Add options for speed up algorithms

[DeflateAwning]

My understanding is that there are multiple algorithms to speed up the playback speed of a piece of audio. Audacity, for example, has both a quick mode, and a very slow "high quality" mode.

I'm assuming that Voice currently uses a quick-ish algorithm, which results in the audio becoming a touch distorted and robot-sounding. I'm wondering if there's a way to implement the option to select a more power-intensive/higher quality playback speed change algorithm.

Resources:

• good Medium article that explains the idea of "Time Stretching Algorithms"
• examples of algorithms
• tons of discussion on Stack Overflow, although a lot of it is centered in the user domain (using audio editing softwares)

[PaulWoitaschek]

That's more a topic for https://github.com/google/ExoPlayer as Voice does not implement the playback logic itself.

[PaulWoitaschek]

Turns out this is already supported by exoplayer by some degree. Converting to an Issue 👍
google/ExoPlayer#6575

[PaulWoitaschek]

#1469