Tascam has released a free program designed to convert and edit hi-res DSD: DSF, DSDIFF, and PCM/.Wav files.

I don't know anything about it - I've downloaded it to see what potential benefits it might have for me - but I haven't actually used it yet, so don't kill the messenger. I'm posting this strictly as a forum/public service announcement. ;)
- d.t.

Program:
http://Tascam.com/product/hi-res_editor/downloads/

Manual:
http://Tascam.com/content/downloads/products/887/e_Tascam_hi-res_editor_om_va.pdf

(installation note: when I installed it, it seemed to "hang" for a little bit on the "finishing installation" status bar. I was just about to go to Task Manager to manually stop the process, thinking it had frozen, when it did actually finish the install on its own... so be patient at the end of the install, it may take a few minutes.)

For DSD, it supports 2.8, 5.6, and 11.2 MHz, and for PCM/Wav, it will support rates from 44.1kHz up to 384kHz, at 16, 24 and 32 bit. (Further details below)

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From Tascam:

Editing of high-resolution DSD/PCM files possible
•
Supports DSD files at 2.8, 5.6 and 11.2 MHz and PCM
files at 44.1–384 kHz and 16, 24 and 32-bit
•
Supports audio sources with one or two channels
(mono, stereo)
•
Supports Windows (Windows standard and ASIO 2.1
audio drivers)
•
DSD native playback, which allows direct conversion
of DSD to analog, is possible using a TEAC UD-501 or
another DSD-compatible audio device
•
Waveform display is possible and allows intervals
between set IN and OUT points to be converted and
output
•
Short fades can be added at IN/OUT points during file
output (function can be turned on/off )
•
Audio file formats and sampling frequencies, for
example, can be converted
Format conversion: PCM

DSD
Convert sampling frequencies and quantization bit
depths as desired
•
Combine function can be used to join two audio files
•
Editing with just a computer is possible

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FWIW :)
-donny