Audio-gd Digital Interface - Page 136

It's curious that we don't have a consensus on the effects of upsampling.

Same result here. I already using DI without upsampling but when I took out clock sound get more transparent and hard passages (eg many instruments playing different partitions at same time) get more clear. I am using it with nfb10es btw.

 

Indeed, very curious. I tried non-upsampling mode this afternoon and liked it, just not as much in Classical scores. I feel that the instrumental separation and soundstage in complex symphonic music is better with up-sampling. On vocals (Patricia Barber, k.d. lang) with small instrumental groups, the sound is extremely truthful and non-fatiguing. I frankly can't tell the difference between “up and non-up” on Rock band tracks like, for instance, Angra's various albums or Pink Floyd's DSOTM and Division Bell. The Dead Can Dance discography, however, sounds sensational with up-sampling. Well, this last group has always been extremely well recorded so maybe it really doesn't matter what setting on the DI you might choose.
 

 

uelover,

 

The TCXO and the Tentlabs were each burnt-in over a 3 weeks period each. This was something I had been testing for the past 2 months before posting the results here. Yes, the volume on my DACs remain the same. I sent an email to Kingwa asking about this and whether the circuits are affected by the insertion of the clock but he gave me a very generic reply saying that clock will only be used when in upsampling mode.

 

Edited by rhythmic_impulse - 5/24/11 at 10:19pm

i'm going to receive the Audio-gd PSU for DI next week and i'll also definitely buy an USB isolator dongle because i really hear how my PC pollutes the sound.

a guy named "Leeperry" had massive experiments with those, so, following his impressions, i guess i'll buy this one: http://www.olimex.com/dev/usb-iso.html

Is it the same as those "Adum4610 something" usb isolator?

Be kind to share your impressions upon arrival.

it's one of them. yes. there i a variety of adum4160 realizations and as i've read - the Olimex one is the most interesting of those.

Simple question (can't seem to find the answer on the AUDIO-GD site) - if we are inputting a 16/44.1 signal to the DI, and using the 96kHz upsampling, is it also converting the 16 bits to 24 bits?

 

Reason I ask is that I am using a non-oversampling AD1865, so I am trying to work out what signal it can accept.  I think the 96kHz is okay, but I am not sure about 24 bits as it is an 18 bit DAC chip.

ad1865 should understand 24bits.

i have a DAC on ad1862 and it does.

Just installed a 74VHC04N in my DI. Huge upgrade (and I haven't even burnt it in yet) for such a small investment, mainly in terms of bringing out detail. My music sounds almost like it's in slow motion the way that the details are being fully conveyed now. Can't wait to get a few more hours on it.

Nice to hear that.

 

I have difficulty sourcing for one on my side. Mouser charges USD30 for shipping and a few cents for 74VHC04N which is a little too ridiculous.

 

eBay doesn't sell the VHC variant but sells the HC variant.

 

 

What are the difference?

what do you mean by "slow motion"?

Live rock band sounds like acoustic version? Lol.

The HC is the same as what's in there by default. VHC is what borrego recommended. I have 3 of these VHC left and I could ship you one if you paid me $2+airmail. Shoot me a PM if you're interested.

The music almost seems slowed down because of the amount of detail being resolved. Instead of notes playing into eachother they're more separated and discretely positioned than before. Soundstage also seems improved.
Edited by somestranger26 - 5/27/11 at 6:04pm

reporting:

i've bought an Audio-gd PSU for DI from a nice guy here if FS forum, received it an hour ago.

that's a nice upgrade, i should say.

imho, not worth $120 (as it would cost me to be shipped from Kingwa), but for the $72 shipped that i've payed, it is pretty good.

feeding DI with a usual D-link 7.5v/1A PSU (taken from my internet-router) sounded nicer than usb-powered. feeding it from audio-gd's PSU gives twice better improvement comparing to a that PSU.