, as well as all the internal hard disk drive that you can afford. Once again, you’ll be able to add more hard disk space via USB 2.0 later, so don’t worry about internal hard disk storage limitations. Note that, as with Windows PCs, it’s generally better to use desktop computers for audio, since they are more powerful, more configurable, and do not have the compromises for size and battery life mentioned earlier.
For those with Apple notebooks, it is recommended that you use the Macbook Pros with Core i5 or i7 processors. At least 8 GB of RAM should be used for the best audio performance, but if you can afford it, bump that up to 16 GB of RAM. That will give you plenty of elbow room for your music files to play smoothly.
Those desiring a more thorough tutorial on Apple for computer-based audio can check out Dr. Rob Robinson’s excellent discussion at Channel D; see http://www.channld.com/computeraudio.html.
Digital-to-Analog Converter (DAC)
Simply put, a DAC is a device that converts digital signals to analog ones. In this case, it is what turns digital music signals to analog ones, so that your recordings can be played back though your audio system/headphones. DACs have been around in high-end audio for many years now, but have become quite powerful over the past few years. They are now capable of handling extremely high-resolution music without a problem, given the solutions now available to us.
DACs can handle music files that are in two main formats.
The first format is called PCM, which stands for "Pulse Code Modulation." This is a method of translating musical signals into blocks of digital data (zeros and ones) at various clock rates. You don’t need to understand more than that, really, since your computer-based audio system will handle all of this for you.
The second format is called DSD, which stands for "Direct Stream Digital." This method of translating musical signals into digital data handles the zeroes and ones one-at-a-time, at a much higher clock rate than PCM. Again, you don’t really need to understand more than that at this point; if you have a DSD-capable DAC, it will figure this out for you.
Both formats can produce very fine, and even exceptional results. While PCM has been well-established in the past, DSD is now coming on very strongly as a major alternative, with sonic quality that is exceptionally impressive.
The good news is that you don’t have to choose between these two alternatives! Nowadays, there are very many DACs that can handle both PCM and DSD. You can find some of these for sale at places like Acoustic Sounds (http://store.acousticsounds.com/c/133/D/A_Converter_or_Processor), as well as other online distributors and audio outlets. You can also find a list of DSD-capable DACs at sites like Positive Feedback Online (http://www.positive-feedback.com/Issue66/dsd_dacs.htm and http://www.positive-feedback.com/Issue67/dsd.htm) and Audiostream.com (http://www.audiostream.com/content/ever-expanding-dsd-dac-list). There are DACs that handle both DSD and PCM by the dozens, and at price points ranging from $799.00 and upwards. If you have questions about what the most suitable DSD and PCM DAC would be for your needs, please consult the specialists here at Acoustic Sounds, or your favorite audio distributor or store.
Given the presence of both PCM and DSD music, and the reasonable prices of so many of the DACs that can handle both formats, it’s undoubtedly best to choose a DAC that can do both formats. You’ll be pleased with the results, and won’t suffer the frustrations of missing out on that terrific recording because your DAC can’t handle it.
A Side Note About USB 2.0…
One thing that the new generation of super high-resolution digital music has in common is that USB 2.0 is the pipeline for the tunes. If you’re an experienced computer-jockey, you probably know all about USB 2.0. It’s been around for many years now, and is on just about all computers made.
If you’re new to computers, then all you need to know is that it is a port for plugging in a cable that will handle your music data on its way from your computer to your DAC. It will also be an excellent way to plug in external USB 2.0 hard disks, so that you can store your music files in multiple external storage units. The correct USB 2.0 port on your computer should be marked with a logo that looks like this:
USB 2.0 has been adopted by all DSD-capable DAC manufacturers as the supported method of cabling. Since it is available on nearly all computers manufactured over the past 5-10 years, you should have at least a couple of open USB 2.0 ports. You’ll plug a USB cable into your computer, and the other end of the cable into the USB 2.0 port on your DAC. Make sure that you don’t plug the cable into your computer, however, until you’ve read the instructions for your DAC. Quite often, you have to load software onto your computer before you make that connection.
Caution: There are two types of USB ports to avoid for high-resolution audio.
If you are using a newer computer, you may have one or two USB 3.0 ports. If so, they will be marked with a logo that looks like this:
Do NOT use a USB 3.0 port for your DAC, since there are compatibility issues with those ports. Make sure that you only use USB 2.0.
