🎧 Streaming Audio Requirements
See below for the accepted Streaming Audio specifications.
Streaming Audio is avalible in the US, CA & UK
Accepted File Formats:
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.MP3, .M4A, .WAV
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Minimum bitrate: 192 kbps
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Max file size: 500MB
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For third-party creatives, we can’t reduce bitrate below the original encoding.
Preferred Tag Type:
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VAST 2.0
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Include both .MP3 and .OGG in the tag
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.OGG is only for third-party use (not for first-party hosting)
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Ad Lengths Accepted:
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15 or 30 seconds (60 sec allowed but not recommended)
Companion Banners (optional):
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File types: .JPEG or .PNG
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Size: 300x250
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Max file size: 150KB
🚫 Prohibited Content in Audio Ads
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Online gambling promotions (except brick-and-mortar)
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Violence, hate speech, adult/pornographic themes
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Pops, simulated clicks, malware, or code execution
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Explicit language or simulated cursing (e.g., #$%!)
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Spelling errors
📡 Third-Party Tag Specs
a2x by Triton Digital
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Suggested bitrate: 128 kbps
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File types: .MP3, .WAV, .WMA, .OGG
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Ad lengths: 15, 30, or 60 seconds
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Banner: .JPEG, .PNG, .GIF
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Banner tracking: 1x1 pixel (audio), pixel or JS tag (banner)
Adswizz (AudioMax)
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Does not apply to Pandora inventory
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Suggested bitrate: 196 kbps
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File types: .MP3, .WAV, .OGG, .ACC
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Ad lengths: 15, 30, or 60 seconds
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Banner: .JPEG, .GIF, .HTML
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Banner must be hosted on The Trade Desk (TTD)
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Max file size: 2MB
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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
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Most publishers accept 128–196 kbps
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For maximum reach, use 160 kbps or higher
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TTD-hosted creatives: DSP can adjust bitrate as needed
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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.