If you set an Oscillator with any waveform to fixed mode, the first note outputted will sound like a Sine.
To reproduce:
- Load up a default Operator
- Set the waveform to Square
- Set the oscillator to Fixed
- Play 2 notes
The first note will be a sine, the second will be a square.
If you just hold the first note (so its a sine) and move the frequency, the Sine turns into a Square too.
Osx 10.5.6 / Live 8.0b4