If you are using an older computer (older than 6-7 years, for example), you may even have some USB 1.1 ports. Do NOT use a USB 1.1 port, as it is too slow for high-resolution digital music.
If in doubt, check the documentation for your computer.
Just be sure to use USB 2.0 only.
About USB 2.0 Cables
Some DACs may supply the USB 2.0 cable that you need, but others may require that you purchase one. You’ll need to make sure that you purchase a USB 2.0 cable that has the right male connectors at each end. Usually this will be what is called a USB 2.0 A-B cable ("A" connector at one end, and "B" connector at the other). It will look like this (image courtesy of Positive Feedback Online):
The squarish end of the above is the "B" connector; the rectangular connector immediately above is the "A" connector. A cable like this will cover most…but not all…cases.
Your DAC may have what is called a "USB 2.0 mini" connector for the DAC end. If so, the port will be much smaller than the "B" connector above, and will need a cable that is USB 2.0 A connector to mini USB connector. It will look like this (image courtesy of Positive Feedback Online):
You can see that the connector to the right is much smaller and rectangular.
The main thing is to get the right connectors on either end of your USB 2.0 cable. If the correct cable isn’t supplied with your DAC, then check the USB port on your DAC, and purchase a cable that matches. If in doubt, check with the DAC manufacturer for the proper cable type.
By the way, it is our experience that cables do make a difference!
You can certainly use a generic USB 2.0 cable, but you’ll likely find that audiophile-quality USB 2.0 cables will improve the sound of your playback. Many fine audiophile cable makers are producing excellent USB cables for computer-based audio; check with your preferred source for a USB cable in your price range.
Music Software – Windows PC
The third component that you’ll need in your computer-based audio system will be the software on your computer that will play your music files. This is the computer application that will translate your computer files into signals that your DAC will then convert into analog for your audio system.
JRiver’s Media Center 18 (image courtesy of Positive Feedback Online)
You can do research to choose high-resolution audio software; Super Hi-Res makes no statement of preference of one software package over another. One major alternative on the Windows PC side of things is JRiver’s Media Center (http://jriver.com/audio.html). This is a very complete application that can handle both DSD and PCM files of all current resolutions. The file can be downloaded from the JRiver Web site link listed above. The trial period is free; after the trial, you can purchase a license for the price listed at their site. Currently, the cost is $49.95, which is quite reasonable given the capabilities of the software.
Media Center downloads and installs like all Windows software: read the instructions, click on the link, and run the installation procedure on your Windows-based PC. The installation will place all of the software and drivers necessary for your computer to be able to send high-resolution audio files through the computer’s USB 2.0 port to your DAC.
Once installed, configuring the software for a given DAC will depend on the particular DAC that you’ve chosen. Many DAC manufacturers have specific information for the major playback software packages like Media Center, which makes the task easier.
There are several different ways to setup Media Center for DSD and PCM playback, depending on the way that the DAC has been designed. Since this can vary, you’ll have to read the documentation that comes with your DAC, and follow the instructions from Media Center. Experience is that the setup of the software and the DAC is generally pretty straightforward, but when in doubt, check with the application company and the DAC manufacturer.
Music Software – Apple Mac
Channel D’s Pure Music computer audio system for Apple computers (image courtesy of Channel D)
On the Apple side of the ledger, just as with Windows PCs, you can do research to find what music playback packages are available at the time you are ready to bring a computer-based audio system online. A major alternative in the Apple realm is Pure Music from Channel D (http://www.channld.com/puremusic/).
Like Media Center, Pure Music is capable of handling both DSD and PCM music files, and is supported by many different DAC manufacturers. Available from the Web site above, Pure Music can be purchased for your Mac Mini or Macbook computers. Once again, you follow the instructions from Channel D to download and install your Pure Music package. The configuration of the software for a given DAC will depend on the DAC that you purchase. You’ll want to check the instructions that came with your DAC for the specifics of configuration; check with Channel D in the event that you have questions about how to complete the setup with your DAC.
The final piece of the puzzle is your Internet connection. Many locations throughout the world now have high-speed Internet connectivity for your computer, with prices that are reasonable for this very useful aspect of modern life. A good high-speed Internet connection will allow you to purchase and download your high-resolution music files easily, and store them on your computer or external hard disk.
