At the Axpona show I just attended; Mojo Audio's owner was claiming I2S was never meant as an external input/output and that's why it isn't a standard. It was meant as an internal only connection not to exceed a few inches. This was heard by many people at the seminar he gave. Interesting how its evolving and how it's being used by some people.
Musetec (LKS) MH-DA005 DAC
Some history: I was the OP on a four year old thread about the Chinese LKS MH-DA004 DAC. It achieved an underground buzz. The open architecture of its predecessor MH-DA003 made it the object of a lot of user mods, usually to its analog section, rolling op amps or replacing with discrete. The MH-DA004 with its new ESS chips and JFET analog section was called better then the modified older units. It has two ES9038pro DAC chips deliberately run warm, massive power supply, powered Amanero USB board, JFET section, 3 Crystek femtosecond clocks, Mundorf caps, Cardas connectors, etc., for about $1500. For this vinyl guy any reservation about ESS chips was resolved by the LKS implimentaion, but their revelation of detail was preserved, something that a listener to classic music especially appreciated. I made a list of DACs (many far more expensive) it was compared favorably to in forums. Modifications continued, now to clocks and caps. Components built to a price can be improved by costlier parts and the modifiers wrote glowingly of the SQ they achieved.
Meanwhile, during the 4 years after release of the MH-DA004, LKS (now Musetec) worked on the new MH-DA005 design, also with a pair of ES9038pro chips. This time he used more of the best components available. One torroidal transformer has silver plated copper. Also banks of super capacitors that act like batteries, solid silver hookup wire, 4 femtoclocks each costing multiples of the Crysteks, a revised Amanero board, more of the best European caps and a new partitioned case. I can't say cost NO object, but costs well beyond. A higher price, of course. Details at http://www.mu-sound.com/DA005-detail.html
The question, surely, is: How does it sound? I'm only going to answer indirectly for the moment. I thought that the MH-DA004 was to be my last DAC, or at least for a very long time. I was persuaded to part with my $$ by research, and by satisfaction with the MH-DA004. Frankly, I have been overwhelmed by the improvement; just didn't think it was possible. Fluidity, clarity, bass extension. A post to another board summed it up better than I can after listening to piano trios: "I have probably attended hundreds of classical concerts (both orchestral and chamber) in my life. I know what live sounds like in a good and bad seat and in a good and mediocre hall. All I can say is HOLY CRAP, this sounds like the real thing from a good seat in a good hall. Not an approximation of reality, but reality."
Meanwhile, during the 4 years after release of the MH-DA004, LKS (now Musetec) worked on the new MH-DA005 design, also with a pair of ES9038pro chips. This time he used more of the best components available. One torroidal transformer has silver plated copper. Also banks of super capacitors that act like batteries, solid silver hookup wire, 4 femtoclocks each costing multiples of the Crysteks, a revised Amanero board, more of the best European caps and a new partitioned case. I can't say cost NO object, but costs well beyond. A higher price, of course. Details at http://www.mu-sound.com/DA005-detail.html
The question, surely, is: How does it sound? I'm only going to answer indirectly for the moment. I thought that the MH-DA004 was to be my last DAC, or at least for a very long time. I was persuaded to part with my $$ by research, and by satisfaction with the MH-DA004. Frankly, I have been overwhelmed by the improvement; just didn't think it was possible. Fluidity, clarity, bass extension. A post to another board summed it up better than I can after listening to piano trios: "I have probably attended hundreds of classical concerts (both orchestral and chamber) in my life. I know what live sounds like in a good and bad seat and in a good and mediocre hall. All I can say is HOLY CRAP, this sounds like the real thing from a good seat in a good hall. Not an approximation of reality, but reality."
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Mojo Audio is absolutely correct. I2S is primarily meant for chip-to-chip connection which typically is few cm. The longer the traces the more it suffers signal integrity. However, I think the external connection that most are using with audio DDC/DAC combo throws away the clock and uses the dac's own clock to resample. In such case, the I2S is just passing the data stream over the pins and you always want the least shortest path. As I stated earlier, IMO i2s will only benefit cases where the dac doesn't have a good usb implementation and the server is too noisy. |
as for the standard or the lack of it, it has evolved into couple different ones - PS Audio, Rockna, Gustard. Most manufacturers are following PS audio and some, like Denafrips has configurable pins assignments. Funny thing I still remember when I owned the PS Audio DS dac a while back (bought the DS from PS Audio when it was first released), I bought a Gustard DDC to use with it and which was following its own standard. It wasn't reconfigurable to PS Audio pin-out. I needed a custom hdmi cable to make them work together but no one would build me one. I finally had to DIY'ed my own cable but it did sound a little better and cleaner than the usb input but honestly at that time my diy server wasn't as optimized as it is now. It could have been a totally different outcome if I had experimented it today.
Here is the database of i2s devices
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@willywonka Hi, With all respect to you, Mojo Audio doesn't believe in DSD. They promote DOP over DSD. He's FOS. He's a Luddite. PS Audio have a much better grasp of I2s.
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@debjit_g Yes I agree I will experiment with different HDMI cables and different lengths but I'm enjoying the break-in so much at the moment to change anything. I've got a 0.35m Oyaide CAT 7 RJ45 Ethernet cable which I will try next. I've got a feeling that RJ45 cables are going to be better than HDMI because the wires are sightly larger but we'll need to wait and see. |
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