Implementing a USB sound card using the bitsy FPGA board. This part covers the firmware side, implementing control requests for the USB audio class and the data flow from the end point to the audio core. Twitch: [https://twitch.tv/smunaut](https://twitch.tv/smunaut) Twitter: [https://twitter.com/tnt](https://twitter.com/tnt) Youtube: [http://www.youtube.com/c/SylvainMunaut](http://www.youtube.com/c/SylvainMunaut) 1bitsquared discord: [https://1bitsquared.com/pages/chat](https://1bitsquared.com/pages/chat)