What is HD Audio?

I just read a response by Mark Waldrup, Ph.D., to an article on HD Audio that appeared in SmartHouse News. Mark is the chief engineer at AIX Records. He's also the founder and director of the High Definition Surround Music Association (HDSMA), a non-profit dedicated to supplying accurate information and demos of HD Audio.

In his comments, Mark answers "What is HD Audio?"

Here's the definition the HDSMA prefers - "HD Audio is music or sound that is captured from the acoustic source at or near the fidelity of human hearing."

Mark explains that this means recorded/reproduced sound that has a frequency response of at least 20 kHz and a dynamic range of around 124 dB or more.

He goes on the say that the only consumer formats capable of supporting HD Audio fidelity are SACD and DVD-Audio. However, most of the SACD and DVD-Audio discs released are not true HD Audio because they are performances that were recorded before HD recording equipment was available. The analog tape equipment is only capable of a frequency response of 18 kHz and a signal to noise ratio of 72 dB, which is equivalent to a sample rate less than 44.1 kHz and a bit depth of 12 bits. Mark explains that even though you re-record it at 24 bit/96 kHz, it won't sound any better than the original analog master tape.

Mark also mentions that the HD in HD Radio doesn't stand for high definition, but is instead something like "hybrid digital." I agree that this is only adding to consumer confusion, especially when you consider that the resolution of HD Radio is only 64 kbps, which is half the bitrate of the worst quality MP3 or iTunes downloads available today.

Personally, I think the marketers have really screwed things up. It probably started when the marketing folks at Microsoft referred to the quality of their WMA encoder as "CD quality" when the bitrate was set to 128 kbps. The marketers probably know that if this kind of thing is repeated enough people will just accept it as fact (hmmm, that sounds familiar). Other companies simply play along. Now MusicGiants refers to their losslessly compressed tracks, which are really CD quality, as HD audio to distinguish it from the lossy encoded tracks available from the big music services like iTunes. Their 24 bit/96 kHz tracks are now referred to as "Super HD Audio". According to Mark, MusicGiant's "Super HD Audio" isn't even HD Audio because it was re-purposed from the original analog master tapes instead of recorded with actual HD equipment.

I have listened to 24 bit/96 kHz recordings (both 2 channel and 5.1 surround) from MusicGiants and they do sound better than the same recordings that I already owned on CD. However, I haven't had a chance to listen to the HD Audio offered by AIX Records. I first read about Mark (Dr. AIX) last Winter and am still waiting for them to launch their itrax.com website, which will offer HD Audio downloads. I thought their website was going to go live in June. I wonder what is holding them up... Anyhow, I am looking forward to hearing what Mark calls True HD audio. Hopefully they will have a diverse catalog with a lot of great artists to choose from.

Free "Seduction Music"

Every month, Magnatunes gives away free downloads of
one compilation album on magnatune.com/freemusic.

August's freebie: their "seduction mix," The Art of Persuasion.

What's taking so long?

Just a little update for those of you that might be wondering how our development is coming along...

We are still working on the 2nd generation prototype. There are a lot of updates to the original design. The amp modules are higher quality, the audio interface/soundcard section is going to be much improved and we hope to have a new power section. The main things holding us up are:

1. The audio interface/soundcard section still uses a FireWire (IEEE1394a) interface. Although, this still seems to be the best solution for multichannel sound, we are searching for a good multichannel USB2 solution. In either case (FireWire or USB2), we have a lot of work to do before completing the drivers and the control panel applet.
   
2. We are still waiting for a couple of key vendors to finish the development of their high quality (audiophile grade) switch-mode power supplies (SMPS). A SMPS will be a much more practical solution for a multichannel system. Linear supplies with adequate power will be very large and heavy and we'd like to design chassis' that weigh a lot less than 40 lbs and are smaller than a 1 drawer filing cabinet.

Flashback!

In my Enjoying My Tunes post from June 7th, I mentioned a Genesis concert that I went to in St. Louis when Peter Gabriel was the lead singer. My friend Rocky just sent me a link to this YouTube clip from another concert of Peter Gabriel and Genesis performing the same song: "I Know What I Like (In Your Wardrobe)", so I decided to post it to show what I meant when I said Peter Gabriel's performance was very theatrical.



