DS3 recently got his ASD diagnosis at 32 months. The paed described his voice as "sing song". He is becoming more verbal again after several months post regression when he said very little, but his voice seems to be getting much higher in tone (its also less clear than before his regression). I have come across this when reading about ASD but wondered if other children had a very high voice and whether it righted itself or they had any suggestions about how to make him speak lower - we are talking bizarrely high here!