On 4/5/06, Michele Carla` <[EMAIL PROTECTED]> wrote:
On Wed, 2006-04-05 at 08:16 -0400, Timothy Miller wrote:
> I'm more concerned about noise and oscillations. I think you're right
> that a simple reflection over less than a centimeter won't be a
> problem for us. If we can tri-state the transmitter, and the receiver
> has sufficiently high impedence, I don't see why we couldn't connect
> them in pairs to let software select the direction. Only the
> transmitter needs to be switched off, while we'll just ignore the
> receiver when we're transmitting.
>
> How do you tri-state an analog signal without distorting it? Just
> cutting power to the opamp probably isn't enough because of whatever
> will happen to the analog signal when it goes into the output of an
> opamp.
No this isn't a good idea (IMHO), what about a VCA ?
>
> > > USB wouldn't have enough bandwidth for so many channels at once.
> > > Sure, there's lots of kinds of processing where the data would never
> > > leave the card, but in many cases, you're going to be shipping data
> > > back and forth with the application. You need high bandwidth for
> > > that, and even PCI might not be quite fast enough if all channels are
> > > uncompressed.
> >
> >
> > ?
> >
> > I make 192kHz x 24bits to be 4608000 bits per second. Sixty channels of
> > that is 276.48 Mb/s. All of USB2, 1394 and gigabit ethernet are capable of
> > that. The trick is probably getting the latency down.
>
> I see your point. We're going to have some sort of latency anyhow due
> to the external box, though.
60 channel at > 100 Mb ...I don't think there are really problems for
latency. we are talking about time ~ 10^-5 s
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--
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Frustra fit per plura quod potest fieri per pauciora
Entia non sunt multiplicanda praeter necessitatem
Occam's Razor
MiChele Carla` aKa Goldfinger <[EMAIL PROTECTED]>
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Tim,
and list; I see a lot of legacy slots being discussed. PCI ect, is a thing of the past. I am dead serious. IMHO you really *NEED* to be thinking PCI-Express x1 if that will handle your bandwidth, or possibly x4, or even x8 as there are ***A - LOT** of new mother boards out that are SLI capable and many will allow for the 2nd x8/x16 slot to be used for something else. Targeting legacy is a loosing proposition, there is a truly huge audience begging for good PCI-Express add in cards. Please do not take my word for this, research it some, go to forums and ask: Hey guys if we release *Card-X* in PCI-E would you be possibly interested? And see what the response is. I can nearly guarantee you it will be overwhelming. Anandtech, HardOCP, and Techreport are three very well established web sites / forum communities that you could go to and I absolutely gurantee you they would welcome your dropping by and asking their opinion ect. They are really a great bunch of guys and gals. There are of course more, but what I am trying to foster here is your getting into *The Community*. If you are willing to take a bit of extra time I very honestly think you will find the exposure can be Very Positive for you. These 3 sites would be a great start for getting FeedBack on proposed products. They are not Linux Central but they are linux open minded and many use Linux Gaming Servers ect. so the prospect of talking to you for native linux audio/video I believe would be taken very seriously.
Tim if I am off base with these posts please sir do not be shy about telling me to please be quiet. I will not take offense I promise you. I am just seriously Pro Timothy and company. Let me be crystal clear: I have a Visa Card in hand RIGHT NOW, you say the word and I will Pre-Order both a Video Card and Audio Card and authorize up to $500 U.S. total for the 2 speculative cards. I know you have said in the past you would not feel comfortable taking money unless you have a shipping product. I am here to tell you For Sure I am willing to put my money where my mouth is. This year between June and September I will be building a business system for myself. From watching the list I doubt you will have anything out and ready for consumer consumption. But I can always add in one of your Video cards, and one of your Audio Cards later on, and I would be extremely happy to be able to get rid of the binary only drivers in place of Open Source drivers for my Spankin' New OSS HardWare!! I feel that I am not the only one ready for OSS hardware, There are a TON of newb's who would like to try Linux but they always say: What sound card and video card should I have that will "just work" like my Windows cards do? They also of course always ask about network cards but that is already an area that is good to go for linux :)
I will say this however, IMHO you really need to put serious thought into your 2nd Gen. shipping video card being a good 3D solution that entry/mid level gamers could appreciate. Hey not every gamer has an unlimited budget for the latest sooper dooper OMG Tech :) A good many of us will appreciate a mid range solution, and more than a few of us will "pay a little more than its *worth*" to support the Linux initiative. Perhaps you could consider offering Generation 1 buyers an upgrade trade in value to "trade up" when the Gen 2 parts ship. Not a give away as no start up company is likely to be able to absorb something like that, just an advertising "throw them a bone" type offer they can nod their heads over and feel better about.
Have a good one,
Gary Sheppard
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