Thanks for the flashback, Rocky!

2nd Generation Hybrid from LG Announced

This Engadget post (from 7/19, I know... old news, but I was on a short little vacation in northern Wisconsin and missed it) reports on another announcement from LG about their 2nd generation hybrid drives. The $500 GGW-H20LI reads both HD disc formats, and writes at 6x dual-layer BD-R/RE discs (as well as DVD±RW). There's also a cheaper drive that only reads the HD formats, but will write DVD±RW and CD-R/RW. Since the 1st gen drive was priced around $1K and now the 2nd gen is $500, I wonder how long it will take before these are offered for under $100. Maybe a year??

New SongSpot - Reggae Genius

I'm not a huge fan of reggae music like some of you that may have adopted the Rastafarian lifestyle by growing dreadlocks and smoking ganja all day, but I like it (sort of the opposite of the 10cc song "I don't like reggae - I love it") Reggae music brings back fond memories of when I visited Jamaica during my freshman year in college with my UW teammates. I'll never forget walking down a valley road in the suburbs of Kingston around Christmas 1972 when some Jamaican guy told us we were on the wrong side of the earth. Actually he said, "Hey mon, you on da wrong side of da earth." It's probably one of those 'you had to be there' kind of experiences to appreciate.

Like a lot of casual fans of reggae, I like music from Bob Marley, Ziggy, Peter Tosh, Third World, Jimmy Cliff, UB40 etc, but I'm not as familiar with some of the lesser known reggae musicians. Thanks to our friends at Sonific, I found a reggae artist that seems to have slipped through the cracks of my reggae music universe. The latest SongSpot (I know, I've neglected this for awhile) is the song "Fight to the Finish" from Lee "Scratch" Perry. His biography sounds interesting: "Some call him a genius, others claim he's certifiably insane, a madman. Truth is, he's both, but more importantly, Lee Perry is a towering figure in reggae -- a producer, mixer, and songwriter who, along with King Tubby, helped shape the sound of dub and made reggae music such a powerful part of the pop music world."

External Video Cards, Pt. 2

Back in February, I posted an article about external video cards and the possibility of creating a new type of PC audio/video receiver. This would combine the audio functionality of the product we are developing with an external video card.

I haven't really been spending much time researching this, because we are focusing on the audio side of things and video is definitely out-of-scope at this time or our project will never get finished.

Anyhow, I came across another Engadget article (I haven't read other blogs for quite a while, so this is maybe a little dated) about MSI's Luxium external graphics solution. The Chinese translation isn't very clear, but most of it makes sense.

Toshiba's HD DVD burner and Hitachi's hybrid Blu-Ray / HD DVD Drives

Bring on the competition and let the prices drop!!

Toshiba announced a slimline HD DVD burner for laptops (shown on the left) with a writing capacity of 15GB+
(I'm not sure what the plus is for, and I'm to lazy to look it up today. I might update the post at a later date.)















I also found this report on Engadget about the Hitachi GGW-H20N (shown on the right). This internal Blu-ray writing / HD DVD reading combo drive looks to have the same features as this LG drive. Actually, it might be a bit better because it can burn 50GB dual-layer Blu-ray discs, along with BD-R, BD-RW, and the typical flavors of writable DVDs and CDs.

Enjoying My Tunes

When I was young and first getting into music, I only had a few singles or 45s. Actually, most of the collection probably belonged to my two older brothers. I still have a few of those 45s, but nothing to play them on. 'Bend Me, Shape Me' by the American Breed and a bunch of Beach Boys singles (Be True to Your School) are the only ones that have survived. Like a lot of kids, my musical tastes were influenced by what I heard on the radio and from friends. My brothers also had a huge influence on the stuff I liked and my friends older siblings also exposed us to a variety of different music. When I was in Junior High, I started purchasing albums. I liked mostly American rock and roll at that time. I think one of my first albums was Santana's first. The one with the big lion's head on the cover. It was the 60s, so I also liked a lot of the psychedelic and folk/rock that was popular like The Byrds, Jefferson Airplane and The Doors. Of course, I really liked some English rock as well, like the Who, the Beatles and the Rolling Stones.

