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Hello community,<div><br></div><div>Having trouble getting my lagrange 4-point interpolator to function properly. Harmonics are being generated from somewhere, possibly due to the amplitude exceeding FSD (DC offset?). When I then include it in my waveguide, as soon as DSP is enabled, pd beeps, and then leaves crackly noise/fuzz regardless of whether the patch is being fed an audio signal or not. Remove the FIR filters, and it functions again as normal.<br><br>Interested to know how others have achieved fractional delay filters within pd, be it Lagrange or Thiran Allpass for example.</div><div><br></div><div>Patch is attached, "FIRTest.pd" is the parent patch.<br><br>Any help would be greatly appreciated.<br><br>Aaron</div> </div></body>
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