Voice & Audio for Listening Sections of Textbook

Require voice and introductory background audio (e.g. train sound, telephone ring, waves noise etc.) for two person conversations for the listening sections of a textbook. Require a variety of voices, male and female, General American and British English (BBC/RP). Canadian and Australian accents are also acceptable. Voices must all be native speakers. The scripts are ready to go. There are 15 short sections of 2000 words in total. 10 distinct voices required for pair conversations (5) and two (one man and one woman) required for the remaining 10 which is an interview exchange. Must be willing to assign all IP rights upon completion via contract.