Modify the volume of the speech.
Normal volume for the first sentence.
(Louder volume for the second sentence)[volume:"x-loud"].
Volume modifier (can be abbreviated)[vol:"soft"].
I can combine (multiple values)[pitch:"low";rate:"slow";volume:"loud";voice:"Brian"] at once.
Possible values:
n/a
Normal volume for the first sentence.
(Louder volume for the second sentence)[volume:"x-loud"].
Normal volume for the first sentence.
Louder volume for the second sentence.
<speak>
Normal volume for the first sentence.
<prosody volume="x-loud">Louder volume for the second sentence</prosody>.
</speak>
<speak>
Normal volume for the first sentence.
<prosody volume="x-loud">Louder volume for the second sentence</prosody>.
</speak>