Code sample of a D.py function to perform TTS using pico2wave

link.sh

ln -s /dev/stdout ./stdout.wav

tts.py

    async def tts(self, message, stripped, server):
        # command: espeak --stdout "hello world" | ffmpeg -i pipe:0 out.ogg
        caller = message.author
        guild = message.guild

        if 'off' not in server.roles and not caller.guild_permissions.manage_guild:
            for role in caller.roles:
                if role.id in server.roles:
                    break
            else:
                await channel.send('You aren\'t allowed to do this. Please tell a moderator to do `{}roles` to set up permissions'.format(server.prefix))
                return

        if caller.voice is None:
            await channel.send('You aren\'t in a voice channel.')

        elif not caller.voice.channel.permissions_for(guild.me).connect:
            await channel.send('No permissions to connect to channel.')

        else:
            try:
                voice = await caller.voice.channel.connect()
            except discord.errors.ClientException:
                voice = [v for v in self.voice_clients if v.channel.guild == guild][0]
                if voice.channel != caller.voice.channel:
                    await voice.disconnect()
                    voice = await caller.voice.channel.connect()

            if voice.is_playing():
                voice.stop()


            s = subprocess.Popen(['pico2wave', '-w', 'stdout.wav', '"{}"'.format(stripped)], stdout=subprocess.PIPE)
            s2 = subprocess.Popen(['ffmpeg', '-i', '-', '-f', 's16le', '-ar', '48000', '-ac', '2', '-loglevel', 'warning', 'pipe:1'], stdin=s.stdout, stdout=subprocess.PIPE)

            voice.play(discord.PCMAudio(s2.stdout))