SSB Modulator
Implemented a SSB modulator. Look for the "SSB Modulator" plugin.
It does USB/LSB (by reversing the filter limit similarly to the SSB demodulator) and also DSB. It can optionally use binaural input i.e. I and Q samples are taken from the left and right stereo channels (or reversed). In DSB with binaural setting in Tx and Rx this effectively transmits in stereo.
CW keyer
Implemented a CW keyer for the SSB, AM and NFM modulators. You can enter the text that will be keyed in Morse code at speeds from 1 to 26 WPM (Words Per Minute). You can also send a series of dots or dashes. Transitions are smoothed with a 4 ms ramp that follows the smootherstep function f(x) = 6x⁵ - 15x⁴ + 10x³ This function has zero first and second derivatives at 0 and 1. This reduces the "clicking" efficiently and in turn reduces the spectrum splatter very significantly.