Nice reply and not too long, and actually a nice reply, Its good where we can share stuff and get on with life!
I was going to actually measure the ripple on the Vcc line but I got lazy and dont have a o'scope at home anymore, but do at work in the lab. I would think that for the most part the ripple that would be present (and yes I do think there would be some) is probably not a real issue any more but unless you measure etc you never know.
I have run into a few people that again have issues with popping and ticking and other playback stuff and they indeed do think that it is USB power related good or bad. Who knows in their cases maybe they have a crappy USB supply in the pc. The one person who I do respect that was telling me about his issue had another brand dac that did not exhibit the issues on the same pc and it had several supplies...and thought that this was the problem.
So whether someone posted this or that in thread, this being an ODAC thread its nice to have people post stuff that they experience etc..where it be objective or subjective. Yes people do get wrapped around the axle on things even me!! But I hope the good outweighs the bad...move on.
I actually have sent a note to the designer on some issues and have not received a reply. If I do I will share with you guys.
NWavguy has stated that the ODAC is not perfect but compares well with other dacs more expensive I beleive the one he refers to it the $1600 Benchmark DAC1? But in his blogs, and they are long and deep...he does mention other dacs with superior anti-jitter "circuitry"....the design goals he uses from my viewpoint are just wonderful....whether he is right or wrong will be debateable etc...so the old blind A/B testing etc seems to be one way to try to see if something really matters and that leads to heated debate.
I agree that the ODAC with its specs is not the one and only DAC that has great specs ...its not unique, but at the price point and its simplistic design point its definitely in the running for a best in this price point class for performance....when you compare it to a $1600 Benchmark DAC1at $1600 or so? with a $99 dac and honestly have a hard time telling the difference...well maybe the DAC Magic is a better DAC, better built, more supplies, real copper chassis??, better shielding....(I am guessing here), weighs more, looks better etc...makes you feel better etc...great.
Heck I compared it to my HRT MSii+ which cost me $350 with the ODAC and I cant hear any difference. But the lights on my HRT sure look cool when they light up with the various bit depths and sample rates....
But sonically with my ears, cans and loudspeakers its a wash....to me.
The IMD CCIF chart that you posted is interesting. But their are more specs than that on the list NWavguy "thinks" are important and affect the potential audio etc.
So yes there are other audio devices that measure the same, better and worse than the ODAC. Its hard to get from a vendor all the specs in this list....another debate.
•Frequency Response: +/- 0.1 dB (10 hz - 19 Khz 24/44)
•THD+N 100 hz 0 dBFS: 0.0029%
•THD+N 20 hz -1 dBFS: 0.003%
•THD+N 10 Khz -1 dBFS: 0.003%
•IMD CCIF 19/20 Khz -3 dBFS: 0.0011%
•IMD SMPTE -1 dBFS: 0.0004%
•Noise A-Weighted dBu 24/44: --102.8 dBu
•Dynamic Range: > 111 dB A-Weighted
•Linearity Error -90 dBFS 24/44: 0.0 dB
•Crosstalk 0 dBFS Line Out 100K: --93.5 dB
•USB Jitter 11025 hz J-test 24/44: Excellent
•Maximum Output Line Out 100K: 2.0 Vrms
•Distortion: < 0.005%
•PCB Dimensions: 49.0 x 58.0 mm
I being the engineer type would choose the better measurement or the one that you provided if that was the only measurement etc...
The thing is here John, which one sounds better to you?
The sound might not be the only thing that influences a person to buy one item or another.
The great news is this is a cheap dac...and you can buy one love it or hate it...and its sure made other vendors take note....and many of us as well.
Now let me go find my Jerome supply ( and yes I really do have one!!) and I will go in and hotwire one of my odacs and see if I can hear anything for the better or worse?
John!! Thanks for the nice reply I look forward to your personal experience with this Dac.
All the best