I don't know if this is the correct forum so apologies if not. I found one historical thread where this question was asked before but no answer found but it may be technology has moved on.
I want to convert two passive speakers to stereo battery powered wireless. No cables at all.
So the source needs a stereo transmitter of some sort and each speaker needs a receiver that can be set to receive either left or right channel. Building a battery powered amp into the speaker is the trivial bit but I can't find a technology for the wireless (e.g. bluetooth) that doesn't require a single receiver that then needs a cable between the speakers.
There must be a way but I'm clearly googling the wrong thing. Distance requirement is 3m minimum 5m preferred
All ideas appreciated. Thanks
I want to convert two passive speakers to stereo battery powered wireless. No cables at all.
So the source needs a stereo transmitter of some sort and each speaker needs a receiver that can be set to receive either left or right channel. Building a battery powered amp into the speaker is the trivial bit but I can't find a technology for the wireless (e.g. bluetooth) that doesn't require a single receiver that then needs a cable between the speakers.
There must be a way but I'm clearly googling the wrong thing. Distance requirement is 3m minimum 5m preferred
All ideas appreciated. Thanks
Here is an example transmitter (no clue if it's any good but says it can stream to two devices simultaneously): Avantree Oasis Plus Certified aptX HD Bluetooth 5.0 Transmitter Receiver for TV, Low Latency Wireless Audio Adapter for Headphone, Long Range, Voice Guide, Touch Screen, Splitter for Wire & Wireless: Amazon.co.uk: Computers & Accessories then get two Bluetooth receivers and only pull the left or right channel wires.
How well they will synchronize is another question.
How well they will synchronize is another question.
Thanks for the reply. I've got a two channel bluetooth transmitter and I'm afraid the answer is that they don't synchronise. They are not far off but certainly not accurate enough to carry separate L/R channels
Did the Bluetooth transmitter and receivers you tried support apt-x low latency? If not then that could bring some improvement.
Otherwise, wifi is probably your best bet, maybe an RPI zero with this: synchonized streaming to multiple clients/loudspeakers
Otherwise, wifi is probably your best bet, maybe an RPI zero with this: synchonized streaming to multiple clients/loudspeakers
What you need is "True Wireless Stereo", or TWS. TWS is very common in wireless headphones--one side acts as the master, and re-transmits the signal to the other side, suing a low-latency protocol. The Qualcomm QCC300X series provides TWS, and the version you need for speakers is the QCC3008. There is another "standard" called TWS+ that directly sends synchronized left and right audio to the respective speakers (no master). However, the TWS+ protocol is still not supported in cell phone chipsets, so that standard isn't commonly used.
You can buy lots of Bluetooth boards that support TWS, and the QCC3008 is not the only SoC that supports TWS. But keep in mind that you will need to provide 3 pushbutton switches to put the device in TWS bonding mode and to get the two boards to act as a stereo pair. On the QCC3008, the switches you need also control Play, Vol+ and Vol-. It's going to be a lot easier if you find a board that already has the switches on it.
You can buy lots of Bluetooth boards that support TWS, and the QCC3008 is not the only SoC that supports TWS. But keep in mind that you will need to provide 3 pushbutton switches to put the device in TWS bonding mode and to get the two boards to act as a stereo pair. On the QCC3008, the switches you need also control Play, Vol+ and Vol-. It's going to be a lot easier if you find a board that already has the switches on it.
Neil
Thanks for the suggestion - that looks hopeful. I assume that a pair of these would be the starting point?
QCC3008 Bluetooth V5.0 Low Power Bluetooth Audio Module APTX LL Lossless Co F4Q1 194982116344 | eBay
Thanks for the suggestion - that looks hopeful. I assume that a pair of these would be the starting point?
QCC3008 Bluetooth V5.0 Low Power Bluetooth Audio Module APTX LL Lossless Co F4Q1 194982116344 | eBay
Yes, those boards will work fine. Once bonded to each other, they will show up as a single stereo device on your phone or other Bluetooth source.
However, they don't come "pre-bonded" the way headphones do. You will need to follow the instructions in the "Descriptions" section of the page you linked to force them into TWS mode. That will require 3 pushbutton switches, wired up as shown in the schematic. You will need the 3 switches for both boards.
Also, the analog output for these boards is differential--that might be an issue if your amp input is single-ended.
I'll post some instructions with pictures on the Audiodevelopers web site later on showing how to add an external antenna and other info.
However, they don't come "pre-bonded" the way headphones do. You will need to follow the instructions in the "Descriptions" section of the page you linked to force them into TWS mode. That will require 3 pushbutton switches, wired up as shown in the schematic. You will need the 3 switches for both boards.
Also, the analog output for these boards is differential--that might be an issue if your amp input is single-ended.
I'll post some instructions with pictures on the Audiodevelopers web site later on showing how to add an external antenna and other info.
I’ve wanted to know how to do this for ages! thank you so much 😀. I would be really appreciative of more info and pics also.
