Deleted
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Post by Deleted on Sept 18, 2012 20:04:48 GMT
It is my PK, very much like Shaun's in this pic: As basic as they come, only I2S inputs.
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Post by Deleted on Sept 18, 2012 20:55:41 GMT
Yeah, I apply a similar rule of thumb. I do! It lives inside an amplifier/DAC combo here. All I need to do is take out the existing ebay cheapie board and pop this one in! The ebay jobby has already had its power supply modified to take a nice JLH 3.3vdc which made a considerable improvement. No doubt we'll be messing about with the Amanero too!
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Post by Deleted on Sept 18, 2012 20:59:52 GMT
Mmmm, . I hope you get your Amanero board quickly so that you can post you opinion if not too busy with more important things - after all, it's only hi-fi . Good luck with everything and let us know how it goes, as and when. Dave.
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Post by Deleted on Sept 18, 2012 21:15:55 GMT
I wonder if the Jean-Paul behind this pcb is the one who joined here, and then asked me for a copy of my PK Dac schematic? I'd say they certainly look similar: May not be the same person. The DIYAudio Moderator is supposed to be from The Netherlands, our member who has been a member for several years, is /was from France. Alex
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Will
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Post by Will on Sept 19, 2012 9:04:45 GMT
I didn't supply the schematic, but there is enough in the PK thread to get people away, and it's not the most complex beast either.
As for impressions, none myself yet, but Merlin over at diyA subjectively rates the amanero better than a hiface, when both fed from a salas shunt supply.
This is quite promising having heard Syd's JK Mods Hiface, which I found to be excellent - better than the spdif from my soundcard, and also had an improved psu.
It's always all about the power supply...
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Post by Deleted on Sept 19, 2012 10:15:56 GMT
As expected my board has just arrived and probably Chris will get his too today. Here is compared to Will's PK DAC and an AA battery to get an idea of the size of the board. The red arrow points to the LDO that will need to be removed if one wants to use better quality external power, as can be seen on the pic the onbgoard reg (ADP-151) is a tiny SMD part so not for soldering noobs like me. @will, Domenico said theat the P3 header is not for PS but for firmware updates. A jumper has to be inserted from square to center round to get the FPGA into firmware flash mode. He'll be uploading a utility to update and self modify (event driven I2C commands) the firmware from Windows very soon. For those who don't have it, here is the datasheet: amanero.com/drivers/combo384-D.pdfAnother pic of Foobar playing native DSD: The red square shows DSD64 output at its native sampling rate of 22822400 Hz instead of the 441000, 88200, 176400 or even 352800 Hz reported when signal is output in PCM format.
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Post by Deleted on Sept 19, 2012 10:25:06 GMT
Nice one Javier, I'm glad you got yours . Keep us (me ) posted on developments 'cos I'm an even noobier solderer than you are. I've not had any further response on my 'commercial' enquiries for help with it yet. Dave.
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Post by Deleted on Sept 19, 2012 14:34:13 GMT
Javier, Yep, my board arrived too. Did you get the header with yours? Don't forget there is a second LDO on the board that we can play with Mine fired up perfectly first time (just quickly tried a Flac file) Just need a chance to attach it to something to hear music....!
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Post by Deleted on Sept 19, 2012 15:40:14 GMT
Hi Guys, Mine came with the header also. Don't know whether it's relevant but it is completely reversible, top to bottome and upside down so it might be possible to make wrong connections. (If only I knew what I was doing ). Dave.
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Post by Deleted on Sept 19, 2012 15:41:49 GMT
Javier, Yep, my board arrived too. Did you get the header with yours? I did, loose so I can solder cables straight to the board or use some sort of ribbon. Don't forget there is a second LDO on the board that we can play with Sweet J.! as if one was not enough... twice the chances of F'ing up. I've tried to read the schematics in the datasheet but still I'm not sure what this 2nd reg does exactly. It looks like it is not regulating power from the USB. Just need a chance to attach it to something to hear music....! In your case that should be a matter of minutes.
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Post by Deleted on Sept 19, 2012 16:27:01 GMT
BTW, it seems the 2nd regulator is there to reduce 3.3V to 1.8V for the Xilinks chip so it doesn't get its power from USB but from the first ADP-150. Removing the 1st reg should be enough to get rid of USB but the possibility of feeding independent HQ PS to the Atmel and the Xilinks is there thougb maybe it'll be a bit of overkill?
