nx_audio_fx.nx

nx_audio_fx.nx -- SOVEREIGN AUDIO ENGINE rung R5: effects (filter + delay). fx_lowpass: one-pole low-pass (y += alpha*(x-y), Q8 alpha; 256 = passthrough) -- smooths high frequencies / harshness, the basis of tone shaping. fx_delay: feedback echo (out[n] += fb*out[n-delay]) -- the basis of echo/reverb and a space sense. Pure integer recursion, reuses ae_clamp (R0). license_tier: ORIGINAL.