lorisfrqlimit

lorisfrqlimit — Limit the range of frequencies in a Loris analysis.

Syntax

lorisfrqlimit  isrcidx, istoreidx, kLowFrq, kHighFrq

Description

Frequencies below kLowFrq are changed to kLowFrq; frequencies above kHighFrq are changed to kHighFrq; the values between are unchanged.

Initialization

isrcidx is an integer label that identifies the stored set of SDIF partials that are used. Use lorisread to import partials from an SDIF file, store them in memory and assign a label.

itgtidx is an integer label where the partial data created by this opcode will be stored. This label may be subsequently used with any other loris opcode for further transformation or resynthesis with lorisplay. if itgtidx and isrcidx are identical then isrcidx is overwritten.

Performance

kLowFrq is the lower frequency boundary which limits frequencies in istoreidx.

kHighFrq is the higher frequency boundary which limits frequencies in istoreidx.

Credits

The Loris unit generators were written by Kelly Fitz (loris@cerlsoundgroup.org). It is patterned after a prototype implementation of the lorisplay unit generator written by Corbin Champion, and based on the method of Bandwidth-Enhanced Additive Synthesis and on the sound morphing algorithms implemented in the Loris library for sound modeling and manipulation. The opcodes were further adapted as a plugin for Csound 5 by Michael Gogins. Ben Hackbarth (hackbarth@ucsd.edu) wrote the Extended Loris Opcodes.