Hi OP, cleeds is exactly right. If you want to call it "Redbook" it has to be 16 bits, stereo, at 44.1 kHz.
However, having owned the ARC Dac 8, I have some suggestions for you.
1 - It's way past time to update it. Even the DAC 8 is bettered by almost any modern DAC. Modern DACs do amazingly well with Redbook compared to prior.
2 - What DID make a huge improvement for the DAC 8 was an upsampler from Wyred4Sound, the Remedy. It will resample everything to 96 kHz/24.
Best,
E
However, having owned the ARC Dac 8, I have some suggestions for you.
1 - It's way past time to update it. Even the DAC 8 is bettered by almost any modern DAC. Modern DACs do amazingly well with Redbook compared to prior.
2 - What DID make a huge improvement for the DAC 8 was an upsampler from Wyred4Sound, the Remedy. It will resample everything to 96 kHz/24.
Best,
E