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New HRoom Ultra Desktop DAC, performs signal upsampling?

post #1 of 5
1/14/10 at 5:21pm
Thread Starter 
Hi Tyll and technical HeadRoom staff:

I´ve just bought one of your UDACs to use in my home made music server system to operate between a MacBook Pro (s/SPDIP Toslink) and a Krell KCT preamplifier (vía balance connectors). Since I didn´t listen the UDAC before I put the order, I bought it only trusting in your website recommendations. After reading the technical specs of the new SABRE DAC it´s not clear for me if this DAC performs signal upsampling when the incoming audio data is 16/44 (typical CD rate)

I´m curious about this, because you used to underline this point in the case of the other DACS you use in your staff, but in the specific case of this SABRE DAC I could not find this information.

Thanks in advance guys for some illumination here
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post #2 of 5
1/15/10 at 5:13am
Quote:
Originally Posted by guguplex View Post
Hi Tyll and technical HeadRoom staff:

I´ve just bought one of your UDACs to use in my home made music server system to operate between a MacBook Pro (s/SPDIP Toslink) and a Krell KCT preamplifier (vía balance connectors). Since I didn´t listen the UDAC before I put the order, I bought it only trusting in your website recommendations. After reading the technical specs of the new SABRE DAC it´s not clear for me if this DAC performs signal upsampling when the incoming audio data is 16/44 (typical CD rate)

I´m curious about this, because you used to underline this point in the case of the other DACS you use in your staff, but in the specific case of this SABRE DAC I could not find this information.

Thanks in advance guys for some illumination here
Hello,

The Sabre DAC employed in the HeadRoom Ultra Desktop DAC is indeed a "full-time" up-sampling design that is proprietary to ESS Technologies. I'll hazard to add the ESS fellers keep a lot of their patented topology information pretty close to the vest!

Cheers,
jorge
HR Service & Sales Manager
HeadRoom was founded in 1992 & manufactures headphone amps, DACs, and accessories; and sells headphones & related personal audio gear. We offer exceptional products, customer service, & information.
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post #3 of 5
1/15/10 at 12:37pm
Thread Starter 
Thanks a lot for the replay Jorge. Pretty much clear now.
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post #4 of 5
1/15/10 at 2:13pm
Jorge, can you shed more light on this? How does it upsample? to what resolution? Is it user selectable? is there a difference between USB and Coax and Toslink? Thanks.
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post #5 of 5
1/16/10 at 5:36am
Quote:
Originally Posted by Jalo View Post
Jorge, can you shed more light on this? How does it upsample? to what resolution? Is it user selectable? is there a difference between USB and Coax and Toslink? Thanks.
the difference between usb and optical/coax connections is that in usb it can take only 16bit/44.1khz sampling rate while on optical/coax it can handles pretty much all valid sampling rates (16/44.1 to 24/192).
I don't think the output sampling rate is user selectable, and about the resolution,I am not sure, but I think that it is not a regular 24/192 upsampling, it is higher than that. if you will search,there is a thread in this forum that talking on this dac in more detail, but from what I remember tyll saying is that this technology is upsampling to some crazy sampling rates.
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