Reader Xavier Hosxe sends word about a new DIY synth project, preenFM. preenFM is an open source and open hardware project that lets you build a hardware FM synth module. Features: 9 different FM algorithms with up to 6 operators Each operator includes a pair of oscillator and ADSR envelope Oscillator : 7 waveforms (4 sin variation… Read More New DIY FM Synthesizer – preenFM