We can provide GSM format prompts for free (regrettably, re-distribution is prohibited by the recording company, but we can distribute it for you upon your request).

We also sell the same prompts in a high quality format (uLaw).

If you are interested in using our Japanese prompts and patch, please send your contact information to us by E-mail.

Here is the source code: g722encoder.tar.gz And this is the script i use to convert the files all at once: binsh.

Projects Asterisk DIY Programming About Asterisk Recording voice prompts with Audacity and SOX Asterisk comes with an extensive set of voice prompts in many languages but there are situations where you may need to record your own voice prompts.

I use Audacity and SOX to record and convert the voice prompt files.

I use Linux, so I did not test this method with Audacity for Windows.

Also, i know that you can export in ULAW,ALAW and GSM format directly with Audacity, but I did not test that either.

Recording your own custom voice prompts If you have, or know someone with a good voice, you can record your voice prompts yourself with a microphone of decent quality.

They usually charge you by the word and send you back the recording in WAV format.

June Wallack (french, english) Allison Smith (english) personally, I use an online text to speech (tts) synthesizer to produce the prompts i need.

I just record the output from the sound card for each prompts and put them together in a master file.

By the way, yes, i am aware that you can use a TTS with Asterisk.

I tried a few but did not find one of sufficient quality in french.

You can use these online TTS: ispeech.org IBM watson - tts demo Recording with audacity Make sure the audio track rate is 16000 Hz and also set the project rate to 16000 Hz.

Batch exporting with Audacity It is possible to export multiple parts of a file at once with Audacity.

First, you need to select the part that you want to export and press CTRLB or go to Tracks Add label at selection.

Then give a name to the label, Audacity will use this name to create the individual files.

You can adjust the start and end position of the label later by using the handles on the label track.

I usually leave 60 milliseconds of silence before and after the prompts.

If it is at the end of a sentence, you can leave 100 ms after.

For digits, you may need a shorter silence before and after to make it sound good when they are played back to back.

For example, lets say that i need three prompts: The current temperature is, minus and 15.

To test the silence delay, I copy and paste the three prompts together in another file and play it back.

Click on File Export multiple Select Other uncompressed format in export format.

Next, click on Options Select Raw (header-less) and Signed 16-bit PCM.

Click OK and then, Export Audacity will export each segment defined by labels to a.raw file at the location you specified.

Asterisk Voice Prompts