Just get a ESI Juli@ sound card: Easy I2S from Juli@ PCI sound card

I've been trying to contact Pete Millett but have so far been unsuccessful. I've tried the email address on his website but so far no luck. Anyone knows of another way to contact him?

The Abrahamsen V1.0 CD Player runs an AK4396 DACs with an AK4125 doing upsampling, I would not be surprised if the same is true for this dac.

Quote: Originally Posted by Mazuki I think "wrong" is not the right term here. If you look at the DAC description here, they highlight that the Hyperstream Modulator is different from conventional delta sigma DACs. Oh please, pretty much every sigma delta modulator unique in one...

Quote: Originally Posted by Mazuki I don't think the Buffalo is quite delta sigma. Then you think wrong.

This is a good site: Badcaps.net - Badcaps Home

Quote: Originally Posted by 1UP Bumping this. The Burson modules are supposedly just OEMs from a Chinese manufacturer, who has released new designs and they are hella cheaper (e.g. single less than an OPA627), though ordering may be a less transparent process. н¨ÍøÒ³ 1 diyAudio...

Quote: Originally Posted by Beefy From everything that I have read, I'm starting to get the impression that the differences between the digital component of these DACs is all very much of a muchness. It is the analogue section where things are make-or-break. For example, the 8741...

Quote: Originally Posted by Crowbar Unfortunately those THD analyzers don't show the individual harmonics, which is critical since different harmonics have a very different perceptual weighting. To do what jcx said above, you would use the filters and of a THD analyzer to...

Quote: Originally Posted by regal I have been working with the PCM1704 which is considered one of the top current output R2R DAC's. The PCM1704 is the only multibit DAC still in current production, however there are better ones. Quote: Originally Posted by regal The...

Quote: Originally Posted by Crowbar Quote: Originally Posted by jcx add some narrow filters, low noise gain and detecting -160 dB distortion products is possible even with $130 Juli@ References to how to do this please? See here: Distortion Analyser Cordell...

Good job.

Quote: Originally Posted by infinitesymphony It seems like it wouldn't be ideal in terms of impedance matching, since you'll need to use a splitter that probably doesn't follow the 75-ohm standard for digital coaxial S/PDIF transmission. But my guess is that in practice it probably won't...

Quote: Originally Posted by 00940 Here's for the record what I'm planning to use. To give the deserved credits, the I/V is from Cauthemoc and the amp serving as receiver is a Gilmore's dynalo. I don't deserve full credit for the I/V. I ripped some parts from Wadia, which in turn...

If my memory serves me correct, the CD-A7 was one of Akai's top of the line players back in the late 80's. It uses the PCM53 DAC from Burr Brown, a highly regarded NOS DAC.

My apologies if this has already been mentioned, I didn't have the patience to read through the 28 pages that make up this thread. I took quick a look into a DA100 earlier today, I had to hear what all the fuss was about. I was disappointed to learn that there are no less than 10 opamps in...

Quote: Originally Posted by Asr Man what a killer machine! Features over the DP-500: + SACD playback + MDSD digital signal processing (moving-average filter w/ 7 delay devices) + AD1955 DAC chip, 8 per channel (16 total) + two toroidal transformers + encased in a wooden cabinet...

There are a few FireWire audio processors out there, e.g.: Oxford Semiconductor: Firewire audio: OXFW970 Take note however, they are far from DIY friendly.

Quote: Originally Posted by error401 But how do you do BGA with a standard iron? I'm interested. Also, ever tried QFN? QFN can be soldered with a thin tipped soldering iron and a little bit of patience. BGA can be soldered with a kitchen oven and lot of patience. QFP is easy.

Quote: Originally Posted by Atchoum I have psu problem. When plugged my JSR psu (+12/-12V) give only +2V on the + side although it works perfectly unloaded.... You're drawing too much power.

You can save some parts by using the same bias for the output emitter follower as I used for the current source in the conveyor. In other words, connect the base of the output current source transistor to the same location as the base of Q12 and Q14 in my schematic. You could also cascode it in...

Quote: Originally Posted by 00940 Thinking of it... shouldn't one adjust R5 to supply 10ma - 6.2ma and thus 3.8ma rather than 16.2 ? From what I can tell from the datasheets the PCM1794 has a negative offset of 6.2 mA, meaning that it will suck up this much current at bipolar...

Quote: Originally Posted by regal So its passive + a buffer with the DAC seeing a very high 300R load ? Looking at the other designs posted here I am thinking only Twisted Pairs would handle the high DC offset of the new PCM179x chips. This is what I ran into with the Borbely I/V...

R6 is set to allow about 10 mA through the Q9. If you go below this the distortion increases, above this and the 2SC2240/2SA970 will start to loose their linearity. You should adjust R5 to get 10 mA through Q6 including the DAC offset. For example, if you are using the TDA1541, which has 2 mA...

Quote: Originally Posted by Russ White Now that is very interesting! I actually have looked at the current conveyor before too. But not for a while. It does seem promising. Feel free to build it and compare to your balanced opamp converter. Quote: Originally Posted by...