IO‑Instruments Euporie IO‑Instruments Euporie: 12HP, +12V 70mA, ‑12V 70mA.Regular readers of the Modular column will know that IO‑Instruments sent me a box of modules which I’ve slowly been getting acquainted with. So far, I’ve reviewed the Himalia Penta Sound Source and the Sponde 12‑channel mixer. This month, it’s the turn of the Euporie ‘multi‑response’ analogue low‑pass filter. ‘Multi‑response’ refers to the fact that the resonance can be switched between a Moog and Sallen & Key characteristic, giving you two filters for the price of one. This is done with IO‑Instruments’ usual focus on affordability without compromise and, as I found with their other modules, there are some nice extras thrown in.