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In Reply to: RE: Another driver problem? Operator choosing the wrong driver? posted by AbeCollins on September 26, 2015 at 08:14:38
There's a big difference between driver error and operator error in this case. According to fmak's post, the driver that came with his problem DAC did not allow for setting buffer sizes and was configured in such a way that the buffer size was too small. This is a driver problem, and can not reasonably be blamed on the "operator", who merely installed the appropriate driver for the device. (Presumably it was a case of "plug and doesn't play".)
If the driver came with a control panel allowing the buffer size to be manually set and fmak had set it too small and then complained, then it would have been operator error.
If there had been a control panel with a buffer size parameter and a default value that was too low, then perhaps there could be a reasonable debate about "operator error" vs. "driver error". Not in this case, assuming fmak's description is correct.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Follow Ups:
who know about XMOS usb audio drivers will know that they require licensees to customise the drivers. Recently, user settings of the excellent XMOS CPL have been disabled and vendors set buffers to whatever they see fit. I have been lucky in having a recent driver that contains both a fully functional CPL and USB Spy functions. Hence I could increase usb buffer size.
I should be noted that some vendors of well known XMOS dacs still use the 1.6x drivers for Windows, when the much better 2.3x and 2.6x drivers are available. I don't know how the driverless MAC version works but I would guess that the XMOS CPLs would not be there.
I lament the kind of blind postings that a few inmates make here that prevent sensible discussion.
I get your point 100% Tony. But the fact is, he didn't have a problem with the Jitterbug did he? A product which he was quick to implicate in his alarmist subject title and in the body of his original post.
Only later did we learn that it wasn't a Jitterbug issue at all but his setup.... after he revealed what he had done. After I had posted my findings that the Jitterbug worked perfectly fine with my two XMOS DACs. And after others chimed in that it worked fine with their XMOS DACs. Perhaps this prompted him to go back and double check his setup.
Bottom line: there was nothing wrong with his Jitterbug after all, contrary to his alarmist original post.
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Jitterbug does not work on XMOS DAC [Sept 23, 2015]:
Continuing my exploration of the effect of the Jitterbug, I inserted it on the same PC system with the same usb port but connected it to an XMOS AK4559 dac which previously sounded good on its own and found:
that the system now sounded a lot worse, with over provision of bass and a much thinner mid high than what I have been used to.
Clearly the Jitterbug doesn't work with every PC/DAC combination. Not only that, but the sound output is now susceptible to low volume clicks when I move the mouse while surfing.
The system w/o Jitterbug sounds good and is w/o clicks..
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Audioquest recognises that the Jitterbug may bot work well with some computers and offers a refund mechanism. My same PC works extremely well with a TEAC and a Wyred dac that don't use XMOS chips.
Since you say that you work in the computer industry, it is time that you understand issues of incompatibility and stop making things up.
I think its time that you do more testing of your setup before jumping the gun implicating a benign product with alarmist posts. A product that others in this forum have had no problems with so far, me included.Yes, you eventually back peddled and tested your setup more thoroughly to discover that there was nothing wrong with the Jitterbug on your XMOS DAC after all. Thank you.
Edits: 09/27/15 09/27/15
you are very good at it. May be you feel lonely working at home?Stick to contributing to improving audio. But it is clear that you have no understanding of the way that XMOS drivers work and yet profess to claim 'expertise'.
Edits: 09/27/15
No sense in belaboring the point when your post is right there in B&W, linked below. I didn't make it up. Good day.
Edits: 09/27/15
serious problem of comprehension of what is written.
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