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Linkable bluetooth module?

Anybody know if this is accessible to the average consumer?  I've had a couple people ask me if I can make linkable bluetooth speakers and I haven't seen or can recollect that this is out there to the public.  Also, I'm not 100% sure what the name would be to search other than linkable bluetooth module or chip.  



  • Multi-room audio systems such as sonos or bluesound use proprietary wi-fi mesh network. Similar concept exists for bluetooth mesh systems, but typically used in IOT applications. Bluetooth 5 supposedly have enough bandwidth for audio HD audio streaming, but haven't seen any mainstream practical applications. Some cars / phones ahve started to support multiple sources (where you can connect multiple phones simultaneously meaning only 2 for now) but will get more popular.
  • If anybody knows of any easy to use Wi-fi mesh or bluetooth mesh system for synchronous audio, i would be interested to know too. (DIY or open source preferred of course!)
  • If the sole purpose is to have a party mode, LMS can play the same audio to all clients. 
  • Sorry, whats lms?
  • Squeezebox or Logitech media server. Forgot about this, but it is a WiFi mesh similar to Sonos, but with more capabilities and crappy UI and lots of hair pulling.
  • Logitech Media Server, can be hosted in pretty much anything. A raspberry 3 can be server and client with turnkey distros.
    As for the UI, Orange Squeeze works quite well an there some free apps for android that work well.
  • Logitech Media Server, can be hosted in pretty much anything. A raspberry 3 can be server and client with turnkey distros.
    As for the UI, Orange Squeeze works quite well an there some free apps for android that work well.
    Do you have it up and running? This is on my long list for trying, but never got around to it. hat is your setup and how are you using it?
  • Had it before moving. Plan to re do it once I get back. 
    For the server side I have been using vortexbox. It is a fedora distro with LMS. 
    On the client I use picore player. For a while I used a raspberry 3 as server and client. 
  • Vortexbox:


    Both my RPI have DACs from hifiberry:

    There are other brands of DAC that get better reviews, I went with hifiberry due to shipping to Mexico.

    On my old RPI (Original model B) I was unable to make wireless work stable enough for FLAC. So it remained wired.
    On the RPI 3 the onboard wireless works like a charm. 

    My current plan once I get back to TX is to use the RPI 3 with updated picoreplayer as standalone player (server and client) with a 250GB SSD (USB to SATA cable) for storage. And connect it to a HiFly amp.

    Not the best amp, but it is what I have ATM.
  • Have you tried the hifiBerryOS? It seems to have LMS on it. 
  • My old LMS server is still in storage in Mexico, uses old parts (except HDD that was updated recently):

    1 GB DDR3 RAM, some POS cheap case, picoPSU (do not remember if 150 or 160 Watts and the most expensive part, the HDD HGST DeskStar 4TB.

    So for the server if you have a RPI 3 or newer and an external HDD you can give it a try with picoreplayer.
    If you have an old laptop no longer in use, you can try vortexbox.
    For client the easiest I have used is picoreplayer.

    Sorry for the hijack.

  • I have a couple of Pi's lying around and the hifiberry Beocreate which is a 4channel DSP/DAC/Amp and an unfinished Speaker which is still crossoverless, so i can play with it being active - hopefully in the next few weeks.
  • Back to the original question, soundcore/anker uses "partycast" to sync 100+ speakers:

    Does seem to use BT:

    So it is doable, how accessible to the average Joe? No idea... 
  • From a Qualcomm news blurb, note the "Near perfect synchronization"

    Now Available on the Qualcomm® Snapdragon™ 845 Mobile Platform, this Technology Helps Consumers to Wirelessly Stream Music from a Single Device to Numerous Headsets or Speakers with Near Perfect Synchronization 

    Qualcomm Technologies International, Ltd., a subsidiary of Qualcomm Incorporated (NASDAQ: QCOM) announced today that its Broadcast Audio technology is now available on the Qualcomm® Snapdragon™ 845 Mobile Platform. Qualcomm® Broadcast Audio is designed to allow one Bluetooth source to stream audio to numerous headsets or speakers with near perfect synchronization. The technology is designed to support Bluetooth to be used for one-to-many sound broadcasting – helping to extend the capabilities of traditional Bluetooth. Qualcomm Broadcast Audio supports ad-hoc multi-speaker parties, sharing headphones and listening to the same music from a single smartphone, or for group audio tours.

  • Looks like an universal solution is on the way, as per the release for Bluetooth LE standard.

    Timeline was supposed to be H1 2020 for the release of specifications.

    Multi-Stream Audio will enable the transmission of multiple, independent, synchronized audio streams between an audio source device, such as a smartphone, and one or more audio sink devices.
    Extensive listening tests have shown that LC3 will provide improvements in audio quality over the SBC codec included with Classic Audio, even at a 50% lower bit rate.

  • The couple I have seen can use a wired source and tx to 2 players. 
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