Raspberry Pi - 播放MP3音效檔

1. 在Raspberry Pi播放MP3音效檔並不難，內建就有一個音效播放程式omxplayer，首先，先取得一個mp3音效檔

$ wget https://goo.gl/XJuOUW -O example.mp3 --no-check-certificate

2. 透過headphone jack介面播放測試音效

$ omxplayer -o local example.mp3
Audio codec mp3 channels 1 samplerate 11025 bitspersample 16
Subtitle count: 0, state: off, index: 1, delay: 0

如果想要透過HDMI介面播放測試音效，可以藉由參數來設定

$ omxplayer -o hdmi example.mp3
Audio codec mp3 channels 1 samplerate 11025 bitspersample 16
Subtitle count: 0, state: off, index: 1, delay: 0

3. 參考來源
https://www.raspberrypi.org/documentation/usage/audio/