WIP: Allow better control of audio volume.
With the latest commit, for every audio file, we can change its keyframe values from the Audio Transformation dialog itself. This also supports going through various keyframes (i.e moving front and back), also it gives an option to mute the audio.
Problems to be solved:
- In 'uncontrolled' state, if we are changing the value from the spinbutton, though the audio property changes, its not yet displayed correctly via keyframe curve(which still shows default 1.00 value) and also even though the volume is brought down to zero, when the clip is played, we can still hear the volume.
2. In 'controlled' state, if i type '0.23' in the spin button its taken as '2.3'. (But this is not observed in 'uncontrolled' state).
- If 'Mute' button is pressed, it takes some time for the clip to go mute.