I improved the output level control for digital modes. This removes the lag in attaining 100% level. For the first transmit, Quisk does not know what level to expect from the external digital source, so there may still be a small delay.
I added a squelch feature that works for SSB and FM. Just push the "Squelch" button. The SSB level automatically adjusts for band noise, and the default slider value of 0.200 should be close to what you want.