He is alone when I am away, but I have given him a mp3 player and speaker, subwoofer that plays for him while I'm away. In the morning, I try to spoon feed him oatmeal/mash mix and then I put foraging items such as almonds, dried papaya, pine nuts with the shell in one of those enrichment wood foraging blocks. He usually gets some spray millet hanging, and he also gets a bowl of fresh fruit and vegetables and sprouts. (I usually include pomegranate seeds, fresh corn, snap peas, carrots, jicama, etc.) He also makes this noise when I feed him from a spoon. (My camera is charging right now so I haven't been able to record the sound...will do it asap)
He seems happy (I have heard him play by himself, making little activity courses as he goes around his cage), but I have noticed that when he sees me, he stops whatever he is doing and wants to come out with me. This has only started about 2 days ago. His poop looks normal and his feathers look and feel normal.