Marvel
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Posts posted by Marvel
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It could be that particular M-Audio card (more of a consumer version, although higher numbers of sales can be good). There is a company in Vienna, that uses the M-Audio Super DAC for playback in its system they have for creating synphonic sample libraries. They had something like 30 engineers working around the clock to record, edit and build the libraries. You can get them preloaded on hard drives, but the cost is several thousand dollars. If you were an arranger doing movies sound tracks it would be so cool. The samples are really good. I know it sounds like I am defending them (yup, guess so). The card deluxe is a very good card, with good convertors on it, but you would certainly up the price. My Audiophile 2496 will pass DTS and whatnot through the spdif if I remember right, which could be fed into an external decoder. There's so many options and ways to empty the wallet!
And I have to correct myself -- I mentioned digidesign as the maker of the 896 firewire box, but it is MOTU (Mark of the Unicorn), and the M-Audio firewire i/o 4 in/4 out, will be available sometime in April. It is a model 410, but no other designation yet.
Just remember -- the good thing about standards is that there are so many of them.
Marvel
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kjohnsonhp,
Dowload the demo of CoolEdit Pro from the Syntrillium site. It is fully functional for 30 days, and will do 24/96. Many of the demos or other free ware stuff will not, even if the card will. Goldwave only lets you up the sample rate, but the bit depth stays the same. Lower priced versions of Quartz Audio do likewise.
Dave,
What is the MBS-3 (showing my ignorance again)?
I have a Tascam DA-30 MKII dat that I really like. Can't tell there is anything between what I play and what I here back. I know people are dumping ADATs like crazy, but it's paid for and still works great. I don't use it enough is all.
Marvel
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Dave,
What kind of ribbons do you use? I admit to only having some inexpensive AKG condesnors (CS1000s), and older dynamics (EV RE16), but they have fulfilled my needs so far. Had an acquaintance quite a few years ago who used a Beyer Ribbon for a live vocal my. It sounded just wonderful with her voice.
I still want an 8 i/o for firewire, but the drivers/support for the Digi 896 under Windows is very bad, and the new Presonus Firestation says they only have XP drivers (I'm using Win2k). M-Audio sorta has released a 4 in firewire box, the M410, but it isn't on their web site although dealers have it advertised. Duh!
Marvel
ps I do music work with an ADAT XT20, although I am wanting to move soley over to a DAW based setup.
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kenratboy,
Attached is a pdf with a short explanation and a graphic. It's easier to see when drawn out. It really only gets weird when you start adding values that are way different, like three 16 ohm speakers and five 8 ohm. Figuring that out would be more of a challenge. Having all the same values makes it much easier. If you follow through and do this, let us know how it works out. Cutting the front baffle would sure get tedious.
Marvel
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Nice to see a set of real plans that I can add to my collection. Thanks for posting them.
Marvel
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Follow through a step at a time:
Four 8 ohm speakers in series = 32 ohms
Do that again and you have another set at 32 ohms.
Look at each set as one speaker now, 32 ohms each.
Put those two in parallel and you have one speaker of 16 ohms. If you had four sets @ 32 ohms and put them in parallel, you would have an 8 ohm speaker array, holding 16 speakers.
I could send you a drawing. Getting all in phase would be fun though.
Marvel
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Tony,
I apologize for blaming you for those drawings (much bowing and groveling going on!!). When I got info from you I had also been scouring the net. I just found the link in an old folder of favorites, to the site that had them. The site is no longer around (http://www.electric.org/ls.html). But the story is pretty much the same, a friend had done the drawings for this guy, the more I recall, from some sketches and measurements.
Did you ever get to measure the freq. response with the added two pieces on yours (or did you do that). I do still have your drawings somewhere as well.
Others here may recall that djk made many sets of LS bass bins. He had jigs made to cut all the pieces accurately and quickly. I had the privilege of hearing some a few (too many) years ago. The hardest part is the roof of the doghouse (or part that points toward you).
Marvel
Marvel
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The LS1.zip file is not exactly correct. The access hole is shown as a 7inch on a side piece. Couldn't get the woofer out of that cabinet very well. I think this set was done by a friend of Tony Reed's (wherever he is now), who took measurements off a real set of LaScalas.
Middle set is the German ones in metric with previously stated errors. Looks like the same with the third set.
Marvel
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If someone drove through my front window, I might feel like my life was threatened. But I have a permit for where I live. If you ever find a book called "The Best Defense", give it a read. It is stories based on actual events, culled from newspaper articles and interviews. From store owners in the Carolinas with 357s to a little old lady in Florida with a .25 calibre. Or take Kennesaw Georgia for instance (not too far north Atlanta):
Kennesaw rocked the world when on May 1, 1982, the Kennesaw City Council unanimously passed a law requiring all heads of households to maintain a firearm and ammunition. The law was passed partly in response to a law passed in Morton Grove, Illinois (June, 1981) banning private possession of handguns. Since passage of the law, the burglary rate in Kennesaw has gone down significantly, while the rate in Morton Grove has gone up.
