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Post by Deleted on Oct 23, 2012 19:30:28 GMT
Exactly my next move! Yep, that did it alright, no noise at all.
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Post by Deleted on Oct 23, 2012 19:59:58 GMT
That is another thing I don't like about laptops...
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XTRProf
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Post by XTRProf on Oct 23, 2012 22:46:38 GMT
No 66 is is about to come home... Gulp, 66 is ------->
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XTRProf
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Post by XTRProf on Oct 23, 2012 23:09:19 GMT
I have to say the SQ, by memory, is already better than the super PSU'd ebay jobby, so that hope is already fulfilled. If it reacts well to the same treatment we'll be on fire. In picture, what PS u using for the PK dac? Sorry, what super power from ebay? Better than a super regulator?
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XTRProf
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Post by XTRProf on Oct 23, 2012 23:28:30 GMT
I got no noise whatsoever on mine and I tested it as exposed to RF/EMI as yours. Maybe noise from the laptop is getting through. I had the same problem this summer with my laptop both plugged and running on battery and the Musiland 02 USB DAC, and the Musiland is in a proper case. I'd suggest you try it with the Atom (or any other non latptop) and see if it happens too. Sorry, I thought it's all in digital until after the dac I/V stage? Digital advantage is noise don't bother the signal when properly processed. So digital processing problem there?
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Post by Deleted on Oct 24, 2012 6:39:27 GMT
Hi Chong, Sorry, my colloquial English causing confusion there. The PSU for the pk is regulated 3.3 with jlh x2. No super eBay, just another 3.3 jlh on an eBay usb-i2s board.
As for the noise it was system/fan noise breaking through, on my little netbook I get it on mp3 too!
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Post by Deleted on Oct 24, 2012 18:32:24 GMT
For an unkown reason the local clock of my PK has decided to stop working so I've been forced to run the DAC in sync mode getting the clock from the Amanero's MCLK pin. I've been listening the whole evening in this way and TBH it sounds fabulous. It takes ome time for the clocks on the Amanero board to warm up and stabilize and give their lowest jitter/phase noise but once they do, boy does it sound good! I'd say as good as the Xonar ST's analogue out if not better.
CJ has been very generous and sent me a USB cable with the Vbus disconnected and I was wondering whether it could be used to get rid of USB power and feed the Amanero board with Will's reg +JLH combo I used to power the PK's clock with (3.3V). I'd connect it to the power pins available at the back of the board (pin header area). As Alex said it could cause problems with the stock onboard regulator I rather not do anything until I know it is safe.
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Post by Deleted on Oct 24, 2012 20:18:14 GMT
Hi Javier Another option to try, could be to replace the missing incoming +5V Vbus with 4 x NiMh batteries, Regards Alex
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Post by Deleted on Oct 24, 2012 20:33:51 GMT
emmm.... sorry I 'm not sure I understand. Do you mean that I use batteries to power the board instead of a plugged PS?
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Post by Deleted on Oct 24, 2012 21:46:10 GMT
emmm.... sorry I 'm not sure I understand. Do you mean that I use batteries to power the board instead of a plugged PS? Hi Javier The NiMhs would simply provide the power that the Vbus provided originally until you get a separate +5V JLH supply working. Better still, ignore me for now, as I have a stuffed up head due to a virus, and haven't had a coffee yet either. Regards Alex
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XTRProf
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Post by XTRProf on Oct 24, 2012 22:51:43 GMT
Another option to try, could be to replace the missing incoming +5V Vbus with 4 x NiMh batteries, LFP (soorry ......, might have got the abbreviation wrong) will be better.
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XTRProf
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Post by XTRProf on Oct 24, 2012 22:55:28 GMT
Just to have an idea, the Amanero clock giving what jitter? The PK clock jitter too.
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Post by Deleted on Oct 25, 2012 7:39:33 GMT
Just to have an idea, the Amanero clock giving what jitter? The PK clock jitter too. No idea about the clock on the PK. The Amanero clocks: -78dBc @10 Hz, -115dBc @100hz -140dBc @1khz -150dBc @10khz -155dBc @100khz -156dBc @1mhz
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Post by gommer on Oct 25, 2012 14:45:10 GMT
I'm late, but I've finally joined the club, #167 on the list.
I still have high expectations of my DDDAC. This DAC uses 16 paralleled TDA1543's. The few times it has played (before i blew all it's elco's by accidental reverse polarity), it sounded wonderful. But the kit uses an old fashioned receiver chip (forgot which one) that is limited to 44.1 / 48 kHz (albeit it's fed with a very low jitter TENT clock. OTOH this receiver is synchronous with jitter reduction circuitry that benefits from the TENT clock. I've bought this Amanero in order to try higher word frequencies on the TDA1543, it accepts up to 192 kHz.
Since i'm here it's a good occasion to ask: I'm not sure yet if i'm going to use battery power or a good power supply with ripple eater, as most of you guys do. Where can one obtain a JLH ripple eater these days?
Cheers, Marc
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Post by Deleted on Oct 25, 2012 15:26:08 GMT
Welcome to the club Marc!!! I'm really enjoying my Amanero and I haven't even started to tweak it. I've bought this Amanero in order to try higher word frequencies on the TDA1543, it accepts up to 192 kHz. BTW, isn't the TDA1543 limited to 16bit? if so you'll have to dither down most Hi Res material from 24 to 16.
