Add support in TTS for volume and panning control of the synth output
Add two new parameters that are used when synthesizing text and
playing it back directly to control the volume and left-right
panning of the output.
Panning is applied using a balance law, which is not energy-preserving
but which doesn't lower the volume when not panning / panning to
center (legacy behavior).
Reduced amount of logs, and removed spoken text.
In TextToSpeech.java: added convenience method to handle the setting
of the cached synthesis parameters.
Change-Id: I235d3d3193283ccc1891e2065d43787e3f63304d
4 files changed