Wednesday, December 09, 2009
Tuesday, December 08, 2009
High Definition Tape Transfers specializes in rare classical recordings mastered with the best mastering equipment available. They are available in Redbook CD, 24/96 DVD and HQCD. We also offer our releases in 24/96 and 24/192 (on select titles) Flac downloads for playback on a High End Computer Audio System.
They have a list of 5 sample tracks available for download on their storefront. Check it out.
Thursday, December 03, 2009
The first is Linn Records. On their website they have an article titled, "What is a Studio Master?" It explains how analog recordings on vinyl or magnetic tape sounded better than CDs because of the analog to digital process that chopped up the perfect waveform into little bits. They oversimplify things and fail to mention the problems when reproducing sound with a needle vibrating inside the groove of a rotating vinyl platter. Anyhow, I don't want to start a big debate over analog vs. digital or vinyl vs. optical disc. I have a pretty good Linn Sondek LP12 turntable that I haven't used for years. I prefer the quality and convenience of playing digital files from my media server to several computer systems, which are connected to my stereo and home theater gear. They go on to tell us that their Studio Master files are much higher resolution than CDs and sound as good as analogue. I would say they sound better than what you will hear from vinyl or magnetic tape. At the end of the article they provide a link to some sample files. I encourage you to download these and have a listen. Obviously, you'll need equipment capable of handling these files. BTW, the article mentions that Studio Master files are encoded at 24-bit or higher and up to 192 KHz. These samples are actually 24-bit/88KHz.
The other source for high resolution audio samples is 2L, the Norwegian music label. They have a few tracks in a variety of file formats and resolutions. They also let you choose both stereo and surround versions.
Monday, September 28, 2009
Even though FireWire-800 has been around for awhile, I haven't found any included on any motherboards yet. These manufactures will probably stop including any FireWire ports - IEEE1394a or IEEE1394b) in future motherboards. Actually almost all of the new small form factor, higher performance mini-ITX motherboards don't include a FireWire port. The future doesn't really look to bright for FireWire.
Some people say USB became popular because a lot of PC systems and peripheral manufacturers did not want to pay licensing fees to Apple for FireWire. So they conspired to develope USB. Sure it wasn't as fast, but for a ot of peripherals, it was fast enough. Then USB 2.0 came along and provided much better performance. Many argued that it was still not as fast as FireWire for things like external hard drives, but for many people it was fast enough. Now USB 3.0 may make the need for FireWire totally obsolete. Except there is that little issue of cable length, which still gives FireWire an advantage.
But maybe USB isn't the perfect solution. I haven't heard of anyone using USB for display devices. Monitors are connected with DVI, HDMI or DisplayPort.
Now we've learned that Apple has pushed Intel to develop a new fiber-optic connection for peripherals called Light Peak. Light Peak could be a solution for just about every PC peripheral. It could replace all the cables we currently use for monitors, external drives, printers, scanners, audio interfaces, etc. Distance isn't a problem, at least compared to FireWire, because a Light Peak cable can be up to 100 meters long. So, will USB 3.0 become the most popular way to connect peripherals? Maybe not.
Originally, I hoped that if a lot of people read about the development of our products and provided some feedback, we could use their comments to help direct our efforts. It would also show there was some demand for our products. One of the challenges any start-up deals with when talking with potential investors or lenders, is convincing them there is a market for their product. One way to do this is to hire a marketing firm to conduct surveys to try and estimate market demand. These sort of surveys might help show if a new health club at a particular location is viable after asking a series of questions to local residents. The more people you ask, the more accurate your results. If your geographic area is large, it becomes a bit more complex. Typically a well constructed marketing survey costs a lot of money. And we chose to spend our very limited funds on development. So, I was hoping the feedback from the blog would help. Well, maybe it has shown there is very little demand for the type of products we are working on.
We haven't totally given up. There are a few interesting technical developments/improvements in the past few months that are promising. So we keep plugging away.
Monday, March 23, 2009
I'm pretty impressed with HDTrack's Download Manager. It is a nice little application for viewing the progress of a download. When you download tracks from some of the other online music stores, the process can seem a little confusing or clumsy. HDTrack's Download Manager is also pretty fast. It downloaded 5 tracks in about the same amount of time it took me to write this post.
If you're interested in checking this out, just go to HDTracks home page click on the "HDTracks 96/24 Ultimate Download Experience" box.
I haven't had a chance to listen yet, so I can't really comment on the quality, but I'm sure it will be pretty good. After all, HDTracks was founded by David and Norman Chesky of the audiophile-record label Chesky Records.
Monday, March 16, 2009
In the summer of 1999, Shawn Gordon founded theKompany.com, a software company specializing in creating developer and desktop software for Linux, Windows and Mac OS X operating systems. TheKompany.com develops both commercial and open source software.
In late 2001, Sharp introduced their Zaurus line of embedded Linux-based PDAs. TheKompany.com jumped on this exciting new platform, creating nearly 40 embedded applications for the device. This led to the development of portable media players supporting both MP3 and Ogg Vorbis, in both standalone and streaming formats, in addition to the development of extensive video playback technology.
