I saw over on head-fi here that the Soekris board was updated to be enabled in left-right balanced mode so I bought another DAM1021-2 to let myself play with this feature:
Soekris released a new set of features with the latest firmware. Looks like balanced dual mono is now possible
- Revision 0.99 firmware have the following bug fixes / improvements / new functions:
- PLL Clock Sync at sample rate change cut down to less than 0.2 second
- Isolated Serial port now works, note that port is at 3.3V cmos level
- Serial Port now interrupt driven, no character loss at high speed
- Volume Control now is -80db to +10 db, and phase bug fixed
- Volume Control also now have zero crossing detect
- Power Off plop can be reduced to 1/3 by adding a single 27K4 resistors, see picture attachment
- FIR1 filters doubled in size, so max 2032 coeff @ 44K/48K, 1016 @ 88/96K, 508 @ 176/192K, 127 @ 352/384K
- You can now select four sets of filters, named Linear, Mixed, Minimum and Soft.
- FIR1 coefficients are now 1.31 format, filters should be good down to around -150 db
- Stock filter now have improved deemphasis filter
- Input Source Select bug fixed
- New mode setting: Normal, Inverted, Balanced Left, Balanced Right
- The tiny bug on signal saturation on -full scale fixed
- Should now be possible to do balanced and crossovers by parallel the inputs and connecting the isolated serial ports together, more details to follow.
- DSD is next major feature on the list. This would be the first R2R DAC with built in DSD conversion.