volume and the espeak module

[Jonathan Duddington]

On 11 Aug, Chris Brannon <cmbrannon79 at gmail.com> wrote:

> The header file that comes with the eSpeak library claims that the
> synthesizer's volume setting is in the range 0 to 100, and that's the
> range used by Speech Dispatcher's espeak module. The help document
> for the espeak command-line tool says that the volume is in the range
> 0 to 200, and these values would seem to be the correct ones.

100 is the normal full-volume.
Values greater than 100 may introduce amplitude compression in the
audio data.

I will amend the comment in the speak_lib.h header file.

Generally, you should use a default value of 100, so it's OK to allow a
range of 0 to 200 (or even greater of you use a non-linear scale).  You
can probably get to about 400 before distortion becomes a problem.