Tag Archives: audio

LEGO Mindstorms EV3 Audio Streamed via Bluetooth Audio

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Whilst displaying my Robots at a major Exhibition, I got to thinking that it would be great to pipe the EV3’s Audio to a Bluetooth Speaker, so my robot can be heard among the noise of a crowd.
Here are my notes so far on getting started with Connecting a LEGO Mindstorms EV3 Brick to a Bluetooth Audio Speaker:

  • Debian jessie is using BlueZ 5 and PluseAudio 5, which are fairly new. There were major breaking changes in these versions, so most stuff you find on the Internet will be for BlueZ 4/PulseAudio 4, so it does not work at all, so watch out.
  • BlueZ 5 dropped support for alsa [1], so the solution for now (until someone updates some bluez-alsa project for BlueZ 5) is to use PulseAudio.
  • PulseAudio 5 only supports the A2DP profile and not HSP/HFP [2] (although it his under development [3]).

Lets Start:

Streaming FLAC Audio to MP3 Enabled Devices

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I purchased myself a Sony CMT-MX750Ni Mini Hi-Fi System. It is a fantastic home audio device that plays from the following media: CD, USB, Audio In, iPod/iPhone, FM Tuner, DAB Tuner, Home Network (Windows Media Streaming), Internet Music Services via wireless and wired connection. The Sony CMT-MX750Ni is easy to use and allows access to all of your audio content, wherever it is located (with the exception of vinyl and tape). It is easy to set up and produces very good quality sound.



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