DTMF Decoder

DTMF Decoder is a cool tool that helps you process dial tones made by touch-tone phones. It can even log the phone numbers for you! This software captures tone signals from the telephone line or radio receivers, and then sends them to your computer's soundcard for processing.

How Does DTMF Decoder Work?

This app works by identifying sounds it captures and figuring out their frequencies. It connects these sounds to specific keys on the phone's number pad. That means it can tell you what phone number was dialed and when the call happened!

Setting Up Your Audio Device

Before you dive in, you'll want to set up your audio capture device first. You might use something like a microphone that your computer already has. Plus, don’t forget to tweak those audio mixer settings!

Main Window Features

The main window of DTMF Decoder shows two green bars that are busy capturing incoming tones. Each bar covers different frequency ranges. To make sure everything runs smoothly, you need to adjust a threshold marked by a red line. A tone is considered valid if it goes beyond this threshold by about 6 dB.

Volume Changes Matter

If you change the volume settings on your soundcard, remember that you'll have to readjust the threshold again since captured tones will sound different.

Test Example and Configuration

No worries if you're new to this! DTMF Decoder comes with a test example so you can see how it works and learn how to use it effectively. You can also set up the minimum tone and break time as needed.

Saving Your Data

The best part? Any data you capture is automatically saved into a text file right on your computer for easy access later!

Who Can Use DTMF Decoder?

This nifty tool is great for audio technicians and forensic experts who need to detect dialed phone numbers. Getting everything set up isn't too tricky, especially if you've got some experience in this area.

If you're ready to give it a shot, check out DTMF Decoder here!