Music edits

You can adapt audio to your video in certain limits as laid out in the licensing terms. So, based on your description, I would think that your use is in line with the licensing terms.

Look here for more information on licensing: https://community.adobe.com/t5/stock/links-for-licensing-terms/td-p/11366788
(Disclaimer: As always with licensing, this is my interpretation of the rules. I think they are correct and advice is based on reading and interpreting the licence terms and on fair use for both the buyer and the artist/stock company, but I cannot rule out that my interpretation is wrong. I'm not an Adobe employee).

Have you read the Adobe Stock License Terms?
https://stock.adobe.com/license-terms

Restrictions for both Audio licenses:

• Audio files must be synchronized with picture, narration, etc. No stand-alone distribution. The audio file must not comprise the primary value of the end product.
• No remixing, mashups or other alterations for the purpose of creating a new music track. Only minimal modifications are allowed.
• Audio files cannot be incorporated into templates, logos, or other corporate branding.