Background & Inspiration
Audio reproduction technology (by which I mean "speakers") hasn't fundamentally changed for many years. Yet the obsolescence timeframe of an Audio-Visual Receiver is becoming shorter due to changes in digital technology: SPDIF, HDMI, more channels, etc. Newer technologies are increasingly closed-source. My old analogue amplifier still drives my speakers perfectly, why should I throw it out?
The idea is to prevent the wasteful discarding of obsolete equipment by allowing incremental upgrades. The modular system will be entirely open-source so that any interested person can make their own module to serve their unique needs (or for fun). Eventually I would like to see compatible modules available from multiple vendors (much like Raspberry Pi & Arduino add-ons).