I released a new version of my python KiwiSDR sound client. This update adds an --echo option to also echo the sound to the default sound output device.
Based on the kiwiclient python script, this script will connect to a local or remote KiwiSDR, and stream the audio to a virtual audio device on your computer in real time, so you can route it to a decoding program, such as for SSTV, FAX, RTTY, and so on.
Downloads and more info:
https://www.blackcatsystems.com/software/kiwiSdr-sound-client-virtual-audio-device.html