😉 Then don't be so harsh to the man. I've seen much worse advertising on products much worse. At around 300€ this IS a bargain.
Otherwise totally agree with SSassen etc.
hi everybody,
in short words: can anyone tell me the difference of the oem board in comparison to the dac sold now? what are the advantages?
thanks and kind regards, tiggerkater
in short words: can anyone tell me the difference of the oem board in comparison to the dac sold now? what are the advantages?
thanks and kind regards, tiggerkater
where did Paul the filter guy go to?
the website moredamfilters seems abandoned
seems a hell of a shame to lose this fabulous filter/mod resource he certainly has the knack so to speak
i know he had some board damage issues where they ever fixed
maybe filter brewing was getting more time consuming
and with his dac board woes and costs lost heart he ceased development
i know he had a donations box at moredamfilters
but id doubt it ever got anywhere near enough to replace broken equipment
i doubt this dac is the unobtainium best dac ever were looking for TNT but its still the closest thing we have as it bests all SD chip implementations i have at least
the spec sheet might be impressive (as it was before vref alterations) but in the end results can only be subjectively determined
the website moredamfilters seems abandoned
seems a hell of a shame to lose this fabulous filter/mod resource he certainly has the knack so to speak
i know he had some board damage issues where they ever fixed
maybe filter brewing was getting more time consuming
and with his dac board woes and costs lost heart he ceased development
i know he had a donations box at moredamfilters
but id doubt it ever got anywhere near enough to replace broken equipment
i doubt this dac is the unobtainium best dac ever were looking for TNT but its still the closest thing we have as it bests all SD chip implementations i have at least
the spec sheet might be impressive (as it was before vref alterations) but in the end results can only be subjectively determined
SSassen, before you make statements like that about batteries make sure you study the topic first. There are a lot of reports out there about the noise levels of different batteries. In summary, batteries noise levels typically are in the range of -120-150db. This is not bad at all.
I have, have you? And the levels you quote are meaningless, I'll leave for you to figure out why.
Also, and I'm stating the obvious here, if you really want to bring up a discussion topic which was closed tens of pages ago you better come well prepared with a plethora of well researched examples, otherwise I suggest you don't bother as you bring nothing new to the table.
First I need to get the new dac1101 and dam1121 out, then I can start thinking about the future....
No you can't parallel USB signals, but you can use one USB to I2S board and wire the I2S signals to each dam1021. Wires need to be short, or be buffered to each board.
Ouch - you failed also your second commandment: "Condemnation without proper examination equals prejudice".
//
1.05 filters are the same as 0.99 filters, only added support for DSD rates which require their own filter definitions. The filter files are interchangeable, but for DSD to work you of course need the DSD filters....
1.05 had bugs which in certain circumstances could cause the dam1021 uC to lock up, that should be fixed in 1.06. Any other versions was test versions and should be gone by now....
TNT: Probably you just want to be "straight" or "direct" or whatever. But for many (including) me your tone sound quite offensive sometimes. Please consider that, because it is usually the one that is most offensive that pulls everyone down with them. As seen by the kindergarten-fight that is just taking place.... I think this forum and this project can do better.
Thanks for pointing that out.
Thanks for pointing that out.
Hi Søren,
You have mentioned the three different versions of the vref circuit (see below). Have you measured the overall specs of the DAM with these revisions? If, yes, could you share them? I would like to see which revision to adopt for my board (I have v1 board) but removing 0603 SMT is beyond me.
You have mentioned the three different versions of the vref circuit (see below). Have you measured the overall specs of the DAM with these revisions? If, yes, could you share them? I would like to see which revision to adopt for my board (I have v1 board) but removing 0603 SMT is beyond me.
What exactly is the "nastyness" of SD conversion from a technical perspective? I know I don't like the sound I've heard from SD concerters vs. the analog source, and also know something about the significant technical challenges these design pose for a practical implimentation, but - shouldn't it work well at least in theory? Or are there theoretical hurdles that prevent a SD converter from recreating program material as well as a discrete PCM DAC like the DAM?
