I believe in the cumulative effect. The fewer parts the signal passes through, the better.I see some unused floor space!
Last night I only got to try the Sparkos SS3601 with the PCM1702. The bass is well defined, has a punch, is a little less pronounced than with other OPAs. Midrange is excellent, clean, natural and detailed. Treble is prominent and sharp at times, similar to PCM63 with SS3601. Lot of details. Obviously, it is necessary to experiment a bit and add some capacitor between Iout and GND to calm down the highs. 3D presentation is excellent. The DAC does 384kHz sampling rate without fail.
If you use JLS without shifters and you don't have an analog output with opamps - you don't need a PCB. You can literally use a few wires point to point to make a DAC
Just be careful, everything you add in front of the dak spoils your sound. JLS direct to DAC is the best we've heard so far. The same goes for I/V stage. If that analog output stage isn't up to Muses and Bursons, then it's a big investment and no return.
If you use shift registers and an I2S signal, bridge the connection on the PCB from the I2S connector to the shift registers and DAC, without a 22 ohm resistors. A Miro PCB is required if shift registers are used. If shift registers and OPAs are not used, then everything can be put on the raster board, it's very simple.
If you use shift registers and an I2S signal, bridge the connection on the PCB from the I2S connector to the shift registers and DAC, without a 22 ohm resistors. A Miro PCB is required if shift registers are used. If shift registers and OPAs are not used, then everything can be put on the raster board, it's very simple.
Get a usb to i2s board - JL Sounds is just an example cited by members.
Connect this board's i2s outputs to the i2s inputs of the Miro PCM63 dac board. Skip the op amp IV on the dac board. Wire out the Iout to the output stage of your desire. Isn't this what you want to do?
Alternatively, skip the shifters on the Miro PCM63 dac board. JL Sounds board has the capability and can be connected directly to the PCM63 inputs. The Miro PCM63 dac board provisioned for direct connection from an external inputs by cutting some traces.
@NikNet
Here is a connection diagram of the JL Sounds usb board to the PCM63P dac.
The usb to i2s board that you are using need to have this capability for direct interface to the PCM63P inputs if you intend to skip the glue logic on the DAC board. Otherwise just build the board as it is, use any usb i2s boards you have, skip the IV op amp, wire out to your favourite output stage.
Here is a connection diagram of the JL Sounds usb board to the PCM63P dac.
The usb to i2s board that you are using need to have this capability for direct interface to the PCM63P inputs if you intend to skip the glue logic on the DAC board. Otherwise just build the board as it is, use any usb i2s boards you have, skip the IV op amp, wire out to your favourite output stage.
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@miro1360 I really appreciate the efforts you are putting in to help DIY community making different variations of excellent DACs which are better than many commercial products.
I recently noticed another addition to the project which is CPLD based logic to replace the shift registers. Although I have never played with Altera or Xilinx devices before but having a general idea I was thinking wouldn't it be possible to develop signal switching (I2S 2-3 in 1 out or emulation of shift registers and then out to the DAC chips), with the hope that EPM240 has enough juice and memory to do it.
Just an idea..
Have ordered a few boards though.
I recently noticed another addition to the project which is CPLD based logic to replace the shift registers. Although I have never played with Altera or Xilinx devices before but having a general idea I was thinking wouldn't it be possible to develop signal switching (I2S 2-3 in 1 out or emulation of shift registers and then out to the DAC chips), with the hope that EPM240 has enough juice and memory to do it.
Just an idea..
Have ordered a few boards though.