Issue with SoftwareSerial (Arduino 1.0+)

Projects Networking, Protocols, and Devices
2 
	if (Serial.available())
	{
		input = Serial.read();
		MIDI.write(input);

If there is something available to read, read it, and send it to the other port.

		input = MIDI.read();
		Serial.println(input, DEC);

Then, regardless of whether there is anything to read, read it and send it to the other port.

Why?