Load a bank asynchronously (from in-memory data, out-of-place).
NOTE: Banks loaded from in-memory with out-of-place data must be unloaded using the standard UnloadBank function (with no memory pointer). Make sure you are using the correct UnloadBank(...) overload
Use this overload when you want to manage I/O on your side. Load the bank file in a buffer and pass its address to the sound engine, the media section of the bank will be copied into the specified memory pool. In-memory loading is out-of-place: the buffer can be released after the callback function is called. The advantage of using this over the in-place version is that there is no duplication of bank structures. A bank load request will be posted to the Bank Manager consumer thread. The function returns immediately.