tag:blogger.com,1999:blog-6890046273025265768.post7326179065496914432..comments2024-03-18T03:10:30.572-07:00Comments on NwAvGuy: Testing MethodsNwAvGuyhttp://www.blogger.com/profile/00309644608738074125noreply@blogger.comBlogger18125tag:blogger.com,1999:blog-6890046273025265768.post-4673947853346104542012-08-17T10:57:44.088-07:002012-08-17T10:57:44.088-07:00Thanks for the Keithley tip. The UPV is a solid an...Thanks for the Keithley tip. The UPV is a solid analyzer for what it does. But it's rather "old school" in that it can't leverage the power of a PC to nearly the same extent as an Audio Precision or dScope III. Considering the UPV is around the same price as the dScope and 5xx series APs it's not really a viable competitor.NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-84505344577842730792012-08-15T11:32:16.682-07:002012-08-15T11:32:16.682-07:00Another interesting option to consider is the Keit...Another interesting option to consider is the Keithley 2015/6 -P series of 6½-Digit Audio Analyzing Multimeters not exactly cheap but more option than the good old Agilent 344xx models.<br />Also what are you thoughts on the Rohde & Schwarz UPV<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-26867545229114266282012-05-06T08:21:04.091-07:002012-05-06T08:21:04.091-07:00At the end of the RMAA article I have several sugg...At the end of the RMAA article I have several suggestions for how to get the most out of it for not a lot of money. My main issue with RMAA is when people publish RMAA results that are often wrong and misleading. Bad published measurements are worse than no published measurements. AMB for example published bad RMAA data for their headphone amps and that erroneous data was used by many to help NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-64541640692239796862012-05-05T10:39:07.058-07:002012-05-05T10:39:07.058-07:00I can see your point that proper measurement gear ...I can see your point that proper measurement gear is expensive, but I still feel like there may have been one essential question here that has not been answered yet. Is there anything we can properly measure without spending much more than say $100-$200? Like you said yourself, most of us (blog readers) are not really designing DACs or amps, but are mostly just interested in how well certain Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-14244733094435187842011-12-21T17:59:36.312-08:002011-12-21T17:59:36.312-08:00@Jonathan, I haven't used ARTA but it's my...@Jonathan, I haven't used ARTA but it's my understanding it's best suited for acoustic measurements (i.e. speakers, rooms, etc.). I don't think it does any (or at least not many) swept sine measurements. It's mostly based on frequency band (i.e. 1/3 octave) analysis, multi-tone, impulse response, pink noise, etc. All of those are very useful for acoustic work but not NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-10332043624511851642011-12-21T14:22:43.785-08:002011-12-21T14:22:43.785-08:00Hi,
Have you looked at the ARTA tool at all? Whil...Hi,<br /><br />Have you looked at the ARTA tool at all? Whilst it isn't free it is within the realms of a hobbyist. It does of course need a decent interface to get good results:<br /><br />http://www.fesb.hr/~mateljan/arta/<br /><br />JonathanJonathanhttps://www.blogger.com/profile/10964612518135103561noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-65318569621312902122011-10-09T11:04:50.242-07:002011-10-09T11:04:50.242-07:00@Thanh, Thanks. I have not tested or used any of t...@Thanh, Thanks. I have not tested or used any of the Prism D/A or A/D products. They do have a good reputation much like Apogee, RME, etc.NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-19513507416304329682011-10-08T21:30:35.700-07:002011-10-08T21:30:35.700-07:00Hi,
I am been reading all your articles for the l...Hi,<br /><br />I am been reading all your articles for the last week and it is both refreshing and informative.<br /><br />Can I ask, have you used any of the Prism DA or AD converters?<br /><br />regards,Thanhnoreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-34947212176260395982011-09-15T11:55:02.683-07:002011-09-15T11:55:02.683-07:00Cheap USB scopes are not much good for audio testi...Cheap USB scopes are not much good for audio testing. They can display a square wave and show sine wave clipping but that's about it.NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-8770202842933239672011-09-15T11:51:48.215-07:002011-09-15T11:51:48.215-07:00I have access to one of these, would it be useful ...I have access to one of these, would it be useful for audio measurements in anyway? <br /><br />http://www.easysync-ltd.com/product/520/ds1m12.html<br />http://www.easysync-ltd.com/product/523/hp-3060.htmlUnknownhttps://www.blogger.com/profile/01568166264347721360noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-12079954013870686112011-09-11T07:10:30.689-07:002011-09-11T07:10:30.689-07:00Anon, see my DAC Challenge articles. What you did ...Anon, see my DAC Challenge articles. What you did is similar to what I did with DACs. I wouldn't say the E5 doesn't cause any degradation but it's likely small enough it doesn't matter and could be considered inaudible in your situation.NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-80106768370577194502011-09-11T02:33:25.822-07:002011-09-11T02:33:25.822-07:00Hello!
