When searching for synonyms for the term "audio partner," several options come to mind. One might consider the term "audio collaborator," which suggests a working relationship between two or more parties to create sound content. Another option is "audio co-conspirator," implying a partnership in developing subversive or original sounds. Alternatively, one could use the term "audio ally," which highlights a supportive and helpful collaboration. Finally, the term "audio confidant" suggests trust and confidentiality in a relationship between sound experts. Ultimately, the choice of synonym depends on the tone and context of the usage.