tweak-preset

name	tweak-preset
description	Open or modify a single value in an installed Easy Effects preset JSON file, then reload it. Useful for quick adjustments (autogain target, threshold, gain) without launching the full GUI. For structural edits, use the GUI.

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.