Up to now, getting into 1bit recording was very expensive, i think now that the price is rational, once people hear it and realize that they can store everything in 1bit 5.6mHz and easily convert them to any PCM format very easily with the included software.
The software alone to do 1bit used to cost $2000 and up. The MR-1000 comes with software to convert & playback on your Mac or PC.
The reason that there is no digital in is, if you already have a 1bit converter with a digital out, then you probably are not going to need this unit, so it keeps the price down. The idea is to record pure 1bit, so recording PCM digitally into the unit via spdif is what we are trying to avoid, record 1bit and convert later as needed to any PCM format.
You can drag & drop files to/from the unit via USB 2.0, then use the included Audiogate software to convert you 1bit files to "i.e.-16bit/44.k. or 24bit/192k, etc, etc" and leave your masters untouched at 1bit.
Also, the Audiogate software will sync to your system (core audio, etc) and play 1bit files out of your audio hardware (Audiogate will dither the output to sync with your audiocard). This works either as a standalone or with the MR-1000 plugged in, no need to transfer files to your computer if you do not want to. This works on laptops as a standalone program as well.
Since 1bit recording eliminates the decimation encode and decode filters, it eliminates the "this converter sounds better than that converter" issue.
Typically the weak link in PCM recording is the filtering and algorithms (and available DSP) used to do it.
Actually most AD and DA starts as 1bit, but then has to be run through filters and decimation filters to store the information to conform to PCM, which is from 1981 when storage and throughput was a issue. Since storage & throughput are not as much of a problem anymore, 1bit recording make much more sense now.
Please take a moment and read the AES document that we did that explains the science of PCM & 1bit in a somewhat easy to digest paper.
Link to the article:
1bit recording explained