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XTRProf
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Post by XTRProf on Sept 20, 2012 12:59:50 GMT
Ah, mine arrived today ............. Testing time ............. Yup, recognised by the Foobar and outputing DSD as can be seen ................ Now must relook at moding the MF X-DAC V3 again. Javier, the DSD 1798 can take DSD and 384-24 at the same input lead, right?
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Post by Deleted on Sept 20, 2012 16:08:25 GMT
Chong I believe the V3 uses a DSD1792, the DSD1798 doesn't exist. The 1792 can take PCM up to 24/192 and DSD up to DSD256 but is far fom being a plug 'n play job. A micro controller is needed to alter some registers in the 1792 to make it listen to one format or the other.
The Amanero board is soon going to be able to act as a micro controller sending commands over the I2C bus of the 1792 but some delicate and difficult work is needed. The SPDIF input will probably have to be disabled somehow and probably local clock too.
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XTRProf
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Post by XTRProf on Sept 21, 2012 3:52:46 GMT
Chong I believe the V3 uses a DSD1792, the DSD1798 doesn't exist. Thanks. I know that. I'm thinking of changing the DSD1792 to a DSD1798 as I read some years ago it's interchangeable with the same footprints for datas, flags, commands, etc. I have the 1798 in my stash. If changing the 1792 to a 1798 can automatically make the V3 detect and play 384-24 and DSD128 files with the Amenaro USB, I will do it and worth taking the risk. It shouldn't be too much of a problem for me changing that SMT 1792 manually. WARNING: To all those following this thread, please don't do what I plan to do if you are not confident of taking out the 1792 in the MF X-Dac V3. That action CAN DESTROY some of the 1792 PCBA pads or even the 1792 dac chip and your V3 COULD BE DEAD after. Putting in the 1798 will be relatively easy though after taking out the 1792 perfectly. The 1792 can take PCM up to 24/192 and DSD up to DSD128 but is far fom being a plug 'n play job. A micro controller is needed to alter some registers in the 1792 to make it listen to one format or the other. The Amanero board is soon going to be able to act as a micro controller sending commands over the I2C bus of the 1792 but some delicate and difficult work is needed. The SPDIF input will probably have to be disabled somehow and probably local clock too. Thanks again. Noted. But we can still have the SPDIF if we put in the automatic source input switching PCBA that you mention somewhere, right? So it will automatically switch from USB to SPDIF whenever signal is detected in which input. In fact, the V3 has that automatic input switching between Toslink and Coaxial SPDIF built in too. Sorry, I had forgotten where you had mentioned that input switching PCBA as I was not here for sometime. Can put that link here again.
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XTRProf
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Post by XTRProf on Sept 21, 2012 3:55:54 GMT
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pagan
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Post by pagan on Sept 21, 2012 8:02:22 GMT
Chong I believe the V3 uses a DSD1792, the DSD1798 doesn't exist. The 1792 can take PCM up to 24/192 and DSD up to DSD128 but is far fom being a plug 'n play job. A micro controller is needed to alter some registers in the 1792 to make it listen to one format or the other. The Amanero board is soon going to be able to act as a micro controller sending commands over the I2C bus of the 1792 but some delicate and difficult work is needed. The SPDIF input will probably have to be disabled somehow and probably local clock too. i believe they change model prefix to suit old pcm1792 no dsd new model dsd1792 now with dsd Allan Both Geoff's and my V3s use DSD1792. Software version "DA03" is progammed into IC1. Alex
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pagan
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Post by pagan on Sept 21, 2012 8:16:48 GMT
XTRProf the pcm17** were hardware configured the dsd17** may be software configured also the software may not be in the V3 to use DSD
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Post by Deleted on Sept 21, 2012 8:49:42 GMT
Allan I accidentally edited your previous post with additional information. Alex
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Post by Deleted on Sept 21, 2012 9:31:45 GMT
