/// <summary>
/// Triggers a note off event for the Helm instance(s) this points to.
/// Instead of a midi note, uses a frequency measured in hertz.
/// </summary>
/// <param name="frequency">The frequency measured in hertz to turn off.</param>
public void FrequencyOff(float frequency)
{
int number = 0;
pressedFrequencies.TryGetValue(frequency, out number);
if (number <= 1)
{
pressedFrequencies.Remove(frequency);
Native.HelmFrequencyOff(channel, frequency);
}
else
{
pressedFrequencies[frequency] = number - 1;
}
}