/**
* <summary>
* Starts the preprogrammed playing sequence and run it once only.
* <para>
* </para>
* </summary>
* <returns>
* <c>0</c> if the call succeeds.
* On failure, throws an exception or returns a negative error code.
* </returns>
*/
public virtual int oncePlaySeq()
{
if (_func == null)
{
throw new YoctoApiProxyException("No Buzzer connected");
}
return(_func.oncePlaySeq());
}