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ReClock 1.8.6.0

Audio device :p is ATH-AD900 [..]
I have read that leeperry is using 192kHz over 96kHz, but the thing is that I have a Realtek ALC262 integrated audio in my laptop, which is certainly not the same level of hardware that I believe leeperry is using. ^^;

I have also read that older Realtek audio chipsets internally resample to 48kHz, but not sure if that is accurate with the newer chipsets. What setting for sampling rate would probably be the best?
the realtek is really killing your headphones potential...if you have a desktop PC around, I'd advise getting something like this(don't pay attention to the "POS" name :D): http://cgi.ebay.com/AUDIOTRAK-MAYA-5-1-MK-II-POS-Sound-Card-5-1-Channel_W0QQitemZ110482339777

proper NJM4580V op-amps, beefy headphones out, 2 discrete clocks for low jitter, very stable drivers that support 16/24/32bit and forbid resampling, WASAPI/KS support, 5.1 if you ever need it, 2 layers PCB...I think it's a steal for that price, you would not regret it!

the best theoritical sample rate is 96kHz from my distortion tests, but my fav is 192kHz with SRC so far...I just love how it sounds! OTOH, I currently keep my music 100% lossless as I don't want it to be colored as much as movies.

and about the random pops I'm getting, I think it's related to the 24bit/24bit padded options :eek:

not saying the code is at fault! but both the VIA/ESI drivers give them...I get slight distortion in silences and random pops...maybe it's just the card that doesn't like 24bit :disagree:
 
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Wow, thanks, that was a really fast response..

Unfortunately I don't have a desktop computer anymore. Perhaps there might be something similar in USB or ExpressCard form, so I'll probably have a search around.

the realtek is really killing your headphones potential.
Yeah, I was going to get the ATH-AD700, but I didn't like the look. :p
 
Perhaps there might be something similar in USB or ExpressCard form, so I'll probably have a search around.
There is the RME Fireface UC, but probably that's overkill for your needs and for how much you want to spend on it...:D
 
There is the RME Fireface UC, but probably that's overkill for your needs and for how much you want to spend on it...:D
lol in that case my wallet and headphones would be the bottleneck

actually wait.. the RME Fireface UC costs more than my laptop and headphones combined :D :D
 
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Cool, I have sent them an email regarding power converters and postage. XD

Just curious, a bit off topic really, but that DAC/amp has a volume control and my laptop also has volume control, so how would be best to set those?
Should I have my laptop on a low-ish volume and control with the box, or laptop medium/high volume?
 
Cool, I have sent them an email regarding power converters and postage. XD

Just curious, a bit off topic really, but that DAC/amp has a volume control and my laptop also has volume control, so how would be best to set those?
Should I have my laptop on a low-ish volume and control with the box, or laptop medium/high volume?
the chinese ebay seller is cheaper and will ship a 110/230V wall wart on request I think.

this is a USB DAC, not a soundcard...there's no windows mixing board, it will output 100% bit-perfect(through KS/WASAPI only) and all you'll have is the analog volume pot on the amp itself.

it prolly won't be very accurate, though...a good ALPS volume potentiometer costs the price of the unit...but put a LT1364, use WASAPI and you won't regret it ;)
 
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Just provide you with some run of the gun performance numbers for Atom based (dual core) system while reclocking mostly some jazzy tunes, for a comparison/future development purposes..

--
Atom ION 330 (two physical cores, two virtual), onboard audio Realtek ALC662/Dsound render
WinXPSP3, MPC-HC (using its native FLAC and mp3 decoder in IEEE float), ReClock 1.8.6.0. + resampler 1.0.0.2 (MT edition)
---
mp3 stream:
128Kbps - 192KBps radio
Reclock @ 96kHz (Good Sinc Interpolation) ~60% CPU
Reclock @ 192kHz (Good Sinc Interpolation) ~95% CPU
both silky smooth but anything above setting "Good Inter." SQ stutters as hell..
---
mp3 local:
192Kbps - 256KBps
Reclock @ 96kHz (Good Sinc Interpolation) ~45% CPU
Reclock @ 192kHz (Good Sinc Interpolation) ~85% CPU
both silky smooth but anything above setting "Good Inter." SQ stutters as hell..
---
FLAC local:
1411 KBps output was "playable" at Good Sinc settings as the max, CPU was <90% @ 192kHz and <50% 96kHz, BUT with occasional brief stutter or crack, Audio clock shows 104ms samp. Sorry don't have extensive FLAC library at hand (perhaps 1411 KBps is too much) with this PC now, new Czech Radio recordings of complete six Bach's Brandenburg Concertos, downloaded free FLACs here (scroll down): http://www.rozhlas.cz/d-dur/download_eng
---

=> I´m kind of surprised that those two top SQ settings are in practice unavailable for this system (for mp3), but this is really no big number cruncher platform to star with in terms of its CPU ~1.6GHz.

However, Atoms feature powefull video chip, Atoms are quite popular home cinema platforms, perhaps future resampler version using CUDA could give us that "Best Sinc" at least in 96kHz. Shall we contact the CUDA guys on their forum, they are quite responsive, to look at it with James as to whether is it feasible project at all? Thanks
 
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BTW, that'd be great if we could choose the output sample rate depending on the application filename...so one could go 96/192kHz for movies and bit-perfect for music, easily in 2 clicks :eek:

or possibly only oversample MKV/M2TS, and keep AVI/MPG low quality(both carry ugly audio to begin w/).