Then in high school, thanks to my friend Marc Aserlind, my tastes began to expand and I was introduced to Frank Zappa's music. Frank was a genius and I still love his music. However, it's not something that I play as background music while having dinner with my wife and kids ;). My older brother Scott, who by then had started college, introduced me to English prog rock from bands like Yes and Flash. During Scott's freshman year, he bought a really nice stereo system from his college dorm mate's older brother, who I think got it in Hong Kong on his way back home from Vietnam. The system included a big reel-to-reel 1/4" Teac tape deck, so Scott also taped a lot of albums from his friends at his dorm. I really liked the sound of that system, which he set up in our shared bedroom when he came home for the summer. Scott's system was my first introduction to good stereo equipment.

In college, like most people during that time, I was introduced to a lot of new music. By the way, it was cool to have a big stereo, at least for guys (I never met a girl who was obsessed with stereo equipment, but plenty of guys). The bigger the speakers the better. Especially when you could hang them out your window during Saturday afternoon parties before and after college football games. I don't think it's like that today, is it? Do college guys still buy hifi? Or, do they invest in fast gaming rigs and a notebook for their school work? Obviously, a lot of college kids have portable mp3 players like the iPod. So they're using their PCs for storing their music collections and transferring tracks to their iPods for playback through their earbuds. Ah, if they could only hear good speakers, they'd know what they were missing. I just don't think they buy a lot of hifi equipment like they did in my day, but I could be wrong. Anyhow, when I was in college, I shared a house with nine other guys. They were the Preston brothers, Bruce and Keith, Beazer, Jimmy Mac, Murph, Rocky, Brad, Nigel and Captain Dan. They weren't exactly your typical or I should say normal, well-behaved college boys (even though a few of them were real All-Americans). They were from a variety of places - the Prestons were from St. Louis via Racine, Beazer and Captain Dan were from the Minneapolis area, Murph was from San Diego via Cleveland, Jimmy Mac was from Brandon, Manitoba, Rocky - Vancouver, Nigel was from Australia (actually Papua, New Guinea, but he went to school in Brisbane) and Brad and I were home town boys from Madison (and there was Rawdon Peterson, also from Australia, who occasionally lived in our basement). Each of us brought with us our own unique musical tastes. Come to think of it, our musical tastes were all fairly similar or complementary.

The Prestons were huge progressive rock fans. Through their influence, I got into Genesis, Pink Floyd, Jethro Tull, the Moody Blues, King Crimson, Mike Oldfield, Hatfield and the North, PFM, the Strawbs, Gentle Giant, Soft Machine, McDonald & Giles, It's a Beautiful Day, Caravan and Van Der Graaf Generator (to name a few). A lot of the guys in the house were into this type of music and we went on several road trips to Chicago or Milwaukee to see their concerts. I'll never forget the Genesis concert I went to in St. Louis with Bruce and Keith. Peter Gabriel was amazing to watch. I can still remembering him singing, "Me, I'm just a lawnmower - you can tell me by the way I walk" when they played "I Know What I Like (In Your Wardrobe)." It wasn't just the uniqueness of his voice, but the way he performed, it was very theatrical. He was a lawnmower, not an actual machine, but just a guy who mows lawns.

Nigel had to go back to Australia to study dentistry or his grandfather threatened to cut him out of any future financial support. I think they were worried that he'd turn into a Yank if he stayed here too long. While he was here, Nigel signed up for one of those mail order record deals from some company like Columbia. They'd start out by giving you 6 or 12 albums for a buck. I don't remember exactly how it worked, but I think every month you'd get a few more to sample. If you liked them, you kept them. If not, you could send them back. You were billed for the ones you kept and I think you were obligated to purchase a certain number of albums over a set period of time. It was kind of deceptive and I think the practice was probably outlawed. Anyhow, Nigel just kept all the albums and never paid for anything (except maybe the initial $1 to sign up). After he moved back to Australia, we started getting a lot of mail from Columbia asking for payment. They were pretty aggressive, to the point of harassment, even though we told them Nigel no longer lived in our house, or the country. They always included an addressed envelope you could use to pay the bill. It wasn't the same as prepaid postage. Columbia would only get billed by the post office for packages or envelopes they received. So we returned one of their bills after taping the return envelope to a big heavy cinder block (the type college students used to build bookshelves), which we wrapped up with heavy duty packaging paper. We never heard from Columbia again.

