Are the "counter-measures" correctly reinstated following a bit perfect test?
MDAC first listen (part VII)
- Thread starter ridney
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Are the "counter-measures" correctly reinstated following a bit perfect test?
That's a good question. It didn't corrrect itself when I started playing music again. I just power cycled the MDAC at the time
It was me and some others who suggested the option to invert phase. Thanks for fulfilling the wishes of us with ears sensitive to absolute phase
. Remains to be proven though.I only have MAC computers so currently go on with the factory version of firmware.
It really sound different on 0.99 compare to 0.90. But you need to do factory reset after update the firmware.
it sound thicker, more body, more defination in the lower base as well. Vocal are not as forward, airier and sweater high. I like it.
John, I am ready and side aside some saving for your mamp and mpax and bdac and ... what else... lolz?
Mav
it sound thicker, more body, more defination in the lower base as well. Vocal are not as forward, airier and sweater high. I like it.
John, I am ready and side aside some saving for your mamp and mpax and bdac and ... what else... lolz?
Mav
Richard Kimber
pfm Member
I found that mine stopped when I switched off and then (later) on again. I didn't need to restore the defaults.
Edit: And, BTW, I've never done the bit perfect test - using Linux.
JohnW
pfm member
Mav - Did you update straight from 0.90 to 0.99?
If so that might explain why your MDAC did not automatically reset - I recall an early version of software did not handle the Reset - although it might have been even earlier then 0.90...
Also, don't forget that the selected Digital filters might not have loaded correctly with 0.90....
sorry about that one...
JohnW
pfm member
Could be one of two issues.
1. We have not re-enabled the "counter-measures" after the BPT.
2. During the BPT, the "counter-measures" are disabled and the ESS has misslocked - and once its got its knickers in a twist it will stay that why until we force it to re-lock...
I suspect the second option - so we basically have to force a re-lock event after the BPT - the software is full of stupid workarounds trying to make the ESS behave in a semi-orderly fashion.
ESS should really sort there house out... and should have RESPUN THE SILICON a long time ago!
John
JohnW
pfm member
Hi Richard,
The BPT is just a WAV file - so you can still use it under Linux (I guess once you have created it from the Java applet...)
John
sq225917
Bit of this, bit of that
Quarter of a million dollars just to fix a bug that most designers are willing to workaround. How do you rate the chances?
sam_cat
C'est Crounchifique!
Fixed that for you... ;-)
JohnW
pfm member
ESS make about US$50K from our projects alone every month (just based on our Qtys of the 9018).
I can understand that - then at least they should not promote features that don't work correctly.
The second point is that some bugs cannot be 100% worked around... We have to perform off board processing to "Hopefully" resolve the left channel crackling... we are lucky to have this off board processing power, other designs would be stuck...
John
misterdog
Not the canine kind
Well I could wait no longer for an MPAX so bought a Behringer UCA 222.
Project X pack>TR. Dino phono amp>Behringer UCA>Audacity(WinXP).
(The Behringer has SPdif optical out)
>MDAC>Yamaha AS2000>CelestionA3.
So Vinyl into the Digital domain sounds surprisingly good.
(Just waiting for the organic caps in the Behringer to burn in)
£ 20 on fleabay!, If you want to try it buy the UCA 202 and download Audacity.
Fairly plug and playish too (lucky for me).
Project X pack>TR. Dino phono amp>Behringer UCA>Audacity(WinXP).
(The Behringer has SPdif optical out)
>MDAC>Yamaha AS2000>CelestionA3.
So Vinyl into the Digital domain
sounds surprisingly good.(Just waiting for the organic caps in the Behringer to burn in
)£ 20 on fleabay!, If you want to try it buy the UCA 202 and download Audacity.
Fairly plug and playish too (lucky for me).
They seem to be ready to live with the risk. It is quite widely used chip, two of them inside same popular Oppo players for instance. Quite a risk if issues begin to escalate.
John, yes it's straight update from 0.90 and I only use USB so the filter thing don't affect me.
Now I like even more optimum spectrum filter as the full bodied sound compliment the dynamic sounding of it. I also have to move away my speaker little more from rear wall to clearer some "air" from the woofer.
Mav
Now I like even more optimum spectrum filter as the full bodied sound compliment the dynamic sounding of it. I also have to move away my speaker little more from rear wall to clearer some "air" from the woofer.
Mav
Mav - Did you update straight from 0.90 to 0.99?
If so that might explain why your MDAC did not automatically reset - I recall an early version of software did not handle the Reset - although it might have been even earlier then 0.90...
Also, don't forget that the selected Digital filters might not have loaded correctly with 0.90....
Thanks for the feedback - indeed, when in Bitperfect Test, the DSP runs a completely different workload and the ESS crackle countermeasures were not applied there. As always, once the crackle sets in, it will only disappear upon re-lock ie. change of input etc. No need for power cycle, no need for factory defaults. It has nothing to do with the M-DAC itself, it's just the ESS input decoder missing a beat. I've put the countermeasures into the Bitperfect Test code already, expect it fixed starting from the next build.
sq225917
Bit of this, bit of that
I'd guess that until everyone stops buying them that they won't choose to fix it. You are tacitly accepting the fault as being ok by continuing to pay for the chips. Whatever else designers and engineers like yourself might communicate to them, your decision to continue to use the chip is what counts.
Great. Thanks Dominik. I suspected I had found an "edge case" here, but its still good to tidy them if you can
delange
pfm Member
I've owned an NSLU2 for about 2 days, many years ago. I was so disappointed by the performance that I sold it on eBay. I have no idea how it performs with LMS on it but there is some documentation available in the Slimdevices Wiki on how to install it on a NSLU2. You might give it a try: http://wiki.slimdevices.com/index.php/Category:Installation_Guide_Pages
delange
pfm Member
I am one of the owners of an SBT / M-DAC combo but I have never compared the SBT internal DAC with the M-DAC. Ive been using an external DAC since I bought the SB3 (back in 2005). The SBT has replaced the SB3 in my main listening room about 6 months ago and since I already was using an external DAC I never took the trouble to compare the internal DAC with the external DAC. For sure the M-DAC will sound miles apart from the internal SBT DAC due to the difference in technology (DAC chip), the analogue stage and the power supply designs of both systems.
The Squeezebox is a great streamer; the M-DAC is a great DAC. The combination is best of both worlds I would say.
delange
pfm Member
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