audio interface question

[jeremiahkdavis]

I just purchased the Audio-Technica ATH-M40fs headphones. I've set me mind to start producing electronic-dance music and eventually in the next month or two I will get a midi keyboard.
Should I get an interface or just get an 1/4" to 1/8" adapter from the local Radioshack?
If an audio interface is the way to go please list some for me to check out. Not much money to work with ($50 max)

Thanks for reading my post.

[eyeatus]

save the cash for the keyboard... unless you plan on getting monitors or a mic too

[outbound]

save the cash for the keyboard... unless you plan on getting monitors or a mic too

+1

[Reversed]

Just wanted to throw this in there too: These headphones have 60Ohm impedance, which means some onboard sound chips in PCs / laptops might not handle it well. I know my sound chip didn't, cutting off the lows at higher volumes, so be sure yours is able to handle it, or maybe get a really cheap PCI soundcard if not.

[jeremiahkdavis]

Just wanted to throw this in there too: These headphones have 60Ohm impedance, which means some onboard sound chips in PCs / laptops might not handle it well. I know my sound chip didn't, cutting off the lows at higher volumes, so be sure yours is able to handle it, or maybe get a really cheap PCI soundcard if not.

Never knew of a such thing! If it helps I have a mid-2009 Macbook Pro 15". I looked at a mixer ("Behringer XENYX502 5-Channel Mixer") and I think that is the way I should go because eventually after I get a keyboard I'll get monitors and such.

Added: I did some research on "ohms" and "impedance" and sort of understood it.
It says most macs have 24ohm and from what I understand the lower the number the better for the source?
This is all kind of hard for a beginner to wrap his head around.