Cthulhu is no longer a fork. Now it is a screen reader written in Golang.

internal/sound/indentation.go

@@ -0,0 +1,25 @@
+// Copyright (c) 2026 Storm Dragon
+// Authors: Storm Dragon, Angus Kola
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package sound
+
+import (
+	"strconv"
+	"strings"
+	"time"
+)
+
+const indentationCuePrefix = "generated-indentation-tone:"
+
+func IndentationCueName(frequency int) string { return indentationCuePrefix + strconv.Itoa(frequency) }
+func indentation_frequency(name string) (int, bool) {
+	if !strings.HasPrefix(name, indentationCuePrefix) {
+		return 0, false
+	}
+	frequency, err := strconv.Atoi(strings.TrimPrefix(name, indentationCuePrefix))
+	return frequency, err == nil && frequency >= 100 && frequency <= 2750
+}
+func indentation_tone_wav(frequency int) []byte {
+	return tone_wav(float64(frequency), 150*time.Millisecond, .7, 5*time.Millisecond)
+}