Audio Alchemy DTI Pro 32 digital transmission interface -- basically a resolution enhancement and jitter reduction device to use between your digital source and your DAC. Works extremely well at reducing jitter, and also "dithers" out word length (user selectable). There's a much more detailed review online on the Soundstage! website which you can google and read if interested.
Audio Alchemy DTI.PRO 32
Inputs: 3 (Coaxial, ST glass or TosLink, and I2S)
Outputs: 4 (I2S, Coaxial, AES/EBU, and ST glass)
Power Supply: +/- 8 Volts and +/- 18 Volts
Resolution: 32 bit internal processing