My Softrock V8.3 has a variable oscillator controlled via a USB I2C Interface to enable band switching/tuning via the PC. The original Dip switches are still visible but they don't do anything. The mute input controls the Softrock receiver from the headphone switcher I built. I use a 7Ah, 12V Yuassa lead acid battery for supplying the softrock.
The IQ output of the sdr is connected to the aux. input on my Creative Audigy Soundcard. I get 48 kHz bandwidth on all bands. The output of the sound card connects to my headphone switch box..