If you’re reading this, the good news is that you probably already have high-speed Internet access! If you are still using slow options like dial-up access, you’ll want to check the availability and pricing of high-speed options (cable, DSL, wireless, or satellite) in your area. This will make it possible for you to download the files that you purchase quite easily.
Once you have a high-speed Internet connection, you’ll have the final piece of the high-resolution computer-based audio puzzle!
Putting It All Together
So, we’ve made a list of things that you must have for a successful high-resolution computer-based audio system. Let’s review them:
Once you have all of these, then the assembly of your system will probably follow the steps listed below. You can use this as a flowchart to give you a general sense of how to put things together.
- A computer of sufficient capability to handle the task
- A Digital-to-Analog Converter (DAC) that is capable of high-resolution operation in DSD and PCM and which has USB 2.0 connectivity
- Playback software on your computer
- A high-speed Internet connection (for the purchase and download of your high-resolution music files)
Note that there may be some variations, depending on your particular system. You’ll have to consult the documentation from your DAC manufacturer and your software manufacturer before proceeding. When in doubt: re-read the documentation!
- Make sure that your computer and Internet connection are hooked up, and that your high-speed access is working properly. If there’s a problem, get that resolved with your Internet access provider.
- Purchase and download the appropriate playback software for your computer. Follow the manufacturer’s instructions for setting up the software, and complete them.
- Unpack your DAC, and place it near your computer according to the manufacturer’s guidelines.
- Plug in your DAC and power it up.
- Plug in the appropriate end of USB cable to the DAC.
- Do NOT plug the USB cable into the computer yet.
- You can plug the DAC analog outputs to the rest of your audio system in the usual way, either with unbalanced RCA cables, or with balanced XLRs, depending on your DAC. (If you have a headphone jack on your DAC, and are going to listen on headphones only, then you’re done…you’ll just plug in your headphones.) Remember to keep your volume muted until you’re done.
- Read the documentation for your DAC covering the type of computer that you have. Quite often you will have to load software before you connect the USB cable to your computer; make sure that you do this in the order specified in your documentation. Note that Apple computers may not need this, but Windows PCs will usually require this step.
- After the DAC software is loaded, this is usually the time that you’ll plug in your powered-up DAC into an open USB 2.0 port. Remember that this must be USB 2.0; do NOT use a USB 3.0 or 1.1 port.
- Your computer should recognize the new USB-based DAC within a minute or two. Wait until the recognition and device load completes; your computer should notify you of a satisfactory device installation. After this initial setup, you should not have to repeat this procedure, provided that you do not switch USB ports in the future. We strongly recommend that you use the same USB 2.0 port for your DAC in the future; it will avoid the complications of your computer reloading DAC software on each different port.
- Now you can open your audio playback software for music. Run through the setup procedure for your particular DAC, as outlined in your DAC’s documentation, and in your playback software’s guidelines. There will be one setup process for DSD, and another for PCM. This is often the trickiest part of the setup, but once you finish the procedure successfully, you won’t have to do it again. If you run into problems, check with your DAC manufacturer and/or your playback software manufacturer. They are very experienced in helping their users fix any problems that come up. Take advantage of their assistance to get this done correctly.
- Once you have your playback software talking to your DAC correctly, your next step is easy: Start purchasing and downloading your new albums in their super high-resolution formats.
- Enjoy your growing collection of super high-resolution music!
One Other Thing…Backup Your Hard Disks!
We should mention that you’ll find that high-resolution audio files do take up a lot of storage space. After all, DSD and high-resolution PCM recordings aren’t highly compressed .MP3 files! As your collection grows, you’ll find that there usually isn’t enough room on your computer’s internal hard drive to store very many albums. You’ll want to add external hard drives to your computer as time goes by, so that you can store your albums without being limited. This isn’t a problem, however, since very large (1, 2, or even 3 terabyte) external USB hard drives are relatively inexpensive and easy to purchase down at your local Costco, Best Buy, Office Depot, or other favorite computer outlet. Both Seagate and Western Digital, for example, offer solid, cost-effective external hard drive solutions.
You can easily add hard drives this way, following your computer’s procedures for loading and unloading external USB drives.
