Back in November 2020 Don Lewis discussed his time programming the Yamaha DX7’s factory sounds. In the wake of Don’s passing, we decided to publish this excerpt and put on record his important contribution to this iconic synth.
Comprised of an 18dB/octave three‑pole multi‑mode filter, a VCA, two different West Coast‑style wavefolders and a rectifier, at its mildest end the FIL4 very much does what it says on the tin: it sculpts timbre.