tweak-preset

tweak-preset

Inputs

• preset_name — installed preset (no .json).
• channel — input | output. Default input.
• path — dot-path into the JSON, e.g. output.autogain.target or input.compressor.threshold.
• value — the new value (number, bool, or string).

Steps

1. Locate the preset file

if command -v easyeffects >/dev/null 2>&1; then
  EE_DATA="${XDG_CONFIG_HOME:-$HOME/.config}/easyeffects"
  EE_RUN="easyeffects"
elif flatpak info com.github.wwmm.easyeffects >/dev/null 2>&1; then
  EE_DATA="$HOME/.var/app/com.github.wwmm.easyeffects/data/easyeffects"
  EE_RUN="flatpak run com.github.wwmm.easyeffects"
else
  echo "Easy Effects not installed."; exit 1
fi
F="$EE_DATA/$channel/${preset_name}.json"
[ -f "$F" ] || { echo "Not found: $F"; exit 1; }

2. Show the user what's there now

python3 -c "
import json,sys
d=json.load(open('$F'))
keys='$path'.split('.')
v=d
for k in keys: v=v[k]
print('Current value:', v)
"

If the path doesn't resolve, surface the structure (top two levels) so the user can correct the dot-path:

python3 -c "
import json
d=json.load(open('$F'))
def walk(d,prefix=''):
  if isinstance(d,dict):
    for k,v in d.items():
      p = f'{prefix}.{k}' if prefix else k
      if isinstance(v,(dict,list)): walk(v,p)
      else: print(p, '=', v)
walk(d)
" | head -60

3. Apply the edit (with backup)

cp "$F" "$F.bak"
python3 - <<PY
import json, sys
d=json.load(open("$F"))
keys="$path".split(".")
*head, last = keys
node = d
for k in head: node = node[k]
# coerce numeric/bool from string
raw = "$value"
try:
    new = json.loads(raw)
except Exception:
    new = raw
node[last] = new
json.dump(d, open("$F","w"), indent=4)
print("Set", "$path", "=", new)
PY

4. Reload

$EE_RUN -l "$preset_name"

5. Offer the next step

• Run test-input-level (input channel) to verify the change does what the user expected.
• Run export-presets to back the change up to the library.
• If the change was bad, restore from $F.bak and reload.