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Author Topic: Does this preamp exist?  (Read 2067 times)

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Offline tedyun

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Re: Does this preamp exist?
« Reply #15 on: November 16, 2018, 01:08:05 PM »
Huh -- looks like I was wrong. The USBPre2 does not simultaneously output digital to USB and analog.

Test set up:

DPA 4011 > XLR > USBPre2 > USB out > Laptop Dock > Adobe Audition > signal detected

........(same as above).........> AUX out (RCA) > RCA to mini cable > Sony M10 (line in) > no signal detected.

Unplugging the USBPre2 from the laptop and powering it from a USB dock (ie., running it in standalone mode) restored the analog signal.

Also, I think you had a question about the digital in:

DPA 4011 > XLR > Grace V3 > SPDIF out > USBPre2 > USB out > Laptop Dock > Adobe Audition > no signal detected

.........................(same as above)...........................> AUX out (RCA) > RCA to mini cable > Sony M10 (line in) > no signal detected.

Again, unplugging the USBPre2 from the laptop and powering it from a USB dock restored the analog out signal.



I thought it could. My impression of the block diagram is that the analog signal gets split right before the ADC, so it should be simultaneous. I think when you plug it into the PC via usb, the SPDIF signal gets switched off.

Block diagram is on pg. 31:
http://cdn.sounddevices.com/download/guides/USBPre2ug_en.pdf

I can test it out with my USBPre2. I'll report back tomorrow. I will plug the mics into the XLR in, then go XLR out and usb out into my computer. Is that OK, or if you want me to set it up like you will be running it, just let me know.


    I thought the USBPre2 could do all this? When you want to record digital out via usb, do you mean that you want to record to your computer?
Basically yes.  Can the USBPre2 output digital and analog simultaneously?[/list]
« Last Edit: November 16, 2018, 04:01:01 PM by tedyun »
Mics: B&K 4011, Schoeps MK5 (Nbobs, Naiant PFA), Busman BSC-1 (K11/K21/K31/K41 caps), Church CA-14 (o, c), Church CAFS, Core Sound Binaurals
Pre: EAA PSP-2,  Lunatec V3, Nbox-Platinum, Church CA-9200
ADC: Mytek 192 ADC, Oade Mod SBM-1
Rec: Oade Supermod PMD-661, Tascam DR60D, M-Audio MicroTrack II, Korg MR-1 (32GB SSD mod); Sony PCM-M10, Edirol R09HR; iRiver HP-120
Photo: Canon 5D3, Canon EF-S 17-55mm f2.8, Canon EF 35mm f1.4L Canon EF 24-70 f2.8L MkI, Canon EF 70-200mm f2.8L IS MkI, Canon EF 50 mm f1.4, Canon EF 50 f1.2L, Canon EF 300 f/4L IS, Canon EF 100-400 f4-5.6L IS MkI
Video: Canon HF100

Offline heathen

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Re: Does this preamp exist?
« Reply #16 on: November 16, 2018, 05:26:15 PM »
So if there's a digital signal going to the USB, there's no analog.  If there's only power coming through the USB, you can get analog.  Would you say that's accurate?
Recordings on LMA: https://archive.org/search.php?query=taper%3A%22Lucas+Lorenz%22
Mics: Core Sound TetraMic | AT4031 | AT AE5100 | AT853 (C/SC) | Line Audio CM3 | Sennheiser e614 | Sennheiser MKE2 | DPA 4061 | CA-14 omni Pre: CA9200 Decks: Zoom F8 | Roland R-05

Offline tedyun

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Re: Does this preamp exist?
« Reply #17 on: November 16, 2018, 05:44:31 PM »
That's correct!

So if there's a digital signal going to the USB, there's no analog.  If there's only power coming through the USB, you can get analog.  Would you say that's accurate?
Mics: B&K 4011, Schoeps MK5 (Nbobs, Naiant PFA), Busman BSC-1 (K11/K21/K31/K41 caps), Church CA-14 (o, c), Church CAFS, Core Sound Binaurals
Pre: EAA PSP-2,  Lunatec V3, Nbox-Platinum, Church CA-9200
ADC: Mytek 192 ADC, Oade Mod SBM-1
Rec: Oade Supermod PMD-661, Tascam DR60D, M-Audio MicroTrack II, Korg MR-1 (32GB SSD mod); Sony PCM-M10, Edirol R09HR; iRiver HP-120
Photo: Canon 5D3, Canon EF-S 17-55mm f2.8, Canon EF 35mm f1.4L Canon EF 24-70 f2.8L MkI, Canon EF 70-200mm f2.8L IS MkI, Canon EF 50 mm f1.4, Canon EF 50 f1.2L, Canon EF 300 f/4L IS, Canon EF 100-400 f4-5.6L IS MkI
Video: Canon HF100

Offline Nick's Picks

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Re: Does this preamp exist?
« Reply #18 on: November 18, 2018, 08:53:06 AM »
Mix pre 3m does it all in style for $500

Offline Ronmac

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Re: Does this preamp exist?
« Reply #19 on: November 18, 2018, 10:38:22 AM »
RME BabyFace Pro hits all the marks.

In addition to your spec, it also includes MIDI I/O, dedicated digital I/O (ADAT/SPDIF optical), 2 additional line ins, 2 headphone outputs (1 mix with 2 connectors, high/low impedance) and the incredible TotalMix digital mixer.

It also has a Class Compliant mode, so recording to an iPad/iPhone is possible.

« Last Edit: November 18, 2018, 10:42:30 AM by Ronmac »

 

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