soo N3DT what converter are you interested in? AC5UP gave a link for a DRM converter, which will still need the "Sound Forge" software (FREE).
IW5CI has a youtube showing different converters. He demos an IF converter that gives you a software defined radio (SDR) and he shows how that same converter can receive DRM but the software for DRM is still needed to decode the interference-free, static-free audio. All of the artifacts of shortwave listening, the fading, the distortion, etc is gone. Sounds like FM radio!!!
The latest software from Flex radio (FREE) has the filter for DRM but you still need the DRM software to decode the white noise that you will hear on the air, if tuning and listening with headphones.
The output of either the SDR (SoftRock) board or DRM module go to the sound-card input of your computer and then the magic starts ( and frustration starts) using the software to decode these signals.
info and history of SDRhttp://wb5rvz.com/sdr/
I'm still wrestling with the DRM decoder software for my Flex Radio (SDR1000) and the FlexRadio software.