In the summer of 2002, Mr. Gordon followed his long passion for progressive rock music and acquired the popular internet radio station ProgRock.com. One of his first acts was to switch it from MP3 streams to Ogg Vorbis streams. This also led to the development of the freely available tkcOggRipper, with which the user can easily rip CDs to Ogg Vorbis files on Linux and Windows.
In late 2002, Shawn followed what to him seemed a logical evolution and founded ProgRock Records as a way to help nurture and support some of the fantastic music coming out of this often overlooked community.
After many brainstorming sessions with some of the ProgRock Records artists and theKompany.com software developers, we realized that we already had most of the technology we needed to pull this off effectively. Now we also had a financial model that also made sense to artists and consumers alike -- so it was time to realize the dream and make it real.
Mindawn was launched in September 2004 and is a wholly-owned subsidiary of theKompany.com, Inc.
It looks like their focus is progrock, which is pretty interesting. Maybe there's other specialty stores like this that focus on specific genres. I'll have to search around and see if I find anything for electronica.
Wednesday, January 28, 2009
This is written on Audium's website:
Today’s audio power amplifiers only achieve optimum efficiency at full output power. Because a typical audio signal has a very high peak-to-average power ratio, amplifiers operate at less than optimum efficiency most of the time.
Audium’s amplifier technology changes all of that by dynamically adapting the DC operating conditions of the amplifier to ensure that it’s always working at peak efficiency.
Benefits include a 20X reduction in power consumption at normal listening levels*, smaller form factor and a saving on heat sinks. What’s more, the Audium advantage increases with the amplifier output power.
*Normal listening level is defined at 70dBC SPL at 1m with a speaker sensitivity of 89dBC/W/m.
Their technology appear to be geared mainly for portable audio, but they do have products with 100W/channel peak power output. The applications mentioned include battery powered MP3 docking station speaker systems and totally wireless speakers for home and PC audio. Obviously, both of these applications would benefit from more efficient amplifiers.
Here's my question: How do they sound?
I can't find any performance specs, other than peak power output and frequency response. No noise or distortion stats. I doubt these are really intended for high fidelity audio.
Tuesday, January 27, 2009
Thankfully, there are a few things that give me optimism. There are two recent developments that really excite and/or interest me. One is the new 32 bit DAC from ESS Technology. The other is the soon to be released switch mode power supplies from Hypex Electronics. I don't have a lot of details to share here, but I can provide a basic overview and will try to get more information and write about it in a future post.
I've written a couple of articles comparing DACs and based upon the specs, it looked like the TI/Burr Brown DACs were best, but ESS actually exceeded all of these with their 24 bit DAC, the ES9008 Sabre. ESS officially announced their new 32 bit DAC around January 5th and I believe demonstrated it at CES 2009 in a private suite by appointment only. The press release claims that the new Sabre32 Reference DAC is the world's best 32-bit audio D/A converter. Using an enhanced 32-bit ESS patented Hyperstream architecture, the Sabre32 further extends the original Sabre Reference's from 24-bit to 32-bit music and raises its mindboggling performance even higher to 135dB dynamic range and -120dB THD. There are 2 versions of the Sabre32 Referernce DAC - the ES9018 8-channel DAC, which is the one we are most interested in, and the ES9012 2-channel DAC. The ES9018 8-channel DAC supports mono, stereo, 4- and 8-channel output modes. These DACs also support very good quality volume control, customizable filter characteristics and advanced jitter elimination capability. To be fair, I should also mention that ESS doesn't claim to have come out with the first 32-bit DAC. I think that achievement belongs to AKM Semiconductor. On December 9th, they announced their 32-bit AK4390 DAC, which is a very nice addition to their line of high quality DACs. However, around the same time as ESS's announcement of their new Sabre32 Reference DAC, they also announced their new Sabre32 Reference ADC, which is the first 32-bit audio A/D converter with an amazing THD of -120dB. Very cool stuff...
