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Old 27th December 2011, 05:07 PM   #221
a.wayne is offline a.wayne  United States
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Only from people who believe that nothing has advanced since 1968.
Updated to 1979 ....
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Old 27th December 2011, 05:08 PM   #222
SY is offline SY  United States
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aw, nice price!
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Old 27th December 2011, 05:20 PM   #223
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The M-Audio card is amazing. Build a simple interface and it becomes a very powerful tool.
FWIW, with soundcard and software I can see harmonic distortion that changes with frequency and with load. That's got to make a difference and isn't something you see in the classic measurements.
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Old 27th December 2011, 05:20 PM   #224
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Any recommendations for any USB-based sound cards for those who no longer have a desktop PC?

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Old 27th December 2011, 05:22 PM   #225
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I use the M-Audio USB cards. Limited to 48Khz full duplex, tho. I think the Firewire can do 96Khz duplex.
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Old 27th December 2011, 05:29 PM   #226
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Alas, no Firewire on my Windows laptop.

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Old 27th December 2011, 05:38 PM   #227
Pano is offline Pano  United States
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I get by pretty well with the 48Khz sampling but would be happy if I could move to 96KHz.
Maybe someone else makes USB soundcard that will do higher rates, duplex. My spare PC has the 1/2 hight PCI slot, so the Audiophile card won't fit.

I like the USB card and its phantom power, the balanced or unbalanced ins and outs, the SPDIF in and out, the ease of use. I still use my o'scope, but the soundcard is now #1 in the lab.
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Old 27th December 2011, 05:43 PM   #228
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M-Audio 192 card in a cheap HP PC, which allows both balanced and unbalanced I/O as well as SPDIF I/O. Street price is ~$150.

.... snipping for conciseness ....

with a little elbow grease and one-off jigs, I can get just about all the measurements that an AP2 is capable of with the PCI card.
I have been using an EMU1616m with a custom breakout box (several actually) for years.

In fact, I can easily make some measurements with that setup that are difficult using AP2 (like PSU rail noise audio FFT), but there is stuff where even the AP2 does not suffice and stuff where it can measure things the Soundcard based set-up cannot.

A major problem is that all these measurement systems invariably involve a lot of averaging, be it digital or analogue. So there are questions this gear just cannot answer and yet they are the ones that matter IMNSHO.

And for answers to those questions I am back to very blunt tools.

Ciao T
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Old 27th December 2011, 05:48 PM   #229
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I think the Firewire can do 96Khz duplex.
My Edirol (now Cakewalk) FA66 does 4 channels of 24/192 duplex.

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Old 27th December 2011, 05:48 PM   #230
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Rubber mallets? Cricket bats?
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