sigma studio ,Subharmonic Synth

Hello,

It depends upon which SigmaDSP you're working with. Each family has its own compiler and set of SigmaStudio blocks -- they're generally quite consistent across families, but not all blocks are available for every SigmaDSP. The Sigma100 family (ADAU1701, etc.) has both Sub-Harmonic Synths available. The ADAU1761 as well as Sigma200 (-144x) DSPs feature only the general Sub-Harmonic Synth. Sigma300 (-145x) chips have none so far (as of SigmaStudio 3.14):

If you're using one of the chips for which only the general Sub-harmonic Synth is available, perhaps placing it in the "woofer" path from a crossover might achieve the desired effect:

Best regards,

Bob