Write interleaved double samples to the stream, from the given buffer inData[0..frames].
Number of actually written frames. Multiply by getNumChannels() to get the number of written samples. When that number is less than frames, it means the stream had a write error. In that case, the isError() flag is also set.
See Implementation
Write interleaved double samples to the stream, from the given buffer inData[0..frames].