Please notice: external USB hard drives should be drives with their own external power supply; that is, an AC adapter with power line to the hard drive. Our experience is that external hard drives that do not have their own power supply and are powered by only their USB 2.0 cable, can have problems playing high-resolution music reliably. You may experience dropouts during playback, always an unpleasant thing. Powered external hard drives will avoid this problem.
Remember that you’ll want to back up your hard drives periodically, to preserve your investment. You can copy one external hard drive to another periodically, which is probably the best way to do this, or you can copy a single album’s music files to a DVD-R disc. There are procedures for doing this online; Google up help files if you need them, or visit computer audio sites for help. The truth is out there!
As you look over these notes, you may be saying, "I can’t do this!"
Actually, you can. In fact, as I noted earlier, in many ways, this is easier than doing something really complicated like setting up an ultra-expensive MC cartridge on a tonearm…now that can be hard! Take heart in the fact that many tens of thousands of fellow music lovers and audiophiles have already done this quite successfully. You can do it too!
And believe me, the payoffs are very significant. DSD and high-resolution PCM digital files provide extraordinary fidelity, and won’t wear out. Your investment in computer-based audio will reap rich dividends in future musical enjoyment.
Don’t wait…it’s time to jump in!
More than 25 years ago, as digital technology began staging its ascent to what would eventually lead to a complete transformation of the audio industry, founder and CEO of Acoustic Sounds, Chad Kassem, began selling vinyl records out of his two-bedroom apartment. While the majority of the audio world was working only towards improving the accessibility and convenience of music, Kassem would go further by dedicating himself to finding and eventually producing audiophile-quality records of the absolute highest fidelity. Kassem’s passion for quality – recording, mastering, pressing, artwork – remains the core of the Acoustic Sounds mission.
Beginning in the late 1990s, downloading rapidly became the dominant vehicle for listeners to buy and enjoy their music. But most people did not recognize the sound quality being sacrificed in the name of listening convenience. Acoustic Sounds remained committed to supplying customers with the highest-quality recordings that could only be found via physical media, namely vinyl records and SACDs.
But digital audio has evolved to the point that we can now offer music downloads without lowering the trusted Acoustic Sounds quality standard. So now, with more than 25 years of experience delivering the world’s finest selection of audiophile recordings, we are pleased to announce the launch of the Super HiRez music store, which brings both accessibility and convenience to the same audiophile-quality recordings with which our name has become synonymous.
Super HiRez is dedicated to making downloading high-resolution music a simple and stress-free experience. By offering various downloadable formats and providing step-by-step guides, Super HiRez makes it easy for all listeners to get the most out of their music purchases.
Super HiRez offers audio quality that far surpasses that of the CD and that should not even be in the same conversation as an MP3. Listeners can hear their favorite songs as if they were in the recording studio, ultimately giving them a more enjoyable and immersive listening experience. To help put the difference of sound quality that high-resolution audio provides into perspective, a useful analogy can be found by comparing it to high-definition television. As you sit back in your easy chair nowadays and watch your favorite team with remarkable clarity that lets you literally see the beads of sweat on each player’s forehead, think back to your game-day experience a decade or less ago when you could barely make out the name on the back of a jersey. While HDTV gives viewers an opportunity to see a difference from the image that their old televisions projected, Super HiRez provides listeners with the chance to hear a difference from the sound found in a traditional MP3 download or even a physical CD.
While the digital age saw video quality and convenience improve simultaneously, the development of audio hasn’t been quite as linear. As digital technology allowed audio to break free from the physical restraints of the compact disc, it also introduced a slew of new bandwidth and storage limitations. As a result, some audio quality was lost. But now listeners can experience their favorite music with remarkable clarity and with the same convenience that is offered in lower resolution downloads.
At a quick glance, high-resolution music downloads can seem intimidating to the inexperienced user. Perhaps you’ve done some research on your own and found only a handful of sites that offered little or no information other than the download links themselves. Super HiRez offers a step-by-step tutorial to walk even the most uninformed beginner through the process of enjoying hi-res downloads.
We offer a variety of download formats, giving listeners several options based on their own system requirements and listening preferences. To our ears, Direct Stream Digital (DSD) is the format that provides the closest approximation to original, analog sound. But Super HiRez ultimately is about choices. We also offer high-resolution PCM files for those who prefer or are set up to enjoy their files that way.