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Post by gommer on Oct 25, 2012 15:33:55 GMT
Yup, it's a 16 bit DAC indeed, in reality even less. One chip achieves about 12 bit and 16 chips about 14,5 effective bit resolution. Can't 24 bit material just be truncated to 16 bit for ease and low processing power? You should hear this 'low resolution' DAC, it's (was )incredibly detailed. Sound quality is a very strange thing and our perceiving must depend on countless things that we don't understand yet, i think. You should also read my Aune T1 review when it will be online in a few days. There are also some strange observations that i can't even begin to explain. Cheers, Marc
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Post by Deleted on Oct 25, 2012 15:52:01 GMT
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Post by gommer on Oct 25, 2012 15:59:28 GMT
Nah, Win7, foobar2k and WASAPI here, and also a Linux ALSA + MPD install waiting for the DAC. But it's as I thought, no dither needed since even 16 bit is more than the DAC can handle in reality. Do you believe dithering brings sonic improvements over truncating?
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Post by Deleted on Oct 29, 2012 11:41:31 GMT
Hi All Concrete slab is now finished (6 tons of the stuff) and now the 12m x 8.5m greenhouse to erect before the weather gets tooo bad. And then the path laying can start. Knocked back on planning permission for the house Extension build so back to the drawing board with that. So whilst waiting for my arms to un-stretch back to their normal length I had a play with my Amanero USB/i2s board. Mmmm interesting. I have mine hooked up using just the 5V Vbus so no fancy add on PSU errr yet. Most of you will know my (Alex’s ) system so no need to go into that part to deeply. I’ve been using Fubar or Jriver with and without Jplay or Slacko puppy (Linux) with no issues from the Amanero Drivers which seem to be rock solid with no drop outs what so ever. So all good on that front. I’ve connected the Amanero to my BuffaloIII with Teleporters which seems to work well and I have no fizzing/sizzling/squeaks noise wise so good on that front also. SQ wise Well it sounds pretty good and certainly a whole bunch better than the Tenor base converters that I’ve tried which sound a little flat and lifeless by comparison. However Compared to my other USB/i2s IMHO it sounds just a little dry without the same level of musical involvement. But For the price the Amanero is very good indeed with the same broad and high soundstage that I’ve come to expect from USB/i2s. Depth wise it seems a little restricted to me but that’s an area that the other USB board really excels and just IMHO. Maybe something to do with the Salas shunt that I have powering it at the moment. IMHO anyone who has ordered the Amanero will not be disappointed. Nope It’s a good sounding unit with plenty of tweaking opportunities so much fun to be had on that front. My hunch is that with a dedicated PSU on the Almanero it could be improved quite a bit but I’m waiting on some more Salas Shunts to arrive ATM so have not tried that for myself. So it’s just a guess . I’m thinking on two areas to try PSU wise 1) 3.3V for the board 2) Giving the XO's a dedicated supply. I’m going to avoid going for the dedicated 5V option as reading through the DIYAUDIO thread the Almanero needs the 5V Vbus to confirm connection to the PC. I may be wrong on that so anyone who has tried let us know the outcome. I’ve not tried long USB cables but that could be something to avoid also Latency wise but again anyone who is using them may report in. Just a few random thoughts from the work camp So a day in the recovery lounge and then back to hard labour. Take care
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Post by Deleted on Oct 29, 2012 12:09:45 GMT
Hi Shaun, I have tried the above, using a Jaycar injector, it's quite happy on recognition and sounds noticeably better even with this humble upgrade.
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Post by Deleted on Oct 29, 2012 13:20:48 GMT
Hi Chris Thanks for the heads up on that. Yup just goes to show that it’s not always wise to believe all that you read. Should have tried it out but well it’s been hectic this end. Just plugged mine into Alex’s Power injector and well errrr its better in just about every way. (like bloody hell this sounds loads better) Better balance to the sound and much more depth (slight vagueness and thinness gone). Also the detail and musicality have improved far beyond what I was expecting so most worthwhile. Sounds much closer to the other board. At half the price Sounding really really good now with a much more involving sound. Amanero seems like a bit of a sonic bargain with the Power injector. Super duper Get those injectors up and running guys (i have a few spare JLH boards should anyone wish to try with the Amanero just pm me if interested) For those waiting for the boards to arrive It’s treat time approaching i'll head up @ DIYAUDIO Take care
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Post by Deleted on Oct 29, 2012 17:20:35 GMT
Hi Shaun I haven't checked with Greg recently, but after I verified a couple of weeks ago that the new JLH PCBs performed correctly, there were 100 dual JLH PCBs ready to be sent to Jon for distribution. Regards Alex
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Post by Deleted on Oct 29, 2012 17:32:47 GMT
Hi Shaun I haven't checked with Greg recently, but after I verified a couple of weeks ago that the new JLH PCBs performed correctly, there were 100 dual JLH PCBs ready to be sent to Jon for distribution. Regards Alex Hi Alex sounds interesting i have Greg's originals in your 15W class A and they are really nice boards. your USB power injector really does lift the performance of this USB card quite a long way. had a good listen today whist off of chain gang duties here. with your Power injector a really good sounding USB card great work again Alex take care
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Post by Deleted on Oct 29, 2012 19:35:14 GMT
Hi Shaun Sounds like you need a few high energy tracks to give it a workout ? Kind Regards Alex P.S. PM sent.
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Post by Deleted on Oct 29, 2012 20:10:06 GMT
I'll have to bring my "USB bad boy" into work and give it a whirl! Being a double I can both the disc drive and the Amanero on it
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