Hi, good idea. but I checked the datasheet again and find we can't support DSD now, because we use this chip in stand-alone mode. May be we could have a advanced version to make it later.
yes you can try to do that.
Hi guys, anyone tried it with outputtransformers like Lundahl or Edcor ? maybe no reason to do it.
Also does it work with WASAPI or ASIO from a mediaplayer like J River when using USB ?
Also does it work with WASAPI or ASIO from a mediaplayer like J River when using USB ?
Just to add to my question above, another newbie qustion : If there's no LPF, how can the circuit removes the ultrasonic garbages with only caps on the output ?
hallo
ik las dat je de scr met een passieve uitgang gebruikt, ik had dit ook en vond het een verademing vergeleken met de normale uitgang, maar sinds kort werkt dit niet meer goed, eerst 1 kanaal wat uitviel, later ook het tweede...als ik actief weer aansluit, werkt alles weer, dus de dac is niet de dader, hoe heb jij de passieve uitgang toegepast, zou graag weer relaxed willen luisteren, gaarne tips...
groeten, Tom
6.8uF obbligato caps in series, with the + outputs of the dac, and a resistor parallel to gnd... simplest solution out there...
Half the output signal, less good specs (as this DAC chip was definitely intended the be used with both the + and the - output pins) and HF garbage as a bonus. I guess if this is good sound anything sounds good.
Really, I think there are more elegant ways of making an output stage for good DACs. Transformers for instance when one wants the passive way or this active one, check the discrete output stage:
Ray's Audio Page
I used CS4397 frequently with transformers just as WM8740 and in both cases good transformers were the best compared to just a cap. And full signal output + good specs too. Transformers have the nice feature that HF does not pass till some account. The whole point with transformers is the higher cost and where to find good ones.
Really, I think there are more elegant ways of making an output stage for good DACs. Transformers for instance when one wants the passive way or this active one, check the discrete output stage:
Ray's Audio Page
I used CS4397 frequently with transformers just as WM8740 and in both cases good transformers were the best compared to just a cap. And full signal output + good specs too. Transformers have the nice feature that HF does not pass till some account. The whole point with transformers is the higher cost and where to find good ones.
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Never claimed this was the best that could be done... It was just much better than what I had tried before (and extremely simple), which was a tube stage.
I agree that a buffer+filter should be added.
I agree that the differential output can be summed, although not necessary
I agree that a gain stage can be added, although not necessary.
I however maintain that direct passive output is not a bad solution for its simplicity, and I compared the SRC with direct output, and it sounded very close, if not better, to a Creek CD player (which was in its day highly acclaimed).
This dac was designed so people could use the output stage they prefer. All the outputs from the cs4398 are easily available on the board.
If you don't like the idea of the simplisitic way of only a cap, then you can add whaterver output stage you want.
That said, I personally stand by the simple direct out way, I think it sounds really good, and this way also sounded much better on my gigawork dac.
A gain stage is not necessary, with both outputs used you will have normal signal level. This is inherent to symmetrical outputs. You loose signal when only one output is used. It would be different if both outputs were coupled out to a balanced preamp.
Maybe adding information on different output solutions is a wise idea so users will be well informed. For instance a drawing with both the + and - outputs and the options one has. This is contructive comment, do not understand me wrong please.
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Newbie questions
Please pardon my ignorance. I've been reading to see which cheap DAC to get and this one seems the most promising for me so far. My plans would be to use a lampizator kit for ouput. My questions are: 1) I should be able to use the lampizator kit with this dac? 2) If I order it without the USB interface, can I later add a USB to I2S card that does higher sampling rates (192khz for example)? Something like the ExaDevices exaU2I when cheaper ones appear on the market... Thanks
Please pardon my ignorance. I've been reading to see which cheap DAC to get and this one seems the most promising for me so far. My plans would be to use a lampizator kit for ouput. My questions are: 1) I should be able to use the lampizator kit with this dac? 2) If I order it without the USB interface, can I later add a USB to I2S card that does higher sampling rates (192khz for example)? Something like the ExaDevices exaU2I when cheaper ones appear on the market... Thanks
Why adding up-sampling ship?
Hello,
I don't understand this specific point: CS4398 has up-sampling capabilities. So, what is the point in adding an up-sampling chip?
Thanks for any comment on that point!
Hello,
I don't understand this specific point: CS4398 has up-sampling capabilities. So, what is the point in adding an up-sampling chip?
Thanks for any comment on that point!
Hi, I think this DAC is easy to work with many amplifier kits. And you can use a USB to cox/optical module to work with the dac. We don't have I2S input on board.
Hello, I don't know cs4398 has up-sampling. I know it has sample rate setting pins and we already set it to accept 100~200kHz, and we up-sample the input signal to 192kHz default. The up-sampling function make the DAC chip work always at same sample rate regardless the input SR.
yes. If the signal on s/pdif input bus is 44.1k or other sample rate, the I2S signal's sample rate on the output of receiver chip will be same, but after cs8421, the sample rate will become 192kHz.
Hi,
I am curious about the DAC, mainly some technical specs. I am trying to put it to a class A amp without any capacitor.
Trying to find out these parameters.
1) what is the Vout peak to peak?
2) What is the DC voltage at the output?
Thanking in advance.
Oon
I am curious about the DAC, mainly some technical specs. I am trying to put it to a class A amp without any capacitor.
Trying to find out these parameters.
1) what is the Vout peak to peak?
2) What is the DC voltage at the output?
Thanking in advance.
Oon
Hi.
I want to replace the digital board of a Kora Hermes II dac (which uses a cs43122 dac chip) with a newer dac board, and I am considering this board. I want to retain the analog stage which is a ECC82 tube output stage, which I like very much, and gain some channel separation, which is basically the only complaint I have with the Kora hermes II dac, and maybe some detail. I have 2 questions:
1) does this DAC board accept 24/192 data from the coaxial input?
2) Is it practically difficult in this board to take the differential inputs directly, place a capacitor on each one (so four capacitors rather than two) and send those to the tube stage? I have a decent knowledge of theoretical electronics (I am a physicist) but my soldering skills are rather basic...
thanks,
Massimiliano
I want to replace the digital board of a Kora Hermes II dac (which uses a cs43122 dac chip) with a newer dac board, and I am considering this board. I want to retain the analog stage which is a ECC82 tube output stage, which I like very much, and gain some channel separation, which is basically the only complaint I have with the Kora hermes II dac, and maybe some detail. I have 2 questions:
1) does this DAC board accept 24/192 data from the coaxial input?
2) Is it practically difficult in this board to take the differential inputs directly, place a capacitor on each one (so four capacitors rather than two) and send those to the tube stage? I have a decent knowledge of theoretical electronics (I am a physicist) but my soldering skills are rather basic...
thanks,
Massimiliano
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