"Before the law was passed we had 11 burglaries per 1000 in population. As of 1992 we had 2.7 burglaries per 1000 population. Over the years, it may fluctuate 1% higher, or 1 or 2% lower, but its something that's stayed in line from '83 all the way up to today." (Kennesaw Police Chief Dwaine Wilson, 1994)
As of 2000, the burglary rate in Kennesaw was even lower making it one of the safest cities of its size in the United States. It is all the more astonishing given that Kennesaw has quadrupled in size since passage of the gun law.
The law was mostly symbolic, but ceratinly made a point. While it scares me greatly to think of ever having to use a weapon/handgun, many people defend themselves often, without a shot ever being fired. There are more than enough real statistics to show that. But gun owners must also obey the given laws where they reside, and know how to properly handle (fire and clean/maintain their gun). A lack of responsibility will ruin it for us all. I have good friends whom I respect, who don't believe in owning firearms. It isn't worth the argument with them (or them with me), to get into it with them. We just happen to disagree.
Marvel
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kenratboy,
Was going to post this from work, but we were working on the firewall today and things were up and down.
I'll be showing my age here, but way back in the '60s either Popular Mechanics or Popular Electronics had an article on how to build a speaker system that used 16 five inch speakers (called the "Sweet Sixteen"). Each speaker didn't have to work much, because in total they moved a LOT of air. This is the principle of Steve Decker's line eight I believe. Many speakers working in unison means none of them are very stressed and work well (insert own opinion here). If you want to use multiple speakers, you just have to calculate the impedance values so you end up with what you want. You don't need a crossover. For example: four 8 ohm speakers can be connected to yield an 8 ohm load, a 32 ohm load, a 2 ohm load, or others.
Resistance in series:
R total=R1 + R2 + R3 + etc
Resistance in parallel:
1
R total=-----------------
1 + 1 + 1
--- --- ---
R1 R2 R3
Hope that is clear. Speakers are measured in ohms as impedance, which is a combination of resistance and reactance (inductive). Resistors have a fairly linear resistance to current flow. Coils (inductors, coils in speakers, etc.) have a reactive opposition to current flow, based on different things, but it varies also with frequency. This is why a speaker's impedance varies depending on the frequency of the signal being fed to it. Certain crossover filters present no load depending on the frequency. This can be fatal to an amplifier. Inductors (chokes), are measured in units of the term Henry. It is the measurement of Counter Electromotive Force, or cemf.
School's out for the day. We could talk about litz wire (which is used in the inductors Al K uses for his crossover), and why it is better than solid wire (it's the skin effect).
Marvel
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Duh, I was asleep at the wheel. I knew they were way cheaper than the regular 1010, as it puts everything in a breakout box. People either love the M-Audio gear or hate it. It has worked excellent on my Dual Athlon 1.4Ghz box.
Samplitude is next!
Marvel
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This has 6x6, 24/96, uses the same driver as Audiophile 2496. Has 4 analog, plus spdif: $299
http://www.zzounds.com/item--THKMIMD662
The 1010LT (same driver) does 8 analog i/o, spdif, midi, 2 mic inputs(XLR). Uses a fan out cable instead of a breakout box:
http://www.zzounds.com/item--MDOD1010LT
But the cost is getting up there (around $600 or so I think)
Marvel
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I use an M-Audio Audiophile 2496 in one of my computers at home (used for video editing and audio production. It uses the same DAC?ADC as their other 4 and 8 channel cards. The quality is outstanding. I know many professional musicians/studios use the same cards. The cost is about $150 ($229 list), and it has spdif i/o as well as analog i/o. It will allow DTS and AC3 through the spdif out for external decoding.
If the Revolution is the card you got, it provides 7.1 etc and decoding. It should do nicely. I hate those mini plugs. At least the one I have uses rca jacks. They are a little more solid. You may need to download the newest drivers, even though the card is new they probably already have newer.
The Card Deluxe is another great card, but was too expensive when I got mine.
Marvel
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Not sure what you mean be dbx "going under" unless you mean they are owned by the Harman Corp. now. They no longer make high end consumer items, but make great studio products (E.Q.s, Comp/limiters/gates, preamps both digital and tube combos). They are in daily use in so many studios (just not mine, although they make a couple products I would like to get).
An easy way to add some dynamic range back into vinyl tranfers would be great though.
Marvel
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I could mail you the three CDs if you want. I already have them at work as we use Red Hat at the college where I work. I believe we have the current version as well. Drop me an email if you want, with your address, etc. Have the new Free BSD as well. More servers use it than RH.
Marvel
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An historian friend of mine presently works at the Edison Historical site in N.J. They are currently working on a project using Edison's original recording equip., and bringing in all kinds of talent. Jazz, folk, blues, rock, and recording them on wax cylinders. They are then tranfering them to digital format for archival purposes. They even recorded my buddy as he plays a good hard slide guitar (acoustic -- I think he used a Dobro that day). To record well it requirs pretty high volume since it was a mechanical recording. They gave him his wax cylinder at the end of the day. He said it sounded just like a lot of old old recordings that have been reissued. I've got the list at home, but they had done Peter Paul and Mary, Buck Pizzarelli (sp?), and some others.