A wide array of audio playback applications are available to suit the needs of every listener. We have gathered a comprehensive list of some of our favorite playback applications that includes some of their distinct capabilities. All of the applications listed are compatible with the download formats offered through this site.
For those of you interested in a premier listening experience, DSD is the preferred download. DSD-capable hardware is readily available for audiophiles everywhere as several manufacturers have released D/A converters and media servers capable of DSD playback. We recommend several options that will provide the optimal audiophile listening experience.
So what are you waiting for? Now you know why Super HiRez is the best place for audiophile-quality downloads. Getting started in high-resolution music downloads has never been easier, and we hope that your listening experience will be better than ever!
Call it “high-resolution”, “high-res” or “hi-rez” — Refers to various kinds of high-definition audio files for downloading music.
DSD — “Direct Stream Digital” — A system for digitizing music that is often compared with analog in terms of sound quality. The format used to produce Super Audio CDs.
• DSD format captures sound as a one-bit sound wave sample, but it measures the sound wave 64 or 128 times the sampling rate of CD audio — either 2.8 MHz or 5.6 MHz. For some engineers this is the closest a digital file sample can get to an original analog source. The result is much more life-like quality than MP3 or CD. DSD is available as either 2-channel (traditional stereo) or multi-channel (surround sound) files.
PCM — Pulse-code modulation— Traditionally the most common method used to digitally represent sampled audio. This method of audio conversion is the standard used by most digital audio formats, including CD, MP3 & AAC, DVD & DVD-Audio, and Blu-ray & Blu-ray Audio.
• Multi-bit high-resolution audio files sport an identifying number sequence: 192-kHz/24-bit or 96-kHz/24-bit for example. The first number refers to how many times per second the sound wave is measured (sampled). The second is the number of bits of information in each sample. CDs use 16 bits sampled at 44.1kHz, but there is no single standard for high-resolution audio.
• Hi-res PCM albums are also sold in a variety of playback formats including FLAC, ALAC, AIFF, WAV and others. The info in each is identical, but with FLAC and ALAC, the data (not the sound) is compressed so it takes up less space, similar to a Zip file. These “lossless” file types are designed to keep intact the audio quality of the original source.
• DAC (Digital to Audio Converter) — A device capable, when connected via USB port or Firewire computer interface, of transfering files to play on analog stereo. DACs (depending on the type/number of inputs) can also connect to the digital output of audio devices — such as CD players, TVs, audio/video receivers, etc.) by a SPDIF or Toslink (optical) connection.
• Media Servers — Home media servers give you the ability to pull up a piece of entertainment in a matter of seconds from various digital sources. A media server may be dedicated to just audio playback, for example, but others can play your personal home media library — music, as well as home movies and photos — from a compatible computer, smart phone, e-reader or other device. You can use these multi-function media devices for video sharing from YouTube, streaming music from Pandora and Spotify or sharing photos from your family vacation via Flickr and Facebook on your HDTV. The server options, capabilities and services offered are numerous, depending on the model.
A Bit About Bits
You'll note that many of our Super HiRez FLAC files are derivatives of a 44.1kHz base - i.e., 44kHz/24bit, 88kHz/24bit, 176kHz/24bit. That, instead of 96kHz/24bit or 192kHz/24bit. Please understand that the higher the number does not always mean the higher the quality. When we produce a FLAC file converted from a DSD master (which is not just acceptable but affords many sonic advantages), we choose to convert to a 44.1kHz base because it sounds better than converting to a 48kHz base. The reason is that the conversion math is simpler. In short, the 176kHz is going to sound better coming from DSD than would the 192kHz. The quality difference between 192k and 176k does not make up for that sonic advantage.
So, rather than convert to a 48kHz base because the numbers will look more impressive, we've chosen to make the conversion that will actually sound the most impressive.
DSD is the only uncompressed format that we offer although we do not offer any formats that use lossy compression. We have not considered offering .WAV or .AIFF since .FLAC can be decompressed/converted to either .WAV or .AIFF bit-perfect with no loss, similar to encoding and decoding a .zip file. By having smaller downloads it saves download time, internet bandwidth, & hard drive storage space. We are aware of the controversy about quality differences with WAV/AIFF vs FLAC/ALAC lossless compression schemes but none of that makes a difference if you decode your FLAC files to WAV/AIFF.