# BPI-R1 Audio Banana pi BPI-R1 support two audio device HDMI and headphone * How to choose HDMI or headphone for audio output ``` sudo nano /etc/asound.conf ``` ``` pcm.!default { type hw card 0 //If you want to set HDMI as output ,turn 0 to 1. device 0 } ctl.!default { type hw card 0 //If you want to set HDMI as output ,turn 0 to 1. } ``` * Plug in the headphone and type ``` speaker-test -twav -c2 ``` * The sound "sound left，sound right，sound left" will output from headphone. ``` sudo apt-get install espeak espeak "hello"　　 //say: hello espeak "hello_bananapi"　　 //say: hello banana pi ``` * Run the sound volume controler,you can see ``` sudo alsamixer ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://bananapi.gitbook.io/bpi-r1/zh/bpi-r1audio.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.