Another technical challenge we've been dealing with is the size, weight and cost of high quality linear power supplies. To provide power for 8 channels of amplification requires are very large and heavy torroidal transformer along with the fairly large and expensive capacitors in the power supply circuitry. This becomes a really big problem if you are using 400W or greater amp modules. That is why we've been very interested in the development of audiophile grade switch mode power supplies (SMPS). A lot of electronic devices today, like medical instruments and personal computers, use SMPS technology because of the size, weight and cost savings. However, there are very few choices for affordable SMPSs for audio applications. The biggest problem with a conventional SMPS is electromagnet interference (EMI) and the ability to deal with big changes in load current due to the audio signal amplification. It's easy to design a high quality linear supply for audio applications, but it's a lot more complicated with SMPS. Hypex has been working on this for quite a long time. Awhile ago, I think back in June of '08, they announced the availablity of their SMPS180. Just yesterday, I came across the data sheet for their SMPS400, which I think is suppose to be available in 6 weeks. I haven't had the chance to work with any of these, so I don't know how they sound. Hypex is a pretty low-key company. They don't make products to sell directly to consumers, so you don't get all the usual marketing hype. So it's hard to tell if their SMPSs are something they've made just to satisfy the demand from their OEM customers, or if they are really good. Since it's taken them a long time to develop these, I suspect they are pretty good. The engineers working at Hypex are really dedicated to very high quality audio, so I doubt they would put their names on something that doesn't match the high quality of their amp modules. Here's some useful information from their spec sheet:
"The SMPS400 is a high efficiency Safety Class 2 switch mode power supply specifically designed for use with our range of UcDTM amplifier modules. Key features are high efficiency over the entire load range, extremely small form factor, low weight and very low radiated and conducted EMI. The SMPS400 also features an advanced overcurrent protection which in case of temporary overload simply reduces the output voltage, only when the overload condition remains for a longer time the supply will enter hiccup mode until the overload condition disappears. This feature combined with large electrolytic buffer capacitors leads to the capability of delivering high dynamic headroom power to the connected amplifier. The SMPS400 is optimized from the first phase of design to final implementation to realize the low EMI signature required of the most demanding audio applications."
"Conventional Switch Mode Power Supplies are commonly unsuitable for audio purposes due to poor peak power capabilities and the inability to handle reversed currents generated by Class D amplifiers as a load. The Hypex SMPS400 achieves these things by using an advanced over current protection circuit, a highly efficient 2 quadrant DC/DC converter which is capable of handling reversed currents and has a peak power handling of many times its rated power."
Like I said, I'm excited about this stuff and when I get more info and possible reviews from people who've used these new components, I'll write about it in a future post.
Wednesday, January 14, 2009
Anyhow, I came across a comment on an MSDN blog written by Larry Osterman about the changes the Microsoft engineering team has made during the development of Windows 7. They've introduced the "triad," which is a collection of representatives from developers, testing and program managers. All of their work is organized by triads. All three of these disciplines provide input into the process. Larry says, organizationally, the Windows 7 development process is dramatically better. It's a pretty interesting read -- here's a link to Larry's post.
Having worked several years in software development and project management, their new "triad" structure sounds good to me. The triad reminds me of a conversation I had with Dan Costello many years ago. Dan wanted to use a similar organizational structure with his web development company, Acumium.
Friday, January 09, 2009
"When MP3 files are added (either manually or automatically) to either the Windows Media Player or the Windows Media Center library, or if the file metadata is edited, several seconds of content may be permanently removed from the start of the file. This issue occurs when files contain thumbnails or other metadata of significant size before importing or editing them.
To avoid this, ensure that all MP3 files that may be accessed by a computer running Windows 7 (including those on removable media or network shares) are set to read-only. To do this, in Windows Explorer, find the files, right-click them, click the General tab, and then select the Read-only check box. Then back up all of the MP3 files prior to using Windows Media Player or Windows Media Center.
If some of your files have already been affected, you may be able to recover the data by using the Previous Versions feature. To do this, right-click the file name, click Properties, click the Previous Versions tab, and in the File Versions pane select the most recent previous version."
So going through this procedure to select all MP3 files to make them Read-only could be a major hassle for someone with a mix of MP3s, WMAs, FLACs and AAC files. In my case, I have everything organized by artist, albums and tracks. All tracks in an album use the same filetype, but not all albums were encoded with MP3s. Unless you've got your folders organized by filetype it might take a long time to go through a music collection to modify their properties and backup everything.
Since the warning also applies to MP3 files that are stored on network shares, I think I'll hold off for awhile before installing the Windows 7 Beta. While listening to Microsoft's CES keynote, if I recall correctly, it sounded like Steve Ballmer said they were going to open up the beta for the public today (Friday). If you decide to install the Windows 7 Beta, I'd love to hear back from you if you figured out a good way to protect your MP3 files with minimal hassles.
Thursday, January 08, 2009
To protect your MP3 files:
- Before you install this Beta release, back up all MP3 files that might be accessed by the computer, including those on removable media or network shares.
- Install the Beta release of Windows 7; download and install the Update to Windows 7 Beta (KB961367) located on this page.
Wednesday, January 07, 2009
I'm not sure if this will be an improvement over DVD-A and SACD, but since those disc formats failed, it's worth trying again. It looks like they will be using a music-only format which utilizes Blu-ray disc technology.
Since I don't have any plans to purchase a Blu-ray player, this doesn't really appeal to me. Personally, I prefer just downloading the high res audio from an online music store and storing them on our media server. All my physical discs are stored away in a closet.
Eventually, I plan to purchase a Blu-ray drive for my HTPC and then I'd like to give these a listen. I'd still want to rip the tracks to the server and use my music library software for playing from my PCs.
For more info, click on this article's title and it will take you to the press release.
BTW, I decided not to go to CES this year. Lots of reasons... the economy, tired of big trade shows, better ways to spend the money, etc., etc.