As we have seen in earlier chapters, the strength of the ‘analog revival’ came as a surprise to most of the major instrument manufacturers, whose main and much delayed response was simply to reintroduce analog- style front-panel controls to some of their existing digital synthesizer designs. But for those manufacturers who did wish to offer some analogstyle product without the cost and potential unreliability of using genuine analog circuitry, the ‘virtual analog’ synthesizer became the obvious solution.