Setup Jobs

Send Voice (WAV File Broadcast)

Send Voice lets you broadcast a pre-recorded WAV audio file to recipients’ phone numbers. Use this when you have a professionally recorded message or need a specific voice that TTS cannot reproduce.

TTS vs Send Voice If you don’t have a pre-recorded file, use Send TTS instead — it converts typed text to speech and offers more options (voice selection, merge fields, header message). Send Voice is for when you already have a WAV file ready to go.

Sending a Voice Broadcast

  1. Open the wizard
    From the left-hand menu select Send Message › Send Voice.
  2. Select your recipient list(s)
    Tick one or more lists. The same tools available on the other wizards apply here:
    • Manage My Lists — opens My Lists › Manage My Lists if you need to upload or edit a list first.
    • Filter / Sort — filter by last-updated date and sort by Date or Name.
    • Remove Duplicate Destinations (Dedupe) — sends only one call to each unique phone number across all selected lists.
  3. Confirm recipients & name your broadcast
    Check the recipient count at the top right, enter a Broadcast Name, then click Next.
  4. Upload your WAV file
    Click Upload WAV File and select your audio file. Only WAV format is accepted. See WAV File Tips below for guidance on preparing your file.
  5. Choose voice message type
    Select One-way or Two-way:
    • One-way — broadcasts your WAV file to all recipients simultaneously, no reply expected.
    • Two-way — recipients can press a key on their phone to trigger a response. See Two-Way Options below.
  6. Test & submit
    Testing is optional but highly recommended. Enter your landline and/or mobile number and click Next to hear your WAV file before it goes to your full list. Tick Skip Test Message to proceed directly to the scheduling screen, where you can schedule delivery or set up a distributed send.

Two-Way Voice Response Options

When two-way is selected, you can configure up to three keypress responses. For each key (1, 2, 3) you can optionally set:

  • A WAV file to play — uploaded separately for each keypress, played to the recipient when they press that key
  • A redirect phone number — transfers the live call to that number (include area code)

Both the WAV file and the redirect number are optional for each keypress — leave unused keypresses blank.

Live calls only Call transfers and keypress WAV files only work when the recipient is listening live. Always include a callback number spoken in your main WAV file for recipients who may be listening to a voicemail recording of it.

Advanced Options

Delivery Cutoff Time

Set a time of day after which no further calls will be made. Displayed in your account’s configured timezone. Useful for keeping calls within business hours.

Voicemail WAV File

Upload a separate WAV file to be played if a call goes to voicemail. This lets you leave a simpler, voicemail-appropriate message (e.g. a callback number only) rather than your full interactive recording. WAV format only.

WAV File Tips

WEL only accepts WAV format audio files. Before uploading:

  • Record at 8 kHz, 16-bit mono for best compatibility with telephone networks — higher sample rates are not beneficial for voice calls and increase file size
  • Keep the message concise — long silences or pauses at the start can cause the system to misdetect voicemail
  • Speak clearly and at a measured pace; phone audio is narrowband and less forgiving than music or broadcast audio
  • If using two-way keypresses, record your response WAV files in the same audio quality as the main file for a consistent listener experience
  • Test your file on a real phone before broadcasting to a large list