Using AI to create a multi-lingual answering machine announcement for your FRITZ!Box

Recording a message, even in a single language, can be difficult. Many of us cringe at the sound of our own voice played back to us. Furthermore, it takes practice to record a message without interruptions while maintaining a steady pace and clear enunciation.

The complexity multiplies when you’re looking to create a multi-lingual answering machine announcement. Fortunately, AI is making this a lot easier than it used to be.

Write the text for the announcement

An answering machine on a FRITZ!box typically allows you to record 3 types of messages:

  1. A greeting for the “Record messages” operating mode.
  2. A “goodbye message” that plays when the caller reaches the maximum recording time.
  3. An announcement for the “Greeting only” operating mode, where callers cannot leave a message.

Start by writing the message(s) in your native language. If you’re not sure what to write or if you want to be particularly funny or obnoxious, you can always ask ChatGPT for help. Here’s a suggestion:

Hey, you've reached my voicemail. I'm currently on vacation and as unreachable as your dream of becoming a millionaire. I'll be back soon, so try again later. Cheers, you ambitious bugger!

Translate the announcement

If you need help with the other language versions, use DeepL translator, Google Translate or similar websites to translate the text:

Use ElevenLabs Voice AI for voice synthesis

If you want your announcement to sound like a robot, click on the speaker icon in Google Translate and record the output (actually it does not sound that bad anymore, so this may have become a viable option). However, for the highest-quality, human-like voice synthesis and a choice of different voices, there’s currently no better option that Prime Voice AI by ElevenLabs.

In my experience, some voices sound better for certain languages than others. However, Prime Voice AI is evolving rapidly, so I won’t go into details as they will be quickly outdated.

Download recordings of your translated texts in all the desired languages (these will be MP3 files):

ElevenLabs Prime Voice AI


If you’re creating an announcement for personal rather than business use, consider making it clear to the caller that they’ve reached the right person, even if the recording doesn’t sound like you. On the other hand, if you like to confuse people, this could be a great opportunity.

ElevenLab’s free plan requires “attribution to”, though I’m not sure how this would work with a pure audio recording. Perhaps you could incorporate it into your message, something like: “This is Adam from I’m sorry, but <your name> cannot pick up the phone right now…”

Processing the audio files in Audacity

Open Audacity and drag-and-drop the MP3 files you downloaded from ElevenLabs. They will appear as separate tracks:

Audacity window with 3 tracks

Normalize the clips (when using different voices)

If you notice a significant volume discrepancy between the tracks, normalize them first to even out the volume levels before you combine them. Normalizing will ensure that each individual track reaches its maximum volume level without distortion.

  1. Press Ctrl+A to select all the tracks or go to “Select” > “All”.
  2. Go to “Effect” > “Volume and Compression”> “Normalize”.
  3. I’ve found that the normalizing to -3.0 dB works well for the FRITZ!box. Click “Apply”.

Move the clips to one track

You may want to “Zoom out” (Ctrl + 3) to make this easier. Then grab the clip you want to move at it’s light-colored area at the top and drag it onto the top track (behing the clip that is already on the track, leaving some room for a pause, if required). Repeat this process for the remaining clip(s).

If you want, you can now delete the empty tracks by clicking on the ‘x’ at the top left of each track.

Audacity will 3 clips on the same track

Export in the best format for the FRITZ!box answering machine

Your FRITZ!Box will likely prefer recordings in WAV format, 8000 Hz, 16-bit, and mono. However, it’s best to confirm this in your device’s manual or the FRITZ!box knowledge base.

The MP3 file downloaded from Elevenlabs should already be mono. If not, go to “Tracks” > “Mix” > “Mix Stereo Down to Mono”.

When exporting the file as “WAV (Microsoft) signed 16-bit PCM”, Audacity automatically converts the bit depth to 16-bit, regardless of your project’s current setting. So, there’s no need to change this.

However, we need to change the sample rate to 8000 Hz. One way to do so is by resampling the track:

  1. Go to the “Tracks” menu at the top of the screen.
  2. In the dropdown menu, select “Resample…”.
  3. In the “Resample” dialog box that pops up, enter “8000” in the “New sample rate (Hz)” field.
  4. Click “OK” to apply the changes.

Now, you can listen to the announcement at the much lower sample rate to get an idea of how it’ll sound to your callers.

Finally, go to “File” > “Export” > “Export as WAV”. In the dialog box that appears, enter your desired file name, make sure “WAV (Microsoft) signed 16-bit PCM” is selected as the type, and click “Save”.

If you also want to preserve your Audacity project file, press Ctrl + S or go to “File” > “Save Project”.

Import the audio file into your Fritz!box

The process of setting up an answering machine on your FRITZ!Box may vary based on your specific model and firmware. However, within the answering machine’s settings, you should find an option to use your own announcement instead of using the standard greeting. Here, choose the .WAV file that you exported from Audacity:

For further information, please search for “Configuring Your Own Greetings” in the FRITZ!box knowledge base.