# transcoder AddOn license and technical question about transcoding **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [November 3, 2014, 4:50pm UTC](https://community.wowza.com/t/transcoder-addon-license-and-technical-question-about-transcoding/40400 "2014-11-03T16:50:11Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jorge\_jorge](https://avatars.discourse-cdn.com/v4/letter/j/8e7dd6/32.png) [@jorge\_jorge](https://community.wowza.com/u/jorge_jorge)\ **Post date:** [November 3, 2014, 4:50pm UTC](https://community.wowza.com/t/transcoder-addon-license-and-technical-question-about-transcoding/40400/1 "2014-11-03T16:50:11Z")
Hi all and apologies for the ambiguous topic. Basically we want to transcoding from AAC audio to mp3. I think this can be made with the AddOn trancode module, it’s right or i’m wrong? If it’s right, the second question is: it’s necesary another license (perpetual) to do this or, It’s possible with my current perpetual license (Wowza Streaming Engine 4 Perpetual Edition 4.1.0 build12602) Thanks a lot in advance ---
**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\ **Post date:** [November 3, 2014, 10:29am UTC](https://community.wowza.com/t/transcoder-addon-license-and-technical-question-about-transcoding/40400/2 "2014-11-03T10:29:46Z")
Hello there, the Wowza Transcoder can ingest MP3 audio and encode it to AAC audio, but not the other way around. And I am fairly certain you will need to purchase a separate perpetual Transcoder license. You can contact sales@wowza.com to find out more about this. Kind regards, Salvadore ---
**Author:** ![jorge\_jorge](https://avatars.discourse-cdn.com/v4/letter/j/8e7dd6/32.png) [@jorge\_jorge](https://community.wowza.com/u/jorge_jorge)\ **Post date:** [November 3, 2014, 7:01pm UTC](https://community.wowza.com/t/transcoder-addon-license-and-technical-question-about-transcoding/40400/3 "2014-11-03T19:01:29Z")
thanks a lot for you response