I think it was Rocky or Murph who introduced me to Todd Rundgren's music. At first I didn't really know what to think of this androgynous guy who sang "Hello It's Me". I wasn't a big "pop" music fan, but there was something different about Todd's flavor of pop music. I think a lot of it had to do with Todd's humor. He seemed to be having fun and it came across in a lot of his music. Maybe he was the antithesis of macho rock, even though he could really rock. I think later in his career when he took himself too seriously, his music became boring. Todd also provided a link between prog rock, psychedelic rock and pop rock. I really liked how he was able to weave in and out of those genres with a lot of his music, especially his "A Wizard, A True Star" album. Maybe Todd is an acquired taste, because you either love him or not, kinda like Frank Zappa, but once I was hooked, I couldn't get enough of his music. However, I'm not a big fan of his more recent music (maybe I should give it a listen again) and I've been looking ever since for newer music that combines the psychedelic, synthesized pop with his bizarre, irreverent humor.

After finishing college, like most people, I got a job and my circle of friends became smaller and smaller. I didn't go to as many clubs or concerts and didn't just hang out with my friends as much to listen to music. Besides, a lot of my friends - the ones who shared my passion for music, got jobs and/or married and moved away. So I was no longer exposed to the latest and greatest music, at least not like I was during college. Of course I continued to enjoy my music collection, but it wasn't really growing at the same rate.

I was a little slow to go digital. I had a pretty nice analog system, so I was in no hurry to convert everything over to CDs. Obviously, I've made the transition because I use a computer to store and manage my collection, but there are still quite a few LPs that I haven't been able to find on CD. During the 80s I discovered only a few new artists like the Talking Heads, Elvis Costello, Richard Thompson, XTC, the Police and the Clash.

Musically, the late 80s to mid to late 90s seems pretty blurry to me. I didn't really get into hard core punk or the Seattle grunge rock and alt-rock scene. By then I was married and we started having kids. I didn't buy much new music or spend a lot of time really listening to music. The combination of my job and having small children, etc. was all consuming. There were still a few bands that caught my attention, like the Dave Matthews Band, Barenaked Ladies (finally another band that doesn't take things too seriously) Stereolab, Tortoise, the Flaming Lips and Radiohead.

In the late 90s I went to work for Sonic Foundry, a company that developed software for musicians and audio engineers. Most of my fellow employees were pretty passionate about music, many were musicians. That helped to reinvigorate my passion for music. The Internet was also a huge part of my reawakened interest in music. I know the RIAA seems to blame the Internet for all of their problems, but personally, I know I wouldn't be buying as much music if I didn't have such an easy way to learn about new artists. The other component that has really made music fun is my computer. It's wonderful being able to store music on a media server and pipe it around the house or feed a nice speaker system in my listening room. The ability to make custom playlists auto-magically is also something I really enjoy and could go on and on about, but will save for a future post. Obviously, I rediscovered my passion. This is one of the things that has inspired me to start a company to build audio components so others can get high quality sound when they use their PC as a source component.

I've heard a lot of people from my generation complain about the lack of any really good new music. They usually complain that none of the new artists compare to the bands from the 60s or 70s. I think they're wrong. There's a lot of good new music. I'm discovering something new every week using Internet radio like Slacker or going to websites like NPR's "All Songs Considered". I discovered artists like Paddy Casey, the Shins, Postal Service, Bright Eyes, Arcade Fire, the Decemberists through those websites. It's also broadened my musical horizons and I listen to a lot more jazz and classical music. I highly recommend checking out bands like the Bad Plus. I've learned about others while reading the overviews of artists in the allmusic guide and following links to similar artists. And recommendations from artists I already enjoy are pretty helpful. Check out one of these artist's MySpace page and see if they include comments about other artists that have inspired them or that they enjoy. You'll probably discover some older music you may have skipped over and some new stuff that would otherwise never get your attention.