Also, Soeren - will you consider doing something similar for an AD converter? Maybe using one of the lates high end SAR chips? Is SD as big a problem for AD conversion as it is for DA conversion?
Thanks.
Also, Soeren - will you consider doing something similar for an AD converter? Maybe using one of the lates high end SAR chips? Is SD as big a problem for AD conversion as it is for DA conversion?
Thanks.
DS DAC's work perfectly fine with a steady signal, like a 1 Khz sine, but once you feed them music strange things happens, those 5th order modulators are impossible to control, although some mfg are getting good at reducing the side effects....
Yes, that's on my list, the new LTC2380-24 look amazing, coupled to a FPGA with decimation filters and with discrete input buffers....
It's funny how you relatively easy can make a very good SAR ADC, but it's pretty hard to make R-2R DAC chips, probably because the SAR ADC use switched capacitor networks, which can't really be used for R-2R DAC's, they need R-2R networks. (Yes, I know the early Philips DAC's, but we're talking 24 bits at 1.5 Mhz).
DS ADC's have the same problem as DS DAC's, a DS ADC is in fact a DS DAC with a comparator. You can then say: but most music are recorded using DS ADC's ? I have a theory that multi channel recording reduce the DS problems as each track is simpler than the finished master track.... And nowadays most recordings are made at high sample rates with also reduce the problems....
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Awesome, I would buy that in a heartbeat. 🙂
The recording process makes excessive use of (almost exclusively SD) conversion these days, also bad digital processing in production, makes listening to much of the current output unbearable. Maybe multitracking could reduce the "DS problem" in theory, but then you are stuck with inferior ITB ("in the box") mixing/mastering plugins that come with a huge baggage of their own problems (aliasing, bad real-time up-/downsampling, a general inability to accurately model analog processes with the availible processing power, etc.). So in reality signals are very often sent through converters multiple times at the mixing as well as at the mastering stage, single tracks, stems, sum, today. The fact that auditioning in the studio is now mostly done via SD converters does not make things better... I also hate going to a live concert these days - only to get played back a mix of what's going on on the stage in front of me from a digital console filled with SD converters...
Higher sample rates use a lot more processing power, so they're not really that common in day to day use. Classical may be different, but for pop, rock, hiphop etc. that's what it is. I've also encountered more than one converter that seemed to have trouble with higher sample rates, exhibiting more of the dreaded muddy/glassy sound than at lower sample rates.
Anyway, enough with the OT. One more question though: Does the DAM1121 allow for different filters like the DAM1021 or is there a fixed one "built in"?
I've got two questions:
If I've desoldered the output opamps from the board, do I still need a negative voltage power supply?
Do the positive and negative voltage supplies for Vref need to be tracking each other?
If I've desoldered the output opamps from the board, do I still need a negative voltage power supply?
Do the positive and negative voltage supplies for Vref need to be tracking each other?
soekris: Was this ever considered as a Kickstarter (or other crowdfunded) project?
Why or why not?
Seems that the crowd would've been plenty supportive. And not just DIY ... maybe even commercial interest, as your DAC could easily be incorporated into Ayre, Rotel, Oppo, etc.
This is a LONG and dense thread so my query may've been prev. addressed.
Why or why not?
Seems that the crowd would've been plenty supportive. And not just DIY ... maybe even commercial interest, as your DAC could easily be incorporated into Ayre, Rotel, Oppo, etc.
This is a LONG and dense thread so my query may've been prev. addressed.
The OEM module is meant for companies to use them. On volume the chip dacs even the best ones cost less than 10 dollars each on volumes. Where in this dac module should go in highend dacs as its expensive when compared to common chip dacs. But for the money this is very good dac.
probably because hes got his own engineering company!!!
and all can be done in house
well filters and modifications can be done by anyone
but maybe a crowdfunded group of individuals could advance the dam dac in such a way that could benefit everyone