Audiophile USB to PCM


I have an excellent upsampler and dac (dCS Purcell/Delius) and am looking for the very best USB to PCM conversion. So far, I've tried SlimDevices Squeezebox, and Xitel Pro Hi-Fi link.

Both are very good, but I was wondering if there are any other options I should be considering. Both the Sutherland USB Preamp and the Wavelength USB Dac convert to analog. I'd like something of similar quality that stops short of the digital to analog conversion so that I can let the dCS gear do that.

Any suggestions would be appreciated.

harry
hbrandt
I double checked, I am using the ASIO with foobar... The waveterminal does not upsample, however.
Edsilva - have you had much trouble with pops and ticks with ASIO and Foobar?

Is it the ASIO .dll or ASIO4ALL?
Hmm... Neither ASIO.dll nor ASIO4ALL.dll shows up if I run a search on *.dll. Yet, the Waveterminal behaves like its ASIO, the "control panel" says "ASIO 2.0" on it prominently, and the website states: "MME & DirectSound Driver, ASIO 2.0, Direct KS for SONAR" under features. Is ASIO something they could have licensed and baked into the ESI24.dll driver?
Edesilva - I got a deal on a U24 a few months back. I'm running the V 2.61 driver. My control panel doesn't say ASIO 2.0, just an ASIO "logo" in the corner. Foobar recognizes my U24 as an ASIO capable output device. I believe the capability is inherint to the esiu24.dll. No ASIO dll in my system files either.

Would like to experiment with the upsampling and SRC however I am content with my 44.1 performance. I have experimented with the Convolver DSP plugin. I have acheived my absolute best sound utilizing ASIO ouput as well as this plugin. Specifically utilizing an impulse entitled "SPL GoldMike Impulse.wav" On some slightly "brighter" recordings I have had excellent results with a "neutral.wav" impulse. I believe I got these at a site called www.noisevault.com

I did try a friends DIY NonOS DAC with the U24 (less the Convolver plugin) and the sound was easily bested by the plugin utilizing the GoldMike impulse. The plugin does not increase CPU usage on my computer at all.

At any rate, Convolver is a great plugin in my camp - but be worth a little experimentation in yours as well. Have fun.
Is ASIO something they could have licensed and baked into the ESI24.dll driver?

Very possible.