Tips for Phone Audio Files


ENGAGEcx channels and media types that use a phone connection play several audio files to the individual and associate.  Examples include the greeting, on hold, and voicemail prompt.

High quality audio files are recommended.  We also recommend saving your audio files in a format optimized for playback over phone connections.  Specifically, audio files should be saved as 16bit WAV files, sample rate 8 KHz, mono.

In addition to carefully selecting the audio file format, we recommend using most of the available range in the audio file.  You may need to normalize or amplify your audio in a software audio editor to obtain the ideal file.

You should record your audio files using a low-noise source and apply noise removal techniques to obtain as clean an audio file as possible.

How can you do this?

You should start with selecting a good location to record your audio.  Avoid noisy locations and be especially careful to avoid the low hum of your heater or air conditioner.  A small closet may be your best available option.  Surprisingly, draping a small blanket over yourself can yield high-quality results.

Once you have a location selected, you will need recording equipment.  For best results, you should avoid using the built-in microphone from your laptop or cheap computer headset.  At a minimum, select a USB-based headset or microphone.  You can purchase a higher quality USB microphone from Blue Microphones or a similar provider.  There are many excellent digital audio records available on the market as well (e.g. Tascam DR-40).

After recording your audio files, you can use audio editing software to improve your file quality.  Audacity is available from and provides useful features like noise reduction, format resampling, amplification, and silencing.

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