Marvel
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Erik,
Have you ever looked at Plitron transformers. Toroidial for SET and PP, etc. They have a couple stock ones wth close to the impedance for the primary that you mentioned. One is around 1885 ohms (model PAT 4006), another 1239 (PAT 4008). Lots of cool stuff.
You'll have to dig a bit, there is no direct link to the page with tube transformers on it.
Cheers,
Marvel
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I'm very curious about the chroming on the transformers. I was showing the pics to a friend of mine. He agreed they are a work of art. He thought it was odd though, because he said the chrome will work as an insulator. He is a vintage VW buff, and said folks who chrome the valve covers on their VWs see a 30 degree rise in engine temp. I would hate to see the trannies get to hot. Don't see many chrome wood stoves either.
But they look soooo coool!
Marvel
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Got this from the Berklee.edu website. Hope it helps.
For starters, the DVD-A supports LPCM in a wider range of sampling rate options: 44.1k, 48k, 88.2k, 96k, 176.4k, and 192k, at bit resolutions of 16, 20, and 24 bits. At the highest sampling rate and resolution, this yields a theoretical audio performance of 96k bandwidth and 144dB of dynamic range! Note that there are now supported sample rates that are integer multiples of the current CD standard of 44.1k. This makes it easier to record a project at, say, twice that rate (88.2k), and do a simple downsampling to 44.1k for CD release, whereas downsampling from 96k to 44.1k is a more complex process with potentially greater loss in sonic quality. As in the DVD-V format, the DVD-A format supports bit resolutions up to 24 bits. However, unlike the DVD-V spec, the DVD-A has no lossy data compression schemes as a mandatory consideration, although provisions have been made to utilize them as options.
You can see the whole article here:
http://www.berklee.edu/bt/112/alook.html
Cheers,
Marvel
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With the driver attached to the LPAD, use your meter across the input terminals (what would be coming from the amp). You should see the resistance stay the same as you adjust the slider. Make sure you have no power on (actually, disconnect the speaker from the amp). I could send a drawing if you need it.
Marvel
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Gil,
I at first thought the colors were kinda pukey, but he is my son. I'm just impressed with the drawing of the player itself. This is a good sign that the money for this education will pay off someday.
So what do you think of some of the color schemes that Klipsch has had for their web page?
Marvel
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Justin,
The web site design you did looks nice. It loads pretty quickly. SOmething dial up folk can like. Some sitesa re pokey even when using broadband. I tend to like the les is more design philosophy.
Marvel
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Okay, it is a low rent amp, but someone has to have some idea here. The worst part is the output transformers are NOT very big (very little iron).
I just acquired (for free) an old Knight Kit (Allied Electronics) tube amp, and need some help finding a schematic for it. Okay, maybe I don't really need a schematic, but they are always nice to have. The model is a KN928, and it has four 12AX7 preamp tubes and four EL84 output tubes. Anybody willing to guess what the output poewr of this might be? I'm guessing maybe ten tp fifteen watts per channel. I don't really know the EL84s that much. The amp is pretty clean, and has been stored inside. Not like someone putting it out in the barn for a few years. It is missing one of the EL84s, so at least one of those is in order. The EL84s are GE and the 12AX7s are Amperex (one is a Sylvania). A Raytheon 6CA4 for the rectifier.
The chassis has more steel in it than most new cars. The wiring job was fairly neat, but the layout sure isn't what you would find in newer tube amps, where there is more physical symmetry. I'll have to get my variac out, dig out my meter and check it out. It looks like it will need less work than my Dynaco, as I haven't replaced the 7199 tubes with a different set of parts yet.
I figure this might have been based on a reasonably good design. Then again, maybe it should just be tossed. I hated to pass it up.
Marvel
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Not being from the other side of the pond, someone on the Steinberg/Cubase forum said it means a "masturbator."
A modest hypothesis on the 16 bit question
in 2-Channel Home Audio
Posted
SCSI actually has less overhead than IDE. However, there are IDE RAID controllers out now, and controllers and drives that are 133Mbs.
Craig,
Most fan noise is from the CPU fans and not the PS fan. I have an Enermax in my dual Athlon, but the two CPU fans are too loud. I can't even tell there are two fans in the PS unit. Folks I know who use a computer for a DAW (digital audio workstation) end up putting them on the other side of a wall, with just the monito mouse and keyboard where they work. They can hear spiders on the walls that way. My younger son's new PIV (single cpu) is pretty quiet. I am in the process of building balanced i/o for the Audiophile 2496, and getting a video/mouse/keyboard extender to move my system out of my editing suite (read -- small corner off the bedroom). That's why I still record on my 8 track ADAT, as it is much quieter than the pc. The KVM works over Cat5, so the system can be a few hundred feet away.
You could do water cooling if you wanted to, but the easiest way is to move it.
Marvel