tag:blogger.com,1999:blog-4781727111866727703.post7924863863843273733..comments2024-03-29T00:15:52.117-07:00Comments on <em>Archimago's Musings</em>: MEASUREMENTS: RME ADI-2 Pro FS ADC performance and as measurement hardware.Archimagohttp://www.blogger.com/profile/08642574001287787545noreply@blogger.comBlogger41125tag:blogger.com,1999:blog-4781727111866727703.post-2820228104667335502019-03-14T00:36:40.436-07:002019-03-14T00:36:40.436-07:00Physiotherapy is believed to lead to simple moveme...Physiotherapy is believed to lead to simple movement of muscles and joints to alleviate pain or in case of issue in mobility, however, medicos say that it has numerous other miraculous advantages like the improvement of respiratory organ functions, speedy tissue healing and is useful in healing burns additionally. Studies say that physiotherapy does not solely impact body’s function, however Calgary Physiotherapisthttps://www.blogger.com/profile/09205683255898117929noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-13523225985349515722018-10-22T03:16:29.994-07:002018-10-22T03:16:29.994-07:00I'm sorry if I offended you, it was not my int...I'm sorry if I offended you, it was not my intention at all. <br /><br />I'm aware of the measurement limitations to within the audio band, though I'm not sure if that's the case here. Many measurements in the AK5574 datasheet at least, have been made over the entire frequency band the AK is capable of, starting on page 9 of the datasheet. <br /><br />But even within the limited Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-80178011431066306482018-10-21T22:14:44.393-07:002018-10-21T22:14:44.393-07:00No reason to hit me with words as I didn't do ...No reason to hit me with words as I didn't do that in my reply to you!<br /><br />You wrote: Just think about the out-of-band (from about 23Khz onward) noise that DSD generates!<br /><br />That noise won't change the THD, SNR or THD+N specs at all as they are taken with audio-band limitation (20 kHz).<br /><br />For the rest I fully agree with you!Techlandhttps://www.blogger.com/profile/00511548486704836818noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-61250728823827287732018-10-21T04:45:30.972-07:002018-10-21T04:45:30.972-07:00I just knew beforehand that this would be conteste...I just knew beforehand that this would be contested... <br />And I'm impressed that you would know that I chose the wrong device without knowing what it is!<br />Anyway, I had it confirmed by RME's technical staff (in a lengthy discussion about many things other than only DSD conversion), because I couldn't believe it myself either. Yes, the AKM clearly outperforms the BB, as it Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-73492829255667986222018-10-17T01:08:33.613-07:002018-10-17T01:08:33.613-07:00You might have been fallen for the wrong device th...You might have been fallen for the wrong device then. The only block diagram in the AK5574 data sheet is only showing PCM mode. For example in DSD mode HPF (High Pass Filter) is disabled, because that would destroy the DSD signal. So at that point there is already a DSD signal present. I wouldn't wonder if the A to DSD conversion of the ADI-2 Pro outperforms your chosen BB chip by a margin. Techlandhttps://www.blogger.com/profile/00511548486704836818noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-36876479071070945472018-10-06T08:45:37.188-07:002018-10-06T08:45:37.188-07:00Stellar report, thank you! I almost bought the RME...Stellar report, thank you! I almost bought the RME for its DSD recording features, but after checking out the datasheet of the AKM A/D chip I decided against it. For 'native DSD' recording, it appears that the ADC first converts the analog signal to PCM (including decimation, naturally) before it goes about its business. I can't remember, though, at what point the signal is converted Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-45135779861561385782018-09-30T20:37:31.338-07:002018-09-30T20:37:31.338-07:00Thanks for the report, I enjoyed it.
