This chapter details the production and analysis of the spoken language data collected during the Manchester Voices project. Using self-recorded speech samples submitted through an online platform, as well as recordings from the Accent Van, the research focuses on how people across Greater Manchester pronounce certain key vowels. The chapter outlines the methodology used for auditory and acoustic analysis, including how vowel qualities were measured, compared, and interpreted. It presents findings on regional variation across the ten boroughs, suggesting there is a natural split between north, central, and south Greater Manchester. The chapter also discusses the social and linguistic significance of these findings, especially in relation to enregisterment, perceived prestige, and shifting urban identities. By comparing these production data with the perception data from Chapter 2, the chapter begins to build a fuller picture of how language is both used and understood in contemporary Greater Manchester.