SoundCard for LOW Frequencies & Mac

[Svenrox]

:bounce:
Hey guys, I need suggesstions for a sound card (external may be better) for my Mac Powerbook 1.33Ghz. Preferably with midi input too. Something that goes well below the 20Hz to 20kHz range, down to below 10Hz if possible. (1Hz to 10Hz for the low end would ROCK!)

Ideas??

[Smithcok]

Lol.
What kind of sound are you working with that goes down to 1Hz???
Imagine the room you would need to actually support the existence of a full cycle of that wave.

I would suggest an interface of some sort. How many inputs/pre's will you need? What is your budget like, what sort of work will you be doing?

[wfhscoyotes]

Wavelength = 5 yards, LOL.

I actually have no idea of what lambda is for 1 Hz, I bet its pretty huge.

[Svenrox]

You're right! Huge wavelengths. I'm creating waveforms with function generators to convert them into 2D and 3D shapes.
Low tactile transducer stuff...
ideas? maybe there's a gaming card that gets low enough?

[Smithcok]

Wouldnt the wavelength be approximately 340 meters?
One cycle per second. Sound travels at ~340m/sec (I know.. its like 343.4218 or something, but close enough).

You are way below the boundaries of human hearing.

[Svenrox]

it's the infrasonic range. you feeeel the sound. Half my equipment shakes the house.
ok, so how do I see the same frequency of say 12Hz in its higher octave so I don't have to build something to go so low? ie: is there a simple conversion, like multiply 12Hz by XXXHz to see it's identical yet more complex pattern?

[Smithcok]

I was joking about the "build a room thing"
The typical boundary for human hearing is around 20Hz.

Im confused on why everything has to be SO low. I dont know what low tactile transducers are, but what's wrong with converting waves that you can very functionally reproduce (and hear for that matter)?

[Rad]

Yes, no card that I know of will go below 20Hz, 16Hz is barely audible and below is completely inaudible for humans - there's plenty of evidence on that, so no card that I know of goes THAT low. What on earth is a low tactile transducer?

[Svenrox]

tactile transducers are 'speakers' that are purely the magnetic portion design for heavy low bass that you can 'feel'. I build a tactile bench that has a couple mega tactile speakers under it, and I can guarantee you when I say that maybe I can't 'hear' 6hertz, but the entire neighborhood sure can feel it! it's insane. But more importantly is the healing effects of these low frequencies. The earth resonates at 7.83 hertz, which is a theta to alpha brainwave. so I'm trying to reproduce brainwave activity by converting them to shapes. It's a long story. But anyone who tells you that below 20hz isn't important has been brainwashed by the illuminatti :)
I guess the most known tactile transducer on the market is the Buttkicker system or Clarks, or Aura Bass Shakers. Check it out and feel for yourself.

I've seen sound cards hit 10Hz, but I can't remember where...

[cmchamp]

So to answer your question from a few posts back "How do I see 12Hz" up an octave - is there a formula? Yes, it's pretty simple. For every doubleing of frequency you move up an octave. So if you want to see what 12Hz looks like, use 24Hz, then mentally 1/2 the image - well, if you're using an oscilliscope, you'd mentally double the horizontal distance.
C.

[Svenrox]

Thank you, that helps a bit. I beginning to 'see' that :)
So 12Hz would be the same at 192Hz but 4 series of complexity higher?
12Hz -> 24Hz -> 48Hz -> 96Hz -> 192Hz
which is about where I can begin to see what I am talking about in m experiments...
Does this sound right to you? If there are 4 equal shapes at 192Hz, there probably would be 1 shape at 12Hz.
hmmmm, I'll have to try that out...
Thank you!