docstrings added to functions, types and methods

CHANGELOG first update

pre-commit updated to look in root of repo.

version retraction added to go.mod

README updated to reflect changes

util.go

@@ -12,13 +12,24 @@ func allTrue(s []bool, sz int) bool {
 	return true
 }
 
+// update copies the contents of one float slice into another
 func update(s1 []float32, s2 []float32, sz int) {
 	for i := 0; i < sz; i++ {
 		s1[i] = s2[i]
 	}
 }
 
+// roundFloat rounds a float value to a given precision
 func roundFloat(val float64, precision uint) float64 {
 	ratio := math.Pow(10, float64(precision))
 	return math.Round(val*ratio) / ratio
 }
+
+// convertLevel performs the necessary math for a channel level
+func convertLevel(i float32) float32 {
+	if i > 0 {
+		val := 20 * math.Log10(float64(i))
+		return float32(roundFloat(float64(val), 1))
+	}
+	return -200.0
+}