🎧 Streaming Audio Requirements

Accepted File Formats:

• .MP3, .M4A, .WAV

• Minimum bitrate: 192 kbps

• Max file size: 500MB

• For third-party creatives, we can’t reduce bitrate below the original encoding.

Preferred Tag Type:

• VAST 2.0

• Include both .MP3 and .OGG in the tag

  • .OGG is only for third-party use (not for first-party hosting)

Ad Lengths Accepted:

• 15 or 30 seconds (60 sec allowed but not recommended)

Companion Banners (optional):

• File types: .JPEG or .PNG

• Size: 300x250

• Max file size: 150KB

🚫 Prohibited Content in Audio Ads

• Online gambling promotions (except brick-and-mortar)

• Violence, hate speech, adult/pornographic themes

• Pops, simulated clicks, malware, or code execution

• Explicit language or simulated cursing (e.g., #$%!)

• Spelling errors

📡 Third-Party Tag Specs

a2x by Triton Digital

• Suggested bitrate: 128 kbps

• File types: .MP3, .WAV, .WMA, .OGG

• Ad lengths: 15, 30, or 60 seconds

• Banner: .JPEG, .PNG, .GIF

• Banner tracking: 1x1 pixel (audio), pixel or JS tag (banner)

Adswizz (AudioMax)

• Does not apply to Pandora inventory

• Suggested bitrate: 196 kbps

• File types: .MP3, .WAV, .OGG, .ACC

• Ad lengths: 15, 30, or 60 seconds

• Banner: .JPEG, .GIF, .HTML

• Banner must be hosted on The Trade Desk (TTD)

• Max file size: 2MB

• Tracking: supports JavaScript, HTML, or rich media

📐 Companion Banner Sizes

For Spotify and Pandora, use a third-party VAST tag with supported companion banner sizes. Delivery isn’t guaranteed but will be attempted.

🔧 Bitrate Guidance

• Most publishers accept 128–196 kbps

• For maximum reach, use 160 kbps or higher

• TTD-hosted creatives: DSP can adjust bitrate as needed

• Third-party hosted creatives: DSP cannot adjust bitrate

If running across multiple publishers (e.g., Spotify + iHeart), you can upload a 320 kbps hosted creative—TTD will adjust it for each publisher as needed.