A psychiatrist can be both a sounding board and a specialist in chemistry, depending on the context of your needs and their approach to treatment. Here's how they fulfill both roles:

1. Sounding Board: Psychiatrists are trained medical doctors who specialize in mental health. They often provide psychotherapy (talk therapy) where they listen to patients, help them explore their thoughts and feelings, and offer guidance on coping strategies. In this role, they act as a sounding board, helping patients process their emotions and experiences.

2. Specialist in Chemistry: Psychiatrists also have extensive training in the biological aspects of mental health conditions. They understand how brain chemistry affects mood and behavior and can prescribe medications to help manage symptoms of mental health disorders like depression, anxiety, bipolar disorder, etc. In this capacity, they focus on the "chemistry" aspect by adjusting medications to find the right balance for each patient.

In summary:

• As a sounding board: They provide emotional support through talk therapy.
• As specialists in chemistry: They diagnose conditions and prescribe medications based on an understanding of brain chemistry.

Many psychiatrists integrate both approaches to offer comprehensive care tailored to each patient's unique needs.