As you mentio...Thanks for the report, I enjoyed it.<br />As you mentioned, it would be interesting to see how ADI-2 Pro behaves with a powerbank battery as a measuring device. Any plan to test it?Gianluca Jandellihttps://www.blogger.com/profile/01375599058756973487noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-37386398094614709592018-09-18T18:06:00.071-07:002018-09-18T18:06:00.071-07:00Yeah, that's exactly what I do Honza... The di...Yeah, that's exactly what I do Honza... The dithering for my vinyl stuff is the lightest and lowest amount of noise shaping that iZotope RX 6 offers.<br />Archimagohttps://www.blogger.com/profile/08642574001287787545noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-27714966694668738652018-09-17T10:09:13.426-07:002018-09-17T10:09:13.426-07:00Metric Halo has been using AKM ADC/DAC chips for m...Metric Halo has been using AKM ADC/DAC chips for many years. Their boxes are supposed to be a very good value. I hope they'll release new interface products soon with the latest AKM chips. Metric Halo boxes are upgradable, and great sounding mic preamps are optional. BJ Buchalter is a very competent designer. Would be a good comparison.Larryhttps://www.blogger.com/profile/00301882003865440092noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-27082467105206718702018-09-17T01:45:19.232-07:002018-09-17T01:45:19.232-07:00It is not about noise level of vinyl, but quantiza...It is not about noise level of vinyl, but quantization noise of the digital and necessity to dither. When you save 24/48 you needn't dither at all (or you can apply plain TPDF 24 bit dither but difference is at -140 dB). When you use 16 bit dither you should dither, preferably light noise shaping like modified-e-weighted. Also not a big deal or change, but bigger that at 24 bit.Honzahttps://www.blogger.com/profile/08793049319792036050noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-90267710080545502472018-09-15T11:48:39.345-07:002018-09-15T11:48:39.345-07:00Hey Honza,
Yeah, 24-bit vinyl rips sound great of ...Hey Honza,<br />Yeah, 24-bit vinyl rips sound great of course :-). Alas, I have not been able to convince myself that keeping those lower 8-bits have been necessary given the noise level in vinyl...Archimagohttps://www.blogger.com/profile/08642574001287787545noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-3377066064521016722018-09-13T14:51:58.454-07:002018-09-13T14:51:58.454-07:00Hi Nobody,
Yeah, I like how you think. This is ver...Hi Nobody,<br />Yeah, I like how you think. This is very true about the almost unspoken piece among audiophiles of just how important the ADC side of digital is to the quality of music. Spending >$100,000 on a top of the line sound system is meaningless if the music being experienced originated in a half-hearted production with sub-par ADCs and studio tools.<br /><br />From the consumer side, Archimagohttps://www.blogger.com/profile/08642574001287787545noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-30577682100338778422018-09-13T14:12:02.926-07:002018-09-13T14:12:02.926-07:00Thanks for answer Archimago. Well … my experiences...Thanks for answer Archimago. Well … my experiences from upsampling are pretty subjective, because I am not able to prove the differences reliably in ABX.<br />That said I would fully support not allowing any aliasing, therefore 100 percent stopband is highly recommended.<br /><br />Passband (cutoff) is as I wrote very, very debatable. My experience is: all the passbands 90-99 are good enough. Honzahttps://www.blogger.com/profile/08793049319792036050noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-81869759135058272252018-09-13T12:54:44.324-07:002018-09-13T12:54:44.324-07:00Hi Grof,
Interesting looking device. Beautiful in ...Hi Grof,<br />Interesting looking device. Beautiful in fact!<br /><br />While I'm sure the Pure 2 must have impeccable temporal resolution, I am not sure the noise level is as good as the RME device. The sample rate is also "limited" to 192kHz and no DSD for those who want to use it as a DSD DAC (I'm thinking more of the ADI-2 DAC consumer perhaps).<br /><br />Looking around theArchimagohttps://www.blogger.com/profile/08642574001287787545noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-51289126676965694452018-09-13T12:43:18.029-07:002018-09-13T12:43:18.029-07:00Hey Honza.
