Harvest Moon: Save the Homeland

After you get your Dog up to one heart, head to Maple Lake during the day and hope that Louis will be there. Should he be there already by the time you zone in, a scene will play where he is playing on the recorder (Flute) with some birds as an audience. This is the unlock scene for getting your very own recorder (It's technically a recorder, but it is listed as a Flute).

In order to get your dog to listen to your commands with the "Flute," first equip it by switching to it in the Tools section. Then press to hold it. You can play it by holding and using any of the directional buttons to create a small melody. The dog might not follow the command at first, but simply repeat the pattern and he will eventually obey.

Commands:
Jump :
Sit Up :
Sit :
Lay Down :
Heel :
Herd Animals :

*Herding seems to only be possible when the cows have a high enough love for you (possibly level 4) so using this might not be conducive unless you have invested a lot of time into them.