Not all PC audio hardware includes such a low high frequency cutoff. http://www.clarisonus.com/Research%20Reports/RR001-SoundCardEval/RR001-PCsoundCards.html
Based on the above review, the following cards which are still available have a response that extends significantly above 60kHz: http://www.m-audio.com/products/view/audiophile-192 http://www.lynxstudio.com/product_detail.asp?i=11 http://www.lynxstudio.com/product_detail.asp?i=12 On Wed, 4 Jan 2017 21:21:22 +0000 (UTC), you wrote: >A PC can certainly generate a lot of frequencies. But if you want to use the >audio channels at 60KHz there is a little problem. There is a brick wall >filter in the audio channel set at about 25 KHz. > >Now I could set up the audio to output 15 KHz I and Q and mix it (quadrature >mixer) with 45 KHz X 4 (precision source) to get 60 KHz. And then filter it >to get the 60 KHz. Which requires some op amps. And filters. A precision 45 >KHz source. A gray code counter (divide by 4). And stuff. > >Easier to work at DC (my "audio" signal) and mix that up to 60 KHz directly. >Besides. I do like designing and building hardware. Engineering is the art of >making what you want from what you can get at a profit. >I like Polywell Fusion. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