I've made some automatic batch files using "chp.exe" that apply reg files silently...but they hiccup on .m3u playlists :doh:
 
BTW, that'd be great if we could choose the output sample rate depending on the application filename...
James, if you decide one day to create a "Hall of whining", guess who will be the 1st? :D

@leeperry: I'm just kidding...;)

Another thing: reclock's about dialog still refers the resampler to be SRC, maybe it would be a good idea to change it too...
 
I'm just kidding...;)

Another thing: reclock's about dialog still refers the resampler to be SRC, maybe it would be a good idea to change it too...
well, we get tons of new features these days...it's now time to put them to good use :D

I'd love to have MPG/AVI and audio "same as input"(saves CPU load and electricity bill) and MKV/M2TS/WMV in "192kHz"(to improve the resampling accuracy) :agree:

mplayerc-audio.exe / KMP-lofi.exe / KMP-hifi.exe.....anyway, I'm just suggesting (hopefully useful) feature requests..nothing more!

I think a new rls w/ the new MT resampler would be in good order.
 
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indeed CUDA audio starts to come a long way...reverb, convolver, EQ:
http://www.nilsschneider.de/cms/index.php?option=com_content&task=view&id=29&Itemid=26
http://www.liquidsonics.com/software.htm

would be nice to have the GPU working on h264 decoding, 3D lut color correction and audio resampling altogether 8)

Thanks for your support 8)


Btw. your linked french webshop with imported chinese DACs seems a bit expensive, more importantely I'm afraid these Chinese DACs are not there yet in terms of production quality. I guess the best value currently is from the Korean manuf. called Jineung, they are the true designers/manufs for ESI's Dr. DAC product line. And the specs&prices are gorgeous: 150-300k of their currency, which is 100-200Euro (plus shipping, customs, taxes, but that could be creatively trimmed down).
http://www.jineung.co.kr/

For instance, their oldest model UHF-1 TranspoDAC goes for ~100Euro! It's 24bit/96kHz Bit Perfect DNR: 123dB
http://www.jineung.co.kr/gnuboard4.utf8/bbs/board.php?bo_table=new_product&wr_id=5

But the true killers are their high end models, DAC-1, DAC-2, UDT-1, which are rebranded by ESI (Dr. DAC) and perhaps others..
 
the true killers are their high end models, DAC-1, DAC-2, UDT-1,
which are rebranded by ESI (Dr. DAC) and perhaps others..
ouuuh nice, lemme see!

well AudioTrak used to be owned by ESI...then Gyrocom bought it.

and this product: http://www.dbsys.de/webshop/product_info.php?products_id=257&language=en

became this: http://www.esi-audio.com/products/drdacprime/

and this: http://www.audiotrack.net/products/DRDAC2DX/

ESI drivers are better, but Audiotrak seems to use better components.

what's a good source for JAVS DAC's shipped to Europe?
 
ouuuh nice, lemme see!

what's a good source for JAVS DAC's shipped to Europe?

Still investigating, ...
For starters, there is list of Korean webshops at the right bottom of JAVs corp. website, link I provided earlier. I doubt, that everyone will be keen on shipping to EU, but some might be ready to work with us.

There might be even some ebay.co.kr type of outlet, I don't know yet..

And as always, the trick of last resort is to "persuade" some ordinary Korean low-mid level business contact of yours,
who travels there and back regularly on EU inbound flight, forwarding the parcel overhere.

edit: one webshop as reference price point, here kitty:
http://www.decacom.co.kr/
http://myworld.ebay.com.sg/gyrocom/
(they've listed 96kHz DAC called AUDIOTRAK Prodigy CUBE, similar to UHF-1 (but diff. components), for ~$130)
 
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SRC claims on their site and here in blog with graphs:
http://www.mega-nerd.com/erikd/Blog/CodeHacking/SecretRabbitCode/progress.html

SRC is capable of arbitrary and time varying conversions ; from downsampling by a factor of 256 to upsampling by the same factor. Arbitrary in this case means that the ratio of input and output sample rates can be an irrational number. The conversion ratio can also vary with time for speeding up and slowing down effects.

SRC provides a small set of converters to allow quality to be traded off against computation cost. The current best converter provides a signal-to-noise ratio of 145dB with -3dB passband extending from DC to 96% of the theoretical best bandwidth for a given pair of input and output sample rates.

That's insane number, is that currently achieved via "Best Sinc Interpolator" setting in that SRC LeePerry Edition Plugin using /libsa/ or MT plugin edition 1.0.0.2 using /libre/ for this Reclock b.60 as seen #page1,8? Or this is just unrestricted cpu potential not meant for current consumer gen of sillicon mortals?
 
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That's insane number, is that currently achieved via "Best Sinc Interpolator" setting in that SRC LeePerry Edition Plugin using /libsa/
Yes, that's what you get when using libsamplerate resampler in "Best Sinc" mode, or the "Excellent" when using reclock versions prior to 1.8.6.0.
 
yeah, the SRC author likes to boast about SNR...but not much about THD/THD+N? which is essentially just as -if not more- important IMHO.
 
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