🐞 AAC-based HLS transcodings not available 🫨

[superturboryan]

Summary

Deprecation notice #441 mentions that we should now see properties for hls_aac... in the response for /tracks/{track_urn}/streams, with MP3/Opus scheduled for removal on 15 November 2025.

However this API still returns the old response format containing only:

http_mp3_128_url, 
hls_mp3_128_url, 
hls_opus_64_url, 
preview_mp3_128_url

for all tracks I've tested, including one posted in the last 24 hours (URN: soundcloud:tracks:2198164539).

See comment: #441 (comment)

When should we expect to see the responses for this API to include the new transcodings?

Will all tracks on SoundCloud have an HLS AAC transcoding available before the expected deprecation date of 15 November 2025?

Thanks SoundCloud team 🧡

Expected

{
  "http_mp3_128_url": "https://cf-media.sndcdn.com/trackid.128.mp3?...",
  "hls_mp3_128_url": "https://cf-hls-media.sndcdn.com/playlist/trackid.128.mp3/playlist.m3u8?...",
  "hls_aac_160_url": "https://playback.media-streaming.soundcloud.cloud/trackid/aac_160k/uuid/playlist.m3u8?...",
  "hls_opus_64_url": "https://cf-hls-opus-media.sndcdn.com/playlist/uuid.64.opus/playlist.m3u8?...",
  "preview_mp3_128_url": "https://cf-preview-media.sndcdn.com/preview/0/30/trackid.128.mp3?..."
}

Actual

{
  "http_mp3_128_url": "...",
  "hls_mp3_128_url": "...",
  "hls_opus_64_url": "...",
  "preview_mp3_128_url": "..."
}

References

• Deprecation Notice: MP3 & Opus Transcodings → Move to AAC HLS by Dec 31, 2025 #441
• SoundCloud developer blog post

[dpreussler]

As of the issues: we're extending the deadline till end of the year! 🙏

[dpreussler]

You should see the new transcodings now. Still not on all tracks yet as its an ongoign process but for sure can test with recent tracks