diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..010fa14
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,16 @@
+# Vendored deps / envs
+ace-step/
+basic-pitch-env/
+.cache/
+*.venv/
+__pycache__/
+*.pyc
+
+# User data
+input/
+output/
+
+# Editor
+.vscode/
+.idea/
+*.swp
diff --git a/batch_generate.py b/batch_generate.py
new file mode 100644
index 0000000..3236dd5
--- /dev/null
+++ b/batch_generate.py
@@ -0,0 +1,59 @@
+"""Batch generation script — 100 outputs across instruments and parameter permutations."""
+
+import subprocess
+import sys
+import itertools
+import random
+
+import os
+BASE = os.path.dirname(os.path.abspath(__file__))
+PYTHON = os.path.join(BASE, "ace-step", ".venv", "Scripts", "python.exe")
+SCRIPT = os.path.join(BASE, "hum2inst.py")
+INPUT = os.path.join(BASE, "input", "bum bum bum [2026-04-10 230403].wav")
+OUTPUT = os.path.join(BASE, "output", "batch-bumbum")
+
+instruments = ["piano", "guitar", "saxophone", "violin", "flute",
+               "cello", "trumpet", "organ", "marimba", "harmonica"]
+
+# Parameter combos: (strength, guidance)
+param_combos = [
+    (0.2, 5.0),
+    (0.3, 5.0),  # our best default
+    (0.4, 5.0),
+    (0.3, 7.0),
+    (0.3, 3.0),
+]
+
+# 10 instruments x 5 param combos x 2 takes = 100 outputs
+takes_per_combo = 2
+
+count = 0
+total = len(instruments) * len(param_combos) * takes_per_combo
+print(f"Generating {total} outputs...")
+
+for instrument in instruments:
+    for strength, guidance in param_combos:
+        seeds = [random.randint(0, 2**31 - 1) for _ in range(takes_per_combo)]
+        for seed in seeds:
+            count += 1
+            print(f"\n[{count}/{total}] {instrument} str={strength} guide={guidance} seed={seed}")
+            cmd = [
+                PYTHON, SCRIPT, INPUT,
+                "--instrument", instrument,
+                "--output", OUTPUT,
+                "--strength", str(strength),
+                "--noise-strength", "0.0",
+                "--guidance", str(guidance),
+                "--seed", str(seed),
+            ]
+            result = subprocess.run(cmd, capture_output=True, text=True)
+            # Print just the output/log lines
+            for line in result.stdout.splitlines():
+                if "Output saved" in line or "Run log" in line:
+                    print(f"  {line.strip()}")
+            if result.returncode != 0:
+                err_lines = [l for l in result.stderr.splitlines() if "ERROR" in l]
+                for l in err_lines:
+                    print(f"  FAILED: {l.strip()}")
+
+print(f"\nDone! {count} outputs in {OUTPUT}/")