You need to send back the output into the input. You'll have to fiddle with the gain knob in order to avoid saturation.I have an high end soundcard, it’s a Focusrite Red4Pre, I will make some measurements to check how it performs
probably I will ask you guys for some help on how to perform the tests with REW
Actually measurements above 50k are just amplitude/phase, so they can be carried out with a different set of tools, typically a function generator, that can be had for about €100, and an oscilloscope ( I have a portable one that I paid €88 for on Ali).
There is usually no need for distortion measurements at >50k.
Of course, second-hand lab gear is an excellent solution.Same. Except I use an old sine and square generator with levelled output good to 550kHz, and an ancient but well cared for Tektronix 465B.
Truth be told, the generator settles pretty quickly that, providing I sweep at a sane rate, I'm able to get a good handle on audio range frequency response this way before I even think about hooking up an interface.
I use ASIO. Haven't tried but I've read somewhere that the Windows driver does not allow 192k.Try different soundcard latency (buffer)settings to see if you can find a sweet spot with REW Abbey , certain values tend to work better than others and not nesesarily the lowest value. Ive never been able to get 32 bit float as an option in REW only via Asio so I assume your using the Windows driver ,
I still have to see a mfgr publishing frequency responses above 20k.The SSL2/2+and the Audient are playing in the same ballpark for a little more money but I cant find a BW response for either beyond 20k .
If you do, tell us how it fares.I did see a brand spanky new SSL2+ the other day with VST liscences intact , 150 euro , very tempted to bid .
Ah Ah! Which ones?When I looked at a few soundcards that had 384/768k capability, and that provided a bandwidth spec (a rarity) it seemed as if it was the opamps in the circuit path that were limiting bandwidth as I couldn't identify any soundcards with bandwidth exceeding about 140kHz.
Indeed there are now several affordable soundcards that handle 192kHz sample rate. However many are restricted in actual banwidth. Of course none can achieve 96kHz BW.My post was about finding anything >192kHz sampling. On review, what I saw as 140kHz bandwidth limit is what was reported earlier in that thread as the default ADC bandwidth, and likely not related to opamp limitations. I'm just pleased that there are present day product that can do 96kHz bandwidth that is somewhat entry level price (well at least the Scarlett is).
You need to send back the output into the input.