I recently created a simple google translator based text to speech engine, that calls the google webservice, saves the output mp3 in a temp file then plays it. I use the StreamingMP3Sound class from http://www.squeaksource.com/SPDProjectUpdates/ to play files. Gofer new smalltalkhubUser: 'zeroflag' project: 'PhSpeaker'; package: 'ConfigurationOfPhSpeaker'; load. (ConfigurationOfPhSpeaker project version: #development) load. SoundSystem soundEnabled: true. "enable sounds in Pharo" (PTGoogleTTS language: 'en') readText: 'Hello world'. You can check the ConfigurationOfPhSpeaker for the dependencies, and PTGoogleTTS>>playFile: for playing mp3.