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icon5.gif  Question about digitising vinyl records & RIAA with ULN8 3d pb9 - dull sound [message #87727] Mon, 07 September 2020 14:28 Go to next message
thoren is currently offline  thoren
Messages: 2
Registered: September 2020
Location: Vienna, Austria
Junior Member
Hi, i'm a new ULN-8 3d owner and wanted to digitise my vinyl records. I did the following: connecting the rca output of a high end dual turntable via a dap audio rca>xlr adapters with the xlr sub-d inputs (mic) analog 1+2 of the uln8 without any pre-amplification before the inputs. The gainsetting was 51.5 on the uln8. The uln8 was connected via lan with the macbook pro (MacOS 10.14.6).

Then in mioconsole 9 i loaded an miostrip insert on stereo analog 1+2 with the RIAA eq curve on number 1 of the eq (activated). The other numbers deactivated. The "to host" setting was post. Recorded in 24/96.
Is that the correct/usual method so far?

The problem is the sound gets dull when the RIAA curve kicks in (listening on beyerdynamic DT 770 PRO), compared to the regular amplified hifi sound of my lehmann phono preamplifier and compared to a cd version of the song. As if the highs were reduced.
I did this with a newer vinyl from inakustik reference sound edition, so a very highend vinyl recording.

I didn't expect that, as so many people rave about the sound quality of the uln as phono preamplifier with riaa curve. When i play music from harddisk, streaming over the uln8 or record an instrument or mic, there is absolutely no sound problem, fantastic sound on the dt770, so i don't know what to do.

Did i do anything wrong or have i forgot something?
Thanks for any advice.

Would be very cool, if there were any tutorials or video tutorials about such things with the MH 3d interfaces & mio console as guidance.

Best regards
Andreas

[Updated on: Mon, 07 September 2020 14:31]

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Re: Question about digitising vinyl records & RIAA with ULN8 3d pb9 - dull sound [message #87728 is a reply to message #87727] Mon, 07 September 2020 15:05 Go to previous messageGo to next message
bj is currently offline  bj
Messages: 434
Registered: July 2011
Senior Member
When people are talking about using it as a Phono stage, they are talking about using it with the Phono mod for the DI board. The terminating impedance is far too low on the Mic Pre inputs to use as the input for the phono stage - it loads the cartridge down and will have the effect of rolling off the high end.

We have a phono mod available for the DI board that provides appropriate termination for the phono stage; that, coupled with the RIAA EQ curve, is what people are talking about.

The Phono-mod version of the DI board can be installed in the field. If you would like to explore this option, please open a support ticket:

https://mhsecure.com/support
Re: Question about digitising vinyl records & RIAA with ULN8 3d pb9 - dull sound [message #87729 is a reply to message #87728] Mon, 07 September 2020 15:57 Go to previous message
thoren is currently offline  thoren
Messages: 2
Registered: September 2020
Location: Vienna, Austria
Junior Member
Thank you for the fast reply!
That means without this phono mod there is no alternative way to digitize vinyls with the uln8 than using an external preamplifier and line inputs to record it.

I use the uln8 mainly as my computer audiointerface for recording synths, guitars (front DI), mics and music production in the box. Vinyl digitizing would have been a bonus i thought could be done easy.

Are there disadvantages or any function losses with this mod that would affect my main purpose and how will it be installed? Can i deinstall it if i don't need it anymore?

What would it cost and is it only available over MH-US (shipping to US) or also MH germany, where i bought the uln?

Is the ULN-2 3d different in this regard and maybe easier for vinyls?

Thanks again for answering.
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