Add script used to generate the pitch tables to the repo

1 files changed, 22 insertions, 0 deletions

diff --git a/tools/scripts/gen_pitch_table.py b/tools/scripts/gen_pitch_table.py
new file mode 100644
index 0000000..f83ff3e
--- /dev/null
+++ b/tools/scripts/gen_pitch_table.py
@@ -0,0 +1,22 @@
+import numpy as np
+
+# We consider that samples are pitched with respect to C4 (60).
+audio_freq = 18157
+precision = 17
+interval = 2 ** (1 / 12)
+
+freqz = np.zeros(120)
+freqz[60] = 261.6 / audio_freq
+for i in range(61, 120):
+    freqz[i] = freqz[i - 1] * interval
+
+r = list(range(0, 60))
+r.reverse()
+for i in r:
+    freqz[i] = freqz[i + 1] / interval
+
+if (4294967295 - int(max(freqz) * 2 ** precision * 44100)) < 0:
+    print("Not enough room in u32 for the given precision")
+else:
+    for f in freqz:
+        print("{},".format(int(f * 2 ** precision)))