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Creating Free IBM Voice Prompts for FusionPBX/FreeSWITCH

SECURITY ALERT: https://securityboulevard.com/2019/06/rce-using-caller-id-multiple-vulnerabilities-in-fusionpbx/

One of the first things you’ll need if you choose to migrate to FusionPBX and FreeSWITCH is voice prompts. You can record your own in FusionPBX using the Recordings application by dialing *732. Of course, your PBX will probably sound like you recorded your own prompts. 🙂 Our first recommendation is to always direct folks to Allison Smith whose voice prompts for Asterisk are legendary. But, for those on a tight budget, recordings by a professional voice talent may not be a viable option. So, today, we want to deliver the next best thing with synthesized voice prompts that are second to none. For regular readers of Nerd Vittles, you’re already aware of our enthusiasm for IBM’s new TTS offerings. You can try them out for yourself by clicking View Demo here. Or you can sample the Weather Report for 3CX that we uploaded to SoundCloud:


[soundcloud url="https://api.soundcloud.com/tracks/364353344″ params="auto_play=false&hide_related=false&show_comments=true&show_user=true&show_reposts=false&visual=true" width="80%" height="350″ iframe="true" /]

Cost issues aside, other users may need voice prompts for VoIP applications that require a language other than English. With IBM’s TTS offerings, you have quite a selection of voices and languages from which to choose:

There are many occasions where you may want to build IVRs or applications that require custom voice prompts to obtain information from callers such as requests for a name, a phone number, a part number, a location, a department, or many other pieces of data that are used to formulate data base queries. And now there’s a simple, professional, and free way to create these voice prompts using IBM’s TTS platform and FusionPBX. The first million characters of TTS synthesis and the resultant voice files are free every month. That will be more than ample for almost all of our users. To get started, you’ll need to set up a free account with IBM Bluemix and install FusionPBX on a platform of your choice: a dedicated server, a virtual machine on your desktop PC using VirtualBox, or a cloud-based server.

NOV. 1 UPDATE: IBM has moved the goal posts effective December 1, 2018:

Getting Started with IBM Bluemix TTS Service

You can start your free, 30-day trial of IBM Bluemix services without providing a credit card. Just sign up here. Once your account is activated, here’s how to obtain credentials for the TTS service to use with FusionPBX.

Getting Started with FusionPBX

We won’t repeat the tutorial that walks you through installation of FusionPBX. Just follow the steps outlined here. Once your server is up and running, log into your server as root using SSH or Putty. We need to add MP3 support to the SOX application before we can create voice prompts reliably with IBM’s Bluemix TTS service. Here’s how:

apt-get update
apt-get install libsox-fmt-mp3 -y

Installing the Voice Prompts Script for TTS

Now we’re ready to install the Nerd Vittles Voice Prompts script that we’ll use to actually create the custom voice prompts. While you’re still logged into your server as root with SSH or Putty, issue the following commands:

cd /root
wget http://incrediblepbx.com/freeswitch/ibmprompt-fusion.tar.gz
tar zxvf ibmprompt-fusion.tar.gz
rm -f ibmprompt-fusion.tar.gz

Adding Your Credentials to the Script

Using your favorite editor, it’s time to add your IBM TTS credentials to the Voice Prompt script: nano -w ibmprompt.php. Simply replace the x’s in $API_KEY with your credentials from above. If you prefer a different voice for your voice prompts, update the $IBM_voice option using the examples shown below. For example, for the Brazilian Portuguese voice, use $IBM_voice = "pt-BR_IsabelaVoice". Verify that the $IBM_url matches what was provided with your credentials. Once you’ve updated the entries, save the file: Ctrl-X, Y, and ENTER.

Taking Voice Prompts Script for a Test Drive

Now we’re ready to try things out. The syntax while logged into the /root folder looks like this. If creating a prompt in a different language, text should be in native language, not English.

./ibmprompt.php "Text of your voice prompt"

Once the voice prompt is generated, you’ll find voiceprompt.wav in the /root folder. We’ve added a second script to actually move the new voice prompts into place to use with FusionPBX. So, once you’ve created the voice prompt above, issue the following command to assign a prompt name and copy the prompt into your FusionPBX recordings folders. Don’t forget the .wav extension on the prompt name you choose, and don’t put any spaces in the prompt name. Use hyphens.

./ibmprompt-to-fusionpbx prompt-name.wav

Once you have put the recordings in place in FusionPBX, you can edit and play them back within the FusionPBX GUI by navigating to Apps -> Recordings. Enjoy!

Originally published: Wednesday, September 19, 2018


Support Issues. With any application as sophisticated as this one, you’re bound to have questions. Blog comments are a terrible place to handle support issues although we welcome general comments about our articles and software. If you have particular support issues, we encourage you to get actively involved in the PBX in a Flash Forums. It’s the best Asterisk tech support site in the business, and it’s all free! Please have a look and post your support questions there. Unlike some forums, ours is extremely friendly and is supported by literally hundreds of gurus and thousands of users just like you. You won’t have to wait long for an answer to your question.



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