So... My head is spinning because I am tired of whistling, but I'll be able to say that I've finished Transhumance!
The art, environment and effects sure are lovely and original, but sadly I can't say you created a very user-friendly experience. I know you are still in alpha and microphone-related features are a hard thing to deal with, but here are a couple of things I thought about while experiencing the game :
-It would be really helpful, on the title screen, if there was something explaining that each note is related to a specific pitch. Because of their shape, I first thought there were patterns!
-Maybe the most important one: I would be very helpful if there actually was a way to hear what is the pitch of each note. I think I also have a bad microphone, but most of the time I was just making random notes to hopefully find the ones I was looking for, and I wasn't very precise so doing it again was a hard task.
-I guess the whistle is an important feature of the game (and it indeed feels like I am giving orders to my cattle with it, even if it took 2 minutes per instruction), so making it optional to allow the player performing the notes in a way or another with the controller may not be a feature you want to consider. But I am thinking about all the players that don't know how to whistle (they actually exist) that can't really play your game because of it... Though it is good to see that you thought about the less musicians of us by highlighting the notes the mic detects!
-I am complaining about all the whistling stuff, but that is because I struggled as hard as I could to keep my cattle following me (although the creatures' animation tend to be glitchy when I gather them, like only making hops instead of walking like they used to). However, it seems that nothing asked me to do so, there's no reward for it. I feel like I could have walked all the way without them and it would have just saved me some breath... Either it lacks some direct feedbacks or I missed something at a time or another. And, while I am at it, I also don't see the point in stopping them.
-Finally, back at the title screen, wouldn't it be better if you allowed the player to skip the "whistle all the notes" phase that is already quite painful to begin with?
Sorry if I am a bit harsh on this one. That's because, even after all this and looking back at it, I think I actually enjoyed the experience. But it would be too bad if I was the only one because nobody wants to make a sufficient effort. This is obviously a niche game, with its very slow pace, so don't restrain to much of the few players you could have!
Best of luck for the next steps of development!
PS: And if you're angry of what I said because I totally missed the point of your game and/or is making easy criticism, you can take your revenge by playing Oneiros -I'm from the Team Fireplace :P-, I know it is also very far from perfect!