script i use to turn a folder of samples into a decentsampler dslibrary

dssamplegroupfmt.py

import argparse
import pathlib
import os
import sys
import shutil
from xml.dom import minidom
from string import Template

# {{{1 boilerplate
boilerplate = Template(
    """<?xml version="1.0" encoding="UTF-8"?>
<DecentSampler minVersion="1.0.0">
  <ui width="812" height="375" layoutMode="relative"
      bgMode="top_left"
      bgImage="$bg_img">
    <tab name="main">
      <labeled-knob x="445" y="75" width="90" textSize="16" textColor="AA000000" 
                    trackForegroundColor="CC000000" trackBackgroundColor="66999999" 
                    label="Attack" type="float" minValue="0.0" maxValue="4.0" value="0.01" >
        <binding type="amp" level="instrument" position="0" parameter="ENV_ATTACK" />
      </labeled-knob>
      <labeled-knob x="515" y="75" width="90" textSize="16" textColor="AA000000" 
                    trackForegroundColor="CC000000" trackBackgroundColor="66999999" 
                    label="Release" type="float" minValue="0.0" maxValue="20.0" value="1" >
        <binding type="amp" level="instrument" position="0" parameter="ENV_RELEASE" />
      </labeled-knob>
      <labeled-knob x="585" y="75" width="90" textSize="16" textColor="AA000000" 
                    trackForegroundColor="CC000000" trackBackgroundColor="66999999" 
                    label="Chorus" type="float" minValue="0.0" maxValue="1" value="0" >
        <binding type="effect" level="instrument" position="1" parameter="FX_MIX" />
      </labeled-knob>
      <labeled-knob x="655" y="75" width="90" textSize="16" textColor="FF000000"
                    trackForegroundColor="CC000000" trackBackgroundColor="66999999"
                    label="Tone" type="float" minValue="0" maxValue="1" value="1">
        <binding type="effect" level="instrument" position="0" parameter="FX_FILTER_FREQUENCY"
                 translation="table" 
                 translationTable="0,33;0.3,150;0.4,450;0.5,1100;0.7,4100;0.9,11000;1.0001,22000"/>
      </labeled-knob>
      <labeled-knob x="725" y="75" width="90" textSize="16" textColor="AA000000" 
                    trackForegroundColor="CC000000" trackBackgroundColor="66999999" 
                    label="Reverb" type="percent" minValue="0" maxValue="100" 
                    textColor="FF000000" value="50">
        <binding type="effect" level="instrument" position="2" 
                 parameter="FX_REVERB_WET_LEVEL" translation="linear" 
                 translationOutputMin="0" translationOutputMax="1" />
      </labeled-knob>
    </tab>
  </ui>
  <groups attack="0.000" decay="25" sustain="1.0" release="0.430" volume="-3dB">
        $samples
  </groups>
  <effects>
    <effect type="lowpass" frequency="22000.0"/>
    <effect type="chorus"  mix="0.0" modDepth="0.2" modRate="0.2" />
    <effect type="reverb" wetLevel="0.5"/>
  </effects>
  <midi>
    <!-- This causes MIDI CC 1 to control the 4th knob (cutoff) -->
    <cc number="1">
      <binding level="ui" type="control" parameter="VALUE" position="3" 
               translation="linear" translationOutputMin="0" 
               translationOutputMax="1" />
    </cc>
  </midi>
</DecentSampler>
""") #}}}1


default_bg = pathlib.Path("bg.png")
args = argparse.ArgumentParser()
args.add_argument("--folder",type=pathlib.Path)
args.add_argument("--startnote",type=int,default=0)
args.add_argument("--bg",type=pathlib.Path,default=default_bg)
args.add_argument("--name",type=str,default="UntitledDecentSamplerLib1")
args.add_argument("--overwrite",choices=["yes","no"],default="no")
ns = args.parse_args()
if not ns.folder:
    print("supply --folder arg")
    sys.exit()
if not ns.folder.is_dir():
    print("--folder arg must point to dir")
    sys.exit()
newlibdir = pathlib.Path(ns.name)
overwrite = ns.overwrite == "yes"
if newlibdir.is_dir() and not overwrite:
    print(newlibdir,"already exists. use --overwrite=yes to force")
    sys.exit()
else:
    newlibdir.mkdir(exist_ok=overwrite)
    print("created",newlibdir)
for path in ns.folder.iterdir():
    if path.suffix == ".wav":
        shutil.copy(path,newlibdir)
shutil.copy(ns.bg,newlibdir)
sample_list = [p for p in newlibdir.iterdir() if p.suffix==".wav"]
print("sample_list:",sample_list)
sampledocfrag = minidom.Document()
rootelem = sampledocfrag.createElement("group")
notenum = ns.startnote
for sample in sample_list:
    elem = sampledocfrag.createElement("sample")
    elem.setAttribute("path",sample.name)
    elem.setAttribute("loNote",str(notenum))
    elem.setAttribute("hiNote",str(notenum))
    elem.setAttribute("rootNote",str(notenum))
    notenum += 1
    rootelem.appendChild(elem)
samplexml = rootelem.toprettyxml().strip()

mapping = dict(bg_img=str(ns.bg),samples=samplexml)
filecontents = boilerplate.substitute(mapping)
dspresetfile = newlibdir / (ns.name + ".dspreset")
with open(dspresetfile,"w") as f:
    f.write(filecontents)
print(filecontents,"written to",dspresetfile)