... Unnecessary because transitively included.
But each .cpp file still includes its own .h file near the top to ensure
that it compiles indenendently, even if it is reincluded transitively later.
... except Audacity.h
This forces us to make each header contain all forward declarations or nested
headers that it requires, rather than depend on context.
1) When the program detects this, insert zeroes into the recording to keep the
other good parts synchronized.
2) When recording stops, a message box alerts the user, and a label track is
added showing the lost parts, labelled with consecutive numbers.
3) A menu item visible in alpha builds only is added to Tools, to simulate
recording errors at random times and test the reporting feature.
... whenever they really describe the size of a buffer that fits in memory, or
of a block file (which is never now more than a megabyte and so could be fit in
memory all at once), or a part thereof.
The problem from the beginning has been that some parts of the code expected to
receive interleaved buffers from Dither and some expected non-interleaved buffers.
I was trying to keep the changes to a minimum, but it just wasn't possible.
The result is that Dither can now accept any combination of non-interleaved and
interleaved source and destination buffers.
I still want to review every single usage of Dither (and all of the intermediaries)
because I've seen allowances here and there for the lack of Dither returning
interleaved buffers. Since it can now return interleaved buffers, some of that
extra processing can be removed.