Phosphor is a SID player for macOS, Windows and Linux, developed by Marcin Spoczynski. It supports playback via multiple engines: USBSID-Pico hardware, software emulation, Ultimate II+ cartridges and Commodore Ultimate 64 (network playback).

This update adds an oscilloscope visualizer, tracker style view in the SID panel, STIL.txt support, Ultimate64 native playback visualisation, Commodore Ultimate/Elite audio streaming, It also improves multi-SID support (2SID/4SID) tunes.