Musiland 03US I2S Output MOD
The Musiland 03US can deliver 32bit, 384KHz sample rate material to its internal DAC. Getting this signal out through I2S would be of great benefit to an external DAC such as the Buffalo II DAC which natively supports 32bit/384KHz sample rates.
In addition, Musiland claims that the new implementation (larger FPGA) has been optimized to further reduce jitter. We can determine (in a qualitative manner) the amount of jitter reduction by looking at the minimum DPLL setting in the DAC which is an indication of incoming jitter in the signal.
NOTE: When using the Musiland MINI with the I2S output mod, the minimum DPLL setting is some where between “LOW” and “MED-LOW” which is one to two notches above the lowest setting. [The DPLL settings scale in the DAC are “LOWEST”, “LOW”, “MEDIUM-LOW”, “MEDIUM”…]
Here are the connections for I2S:
Not being very good with soldering surface mount components, I had to practice and experiment and arrived at the following implementation:
- Use 30 gauge wire
- Wrap the thin wire around a thicker wire to allow some stiffness in order to hold the thin wire in place and prevent it from moving to adjacent pins when applying the soldering iron. I found this essential
- Pre-tin the wire and then heat the wire on top of the pad, allowing the solder to flow
- Use additional liquid flux
- Use regular lead solder
- For Bufflao II/III DAC, we don’t need MCK. We need LRCK, BCK, DATA and GND
Here is the result:
You can see that the above method is completely non-destructive. The 4 pins are glued with hot-glue.
After the mod, I tested the headphone output and works fine. At least 1/2 of the value of the Musiland 03 is the heaphone amplifier.