Markus Gritsch wrote an alternative firmware for his HybridSID device. It can now act as a "Network SID Device" and can be used as the sound output device for ACID 64 and GoatTracker. When the HybridSID works together with ACID 64 you will have support for the RSID format and the music is played cycle exact. The HybridSID is a open source project, the schematics and firmware are available to build your own device.