Chong, you may have skiped a couple of lines in my post, 1) where I say that the DSD1798 DOES NOT EXIST. The only "DSD" models made by TI are: DSD1791 DSD1792a DSD1793 DSD1794 DSD1796 You can check it here: www.ti.com/paramsearch/docs/parametricsearch.tsp?familyId=582§ionId=630&tabId=2701&family=analog&uiTemplateId=AUDIO_PRDSRCH_TThe only 1798 they make is the PCM1798 Which is PCM ONLY as it has no DSD input pins AFAIK, the only TI chip that will do both DSD and 32/384 PCM is the PCM1795. The higher than 24/192 is even undocumented in its datasheet, it was found quite by chance though is not the 1st time this happens. The PCM1704 was originaly specified as a 24/96 part but now some of TI's own datasheets admit it can do 24/192 (check DF1706 datasheet). a big problem is the PCM1795 and the DSD1792 are NOT pin compatible. The PCM1798 will accept up to 24/384. Like with the PCM1795 the higher than 192 is undocumented as the chip is spec'ed as 24/192. There is no undocumented 32bit, 24bit is the hard limit (not that it matters at all IMVHO). 2) In order for any TI chip to play DSD software mode is compulsory so forget any easy modification just replacing chips. The Amanero board could be used for this task but the mod will be complex and good result is not guaranteed. It will involve disconnecting the current PIC which can cause malfunction. DSD mode in the DSD1792 uses pins 1,2 and 3 whereas I2S uses4,5,6 and 7. You'll have to make sure DSD pins are free. Local clock could not be used for I2S or DSD feeds from the Amanero, it'll have to be replaced by the Amanero's MCLK signal which will also would have to be used for SCK in order for I2C comnmands to work properly (needs to be in sync with the WDCK). Traces from the SRC4192 would need to be cut to avoid conflicts on the I2S pins, they could be connected to one of the Twisted Pear's 2:1 OTTO switches ( www.twistedpearaudio.com/control/otto.aspx) but that will still leave the problem of lacking the SCK necessay for the local PIC to work when used with the original SPDIF/Toslink inputs. All in all, I think getting another DAC is a much better idea. If you can do without 32/352.8 and 32/384 the Opus DAC from Twisted Pear is a nice & cheap option at $75 (plus BAL->SE board if your amp doesnt have BAL inputs, power supplies and case): More info on the Opus: www.twistedpearaudio.com/digital/opus.aspx if you want the full monty I'm afraid your only choice are Sabre DACs like the Buffalo III or the Acko DAC which with all options included will get you very close or over $1,000.
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Post by Deleted on Sept 21, 2012 10:05:51 GMT
Javier (et al), Regarding your amp not having balanced inputs, is another option to use Balanced to RCA interconnects? Might save a few beer tokens if so . I am watching this thread with great interest but I feel a bit like a caveman listening to a discussion about making a nuclear weapon so don't be afraid of stating the obvious. ATM I think I shall 'shadow' Javier as he seems to know what he's talking about and has the patience of Job when offering help to numptie me, so many thanks for that Javier .
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pagan
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Post by pagan on Sept 21, 2012 11:07:07 GMT
Alex if the v3 already uses the dsd1792 then does/will it accept dsd? Is there any firmware updates? Does MF list dsd support?
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Post by Deleted on Sept 21, 2012 11:19:34 GMT
Alex if the v3 already uses the dsd1792 then does/will it accept dsd? Is there any firmware updates? Does MF list dsd support? Allan I have never checked for that. The V3 is pretty old now, and I doubt that they even thought about DSD back then. Alex
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pagan
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Post by pagan on Sept 21, 2012 11:40:42 GMT
Alex if the v3 already uses the dsd1792 then does/will it accept dsd? Is there any firmware updates? Does MF list dsd support? Allan I have never checked for that. The V3 is pretty old now, and I doubt that they even thought about DSD back then. Alex Alex I couldn't image MF paying more for a component if they didn't utilise it.
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Post by Deleted on Sept 21, 2012 12:01:44 GMT
Allan A photo that I took of my V3 shows that pins 1,2 and 3 are not connected. Alex
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Post by Deleted on Sept 21, 2012 12:10:50 GMT
Alex I couldn't image MF paying more for a component if they didn't utilise it. I'm afraid Alex is right. As to why the chose the more expensive part... no idea, availability at the time? special offer? I've found and old pic from Alex's X-DAC V3 modding thread which show clearly how pins 1-3 are left unconnected: with a little zoom (pins 1-3 in red circle): If they left those pins unused it is quite easy to imagine that the firmware has no provision for DSD either.
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