Technical guide · 3CX

Convert audio to 3CX format

For IVR prompts and on-hold music to work on 3CX at high quality and without errors, audio files must be in the compatible format: a WAV file with PCM encoding, 8000 Hz sample rate, 16-bit depth, and a single (Mono) channel. This guide explains the spec and conversion steps — and ECOLOR’s team is ready to set up your voice prompts professionally.

Required format: WAV / PCM · 8000 Hz · 16-bit · Mono. Any other format may be rejected or play at poor quality on 3CX.

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WAV (PCM)
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Mono
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01 · Definition

What is the 3CX-compatible audio format?

3CX requires voice files (IVR prompts, voicemail, on-hold music) to be in a specific format: a WAV file with PCM encoding, an 8000 Hz (8 kHz) sample rate, 16-bit depth, and a single Mono audio channel.

If you upload a file in another format (such as MP3, or a 44100 Hz WAV, or stereo), the system may reject it or play it at poor quality or the wrong speed. So the file must be converted to the correct spec before uploading.

02 · Why it matters

Why converting to the correct format matters

Guaranteed compatibility

The correct format is accepted directly in 3CX with no upload error messages.

Clear audio quality

Correct encoding ensures prompts play clearly with no distortion or noise.

Correct playback speed

An 8000 Hz rate prevents audio from playing at the wrong speed or pitch.

Professional to the customer

Professional IVR prompts and on-hold music reflect well on your company.

03 · Spec & steps

Required spec and conversion steps

Convert your file to the following spec using any audio editor (such as Audacity):

Format: WAV
Encoding: PCM
Sample rate: 8000 Hz
Bit depth: 16-bit
Channels: Mono
1) Open the file in the audio editor
2) Set the channel to Mono
3) Set the rate to 8000 Hz
4) Export as WAV / PCM 16-bit
5) Upload the file in 3CX settings

04 · Who it’s for

Who needs this?

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3CX administrators
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Anyone setting up IVR prompts
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Anyone adding on-hold music
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Anyone recording greetings or voicemail
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Companies wanting professional voice prompts

05 · Why ECOLOR

Let ECOLOR set up your voice prompts

If you’d rather not convert manually, ECOLOR’s team — a 3CX Solution Provider — sets up your IVR prompts and on-hold music in the correct format and professional quality as part of your call-center setup.

Full IVR setupWe design the IVR tree and prepare voice prompts in the compatible format.
Professional conversionWe convert your files to the correct 3CX spec with no technical hassle for you.
Arabic & English supportA team close to you to help with setup and operation.
Guaranteed qualityClear, compatible prompts that work on 3CX the first time.

06 · FAQ

Frequently asked questions about 3CX audio format

What audio format does 3CX accept?

A WAV file with PCM encoding, an 8000 Hz sample rate, 16-bit depth, and a single Mono channel. This is the standard format for IVR prompts and on-hold music.

Does 3CX accept MP3 files?

It’s best to convert MP3 to WAV in the 3CX spec (PCM, 8000 Hz, 16-bit, Mono) to ensure acceptance and correct playback quality.

How do I convert a file to 3CX format?

Open the file in an audio editor such as Audacity, set the channel to Mono and the rate to 8000 Hz, then export as WAV with PCM 16-bit and upload it in 3CX.

Why does my audio play too fast or at the wrong pitch?

Usually because the file’s rate is different (e.g. 44100 Hz) instead of 8000 Hz. Re-export at 8000 Hz to fix it.

Can ECOLOR set up the voice prompts for me?

Yes, ECOLOR’s team prepares IVR prompts and on-hold music in the correct format and professional quality as part of your call-center setup.

We set up professional 3CX voice prompts for you

Whether you want to convert your files yourself or leave it to us, ECOLOR’s team in Saudi Arabia and the region is ready to set up your IVR prompts and on-hold music in the 3CX-compatible format at professional quality.