![]() In today’s tutorial I’ll show you how to generate high quality audio using the I2S bus. This solution has the advantage of being very cheap and easy to make by contrast the sound quality is not very high. Even if you can find on the market some devices that extract audio flows from the HDMI stream, those devices are often expansive and bigger than the Raspberry Pi Zero itself!Ī very simple solution, well explained in a tutorial by Adafruit, is to generate the audio signal using two PWM ( Pulse Width Modulation) pins and a low-pass filter made with some passive components. ![]() ![]() Raspberry Pi Zero unfortunately doesn’t offer a dedicated audio connector: audio output is indeed normally performed via HDMI:Īlthough this is perfect for applications like media centers (where audio and video are reproduced by the monitor/television connected via HDMI), it’s not handy in embedded applications where you only need to play some audio files (for example to add audio warnings). A help may come from the ThePiLocator website, which displays in realtime the availability of the different Pi Zero boards on the official stores. It may be sometimes difficult to buy a Raspberry Pi Zero… it’s indeed often out of stock on the different webstores.
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