Can the soul be channeled directly?

The soul, indeed, can be channeled as can other repositories of consciousness, and anything in existence comprising consciousness can be channeled. While you are envisioning a great widening of possibilities here, for your work as a healer in possibly channeling the soul of clients, for example, we can tell you that it is above your level of awareness and concern, what you would find there. Keep in mind that you are an extension of your soul that is a separate entity, functionally speaking. And while it has much soul knowledge in sharing the aggregate of soul content, much of that is not relevant to human existence in the physical and the trials and tribulations that entails. So while the soul's awareness and knowledge base would be of interest, it would not be of great help to you as a human being to probe in detail.