An open source DAW for GNU/Linux, inspired by modular synths.
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<?xml version="1.0"?>
Copyright (c) 2015-2019, Benjamin Niemann <>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
<display-name>Butterworth High-pass Filter</display-name>
<port name="in/left" type="audio" direction="input"/>
<port name="in/right" type="audio" direction="input"/>
<port name="out/left" type="audio" direction="output"/>
<port name="out/right" type="audio" direction="output"/>
<port name="cutoff" type="kratecontrol" direction="input">
<float-control min="0" max="20000" default="2000"/>
<display-name>Cutoff frequency</display-name>
0dbfs = 1.0
ksmps = 32
nchnls = 2
gaInL chnexport "in/left", 1
gaInR chnexport "in/right", 1
gaOutL chnexport "out/left", 2
gaOutR chnexport "out/right", 2
gkCutoff chnexport "cutoff", 1
instr 1
gaOutL butterhp gaInL, gkCutoff
gaOutR butterhp gaInR, gkCutoff
i1 0 -1