I've been fooling around recently w...Hey Honza.<br />I've been fooling around recently with 99% passband and 100% stop band in SoX to 192kHz. Just a little more CPU power. What do you think of that?!<br />Archimagohttps://www.blogger.com/profile/08642574001287787545noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-31716354782822711892018-09-12T03:52:56.188-07:002018-09-12T03:52:56.188-07:00Just for completists, also 92.8 cutoff sounds nice...Just for completists, also 92.8 cutoff sounds nice :-)Honzahttps://www.blogger.com/profile/08793049319792036050noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-11694095066578272982018-09-12T02:33:58.644-07:002018-09-12T02:33:58.644-07:00Upsampling by software has usually bigger potentia...Upsampling by software has usually bigger potential, since we can supress aliasing and set the cutoff. Also double precision filters can be used. The question for 44.1 kHz is where the cutoff frequency should be. I used 95.2, 97.8, 92 and 93 (with ferocious resampler, with Sox it is similar but not the same since the parameters in ferocious resampler represent some slight level of attenutation atHonzahttps://www.blogger.com/profile/08793049319792036050noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-24663677863063135392018-09-11T06:14:20.386-07:002018-09-11T06:14:20.386-07:00Would be interesting to see results when compared ...Would be interesting to see results when compared with Antelope's Pure 2, it's a easy win when your competitors are 3 class under...Grofhttps://www.blogger.com/profile/05689571088523300757noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-33394006127463083522018-09-10T11:05:00.937-07:002018-09-10T11:05:00.937-07:00It’s so easy to change/upgrade DACs today, but “pe...It’s so easy to change/upgrade DACs today, but “perfect” ADCs will stay with us “perfect forewer” in recordings we love. My point, that measuring couple popular historical ADCs from the last 30 years could tell us more about music reproduction qualities than measuring newlly issued DACs.<br />Your systematic and consistent aprouch is so rare in this hobby, I just trying to propose more Nobodyhttps://www.blogger.com/profile/12460485564715238239noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-39985764704277760382018-09-10T08:38:22.761-07:002018-09-10T08:38:22.761-07:00Isn't that obvious? Source materal is in 44.1....Isn't that obvious? Source materal is in 44.1. Why upsample that to 48? Does more damage than good at that ratio.Techlandhttps://www.blogger.com/profile/00511548486704836818noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-61527798265972387342018-09-10T08:26:30.145-07:002018-09-10T08:26:30.145-07:00I did the same thing as an experiment: I'm tot...I did the same thing as an experiment: I'm totally unable to distinguish among 24/96 and 16/48 (for sure I'm deaf:)).<br />Apart that what I don't understand why streaming providers (e.g. Tidal and Qobuz) don't offer 16/48 instead of 16/44.1. Marketing reasons?Teodoro Marinuccihttps://www.blogger.com/profile/02293771086675156578noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-26943399342515726932018-09-10T04:51:07.787-07:002018-09-10T04:51:07.787-07:00Yes :-)
I would downsample those rips to 24/48 wit...Yes :-)<br />I would downsample those rips to 24/48 without dithering, though ;-)Honzahttps://www.blogger.com/profile/08793049319792036050noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-13168675093424577542018-09-09T23:42:20.314-07:002018-09-09T23:42:20.314-07:00@Techland: Thank you very much for the link to the...@Techland: Thank you very much for the link to the test of this device in the Studio Magazin. Looks good.<br /><br />@Archi: Please have a look at the phase behavior in NOS mode (that we have discussed some time ago).JR_Audiohttps://www.blogger.com/profile/00547557948411188806noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-44792535333591881412018-09-09T20:49:03.936-07:002018-09-09T20:49:03.936-07:00BTW: Good point about the distortion vs. amplitude...BTW: Good point about the distortion vs. amplitude. Will look around to see what I can find!<br />Archimagohttps://www.blogger.com/profile/08642574001287787545noreply@blogger.comtag:blogger.com,1999:blog-4781727111866727703.post-64420568965602391962018-09-09T20:33:53.972-07:002018-09-09T20:33:53.972-07:00Indeed Honza,
I really don't think there's...Indeed Honza,<br />I really don't think there's any debate in this regard <em>at all</em>. Certainly ain't the 80's anymore with 8-bit digitized audio or even early 16-bit ADC/DACs :-).<br /><br />Having said this, of course some analogue/LP's sound fantastic. Certain vinyl masterings sound better than the digital release... For those, I happily rip from vinyl in 24/96 and Archimagohttps://www.blogger.com/profile/08642574001287787545noreply@blogger.com