Over the past two decades, Plan 9 has seen many improvements and contributions and been made accessible on modern hardware by projects such as 9front. While appealing for certain tasks, audio processing has not been in the spotlight much. Despite the many ports and tools now available, information about them is splintered across many websites and code repositories and it can be difficult to piece together the overall picture. In particular, Plan 9 typically isn't known for music production, yet while it cannot approach the feature set of modern digital audio workstations (DAWs) on other systems, it is quite capable. This talk will explore the topic of audio processing on Plan 9 from a musician's perspective, show what can be done currently, and discuss its limitations and needs. Basic knowledge of Plan 9 is assumed. Topics covered: driver support, decoding/encoding, audio players, recording and editing, visualization, MIDI tools, trackers, synthesis, production.