I took some high quality record and pass i...Hello!<br /><br />I took some high quality record and pass it through SOUNDCARD OUTPUT > FiiO E5 + Headphones (they connected parallel) > SOUNDCARD INPUT. I give both records (original and passed through the amp + headphones) to some people with good gear. And none of them hear the difference! Do it mean that FiiO E5 does not make the audible quality degradation when work with this Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-78683013281437288332011-08-10T10:13:09.092-07:002011-08-10T10:13:09.092-07:00I think its around $6k. I don't think it has d...I think its around $6k. I don't think it has digital I/O either...so not any good for dacs and that kind of thing.Nyal Mellorhttp://www.acousticfrontiers.comnoreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-60877186923035455202011-08-10T10:00:33.721-07:002011-08-10T10:00:33.721-07:00I wasn't aware of the Flexus. The analog specs...I wasn't aware of the Flexus. The analog specs look to be similar to the dScope and low-end AP units. Unless I'm missing something it lacks digital I/O which is a big deal for testing DACs.<br /><br />I would be interested to know what the price is. I'd be very surprised if it's much less than the entry-level AP and dScope (i.e. it's probably around $5000).NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-50406909645644670562011-08-10T09:12:28.197-07:002011-08-10T09:12:28.197-07:00Thanks for your reply. Looks like AP is the way to...Thanks for your reply. Looks like AP is the way to go then. I saw that NTI have also just released a tester - the Flexus - did you see that and if so what were your thoughts on it and how it compared to the AP and dScope?Nyal Mellorhttp://www.acousticfrontiers.comnoreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-2721184577775602572011-08-09T10:18:40.151-07:002011-08-09T10:18:40.151-07:00Nyal, sorry but there's really not much betwee...Nyal, sorry but there's really not much between the free, unsupported for several years, limited, and very buggy RMAA, and a real audio analyzer like an Audio Precision or dScope.<br /><br />It's a small market, so companies can't mass produce audio analyzers in China. The dScope is made in the UK and AP analyzers are made in in the USA. Both are low volume specialty products. Both NwAvGuyhttps://www.blogger.com/profile/00309644608738074125noreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-81548614233604885982011-08-09T10:08:39.720-07:002011-08-09T10:08:39.720-07:00A great article!
I am slightly surprised there ar...A great article!<br /><br />I am slightly surprised there are no lower cost audio analyzers out there than the AP and PS units. $6,000 entry is expensive! If you were not doing extensive R&D work but wanted more to verify electronics function of already built commercial units then would there be any other suitable alternatives?Nyalhttp://www.acousticfrontiers.comnoreply@blogger.comtag:blogger.com,1999:blog-6890046273025265768.post-14765516220040241402011-05-14T02:23:26.793-07:002011-05-14T02:23:26.793-07:00I just happened across this. Bravo! The amateur RM...I just happened across this. Bravo! The amateur RMAA tests seen often in the PC hardware world drive me nuts.<br /><br />Robheycarnuthttps://www.blogger.com/profile/02046373294198981949noreply@blogger.com