Reduce the virtual resolution to match the actual resolution, and set
the analyzere frequency to Nyquist of the audio input, as it seems to
behave as if the entire range of the input FFT bands are up to the
specified frequency, rather than half of it. Otherwise, we lose half of
the frequency range provided by the input data.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
Improvement includes greatly reducing the CPU usage by not using an
NSImage based painting system.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
Borrowing some DFT code from deadbeef, this implements a simple spectrum
visualization into the main toolbar of the app.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
Christopher Snowhill