Yes, 24bit. OK, I'll set it at 24bit.
What is ment by "Bitdepth" selecting Source bitdepth?
"Output Format
Open DSP Studio, and click on Output Format. Make sure it's enabled by checking the box next to Output Format.
Then, select these settings:
Sample rate
You only need to configure this if you play sample rates that are not supported by your hardware. For now, leave it on no resampling.
Channels
Set the channels selection to the number of outputs you are using from your computer. This is usually the same as the number of speakers you have attached. So for a 5.1 setup, select 5.1. For headphones, select 2 channels. For desk speakers, pick 2 or 4 channels.
Leave mixing set to JRSS v2.0 for the best quality output.
Bitdepth
Select the highest bitdepth your hardware supports (usually 24-bit)
Subwoofer
Leave default settings
"