QCC3008 Bluetooth 5.0 Module Support APTX A2DP AVRCP HFP AAC I2S for Amplifier Audio|Operational Amplifier Chips| - AliExpress
not sutable. has orange relay for input switching between Bluetooth or analog input.
feedback from aliexpress about this board:
has play and vol+/- buttons.
wondering if this would work? for a finished product in a nice protective case:
Bluetooth 5.0 QCC3008 Aptx LL Low Latency Receiver Wireless Optical SPDIF Toslink Coaxial RCA Aux 3.5mm Home Audio Music Adapter|Wireless Adapter| - AliExpress
wondering if this would work? for a finished product in a nice protective case:
Bluetooth 5.0 QCC3008 Aptx LL Low Latency Receiver Wireless Optical SPDIF Toslink Coaxial RCA Aux 3.5mm Home Audio Music Adapter|Wireless Adapter| - AliExpress
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I’m thinking of getting this, its got isolated dc-dc converter option to prevent ground loops i think and tpa6132 pdf headphone amp. That also provides diff to single ended output conversion. With features like turn on pop suppression and S/N of 100dB
QCC3008 TWS Audio Car Bluetooth Receiver Board APTXLL Lossless Music Hifi Bluetooth 5.0 Receiver Board|Integrated Circuits| - AliExpress
QCC3008 APTXLL lossless music hifi Bluetooth 5.0 receiver board TWS audio car Bluetooth receiver board|Integrated Circuits| - AliExpress
QCC3008 TWS Audio Car Bluetooth Receiver Board APTXLL Lossless Music Hifi Bluetooth 5.0 Receiver Board|Integrated Circuits| - AliExpress
QCC3008 APTXLL lossless music hifi Bluetooth 5.0 receiver board TWS audio car Bluetooth receiver board|Integrated Circuits| - AliExpress
What audio compression format does TWS use? sbc or apt LL or apt hd 🙂?
I can’t find any tech info. As there datasheets are all secret 🙁. which is why i gave up in the past.
Really want a lossless L,R speaker system that uses a freq band that has good penetration like bluetooth has. unlike 5.8ghz
I can’t find any tech info. As there datasheets are all secret 🙁. which is why i gave up in the past.
Really want a lossless L,R speaker system that uses a freq band that has good penetration like bluetooth has. unlike 5.8ghz
I was the person who wrote that review for the QCC3008 board with the relay. I tried using that board for TWS and couldn't get it to work, due to the software on the SoC. It's a great solution if you can get by with one receiver, but you can't use the TWS capability of the QCC3008. The board you showed in the previous post is the best option for TWS for amps with single-ended input, which is most common. It's also got the DC-DC converter, which you will most likely need for single-ended audio connections. It doesn't have the pushbutton switches, but it's overall an easier board to use for active speakers with two receivers.
TWS is just the master-slave configuration, and it doesn't have anything to do with the CODEC's. According to the data sheet, the compression formats are aptX, aptX Low Latency, SBC, and AAC, so it should work well for Android or IOS.
You can't get truly lossless using Bluetooth, at least not now. Lossless requires higher bandwidth, more power and large buffers (and delays) to ensure reliable delivery. The only "standard" way to achieve that today is WiFi or the more expensive WiSA.
Adding the external antenna is very easy--just cut the antenna trace near to where it comes out of the chip and connect the coax of an SMA pigtail, with the shield connected to ground. It will give you a lot more range, which is important if you are using TWS mode with the speakers spaced widely apart.
TWS is just the master-slave configuration, and it doesn't have anything to do with the CODEC's. According to the data sheet, the compression formats are aptX, aptX Low Latency, SBC, and AAC, so it should work well for Android or IOS.
You can't get truly lossless using Bluetooth, at least not now. Lossless requires higher bandwidth, more power and large buffers (and delays) to ensure reliable delivery. The only "standard" way to achieve that today is WiFi or the more expensive WiSA.
Adding the external antenna is very easy--just cut the antenna trace near to where it comes out of the chip and connect the coax of an SMA pigtail, with the shield connected to ground. It will give you a lot more range, which is important if you are using TWS mode with the speakers spaced widely apart.
thanks muchly for posting that review!.
Yea i can solder wires for panel mounted switches on to pcb np.
What datasheet? Can it be uploaded somewhere?
how do i get it to do tws with aptx?
Sony had a alt codec i think to aptx HD. I think it was better or the same, i forget already. They where not charging fees for some uses. i forget and keywords to search... hmm
I’ve been experimenting with fpv 5.8ghz tx/rx gear and sending spdif over the video channel. Works well but needs line of sight and to be high up to prevent interference from human body's. its lossless pcm and seams to be low latency 🙂.. Using fpv gear makes for great range outdoors in open space thanks to 600mw tx and more fancy anteriors .
Other wise its expensive pro audio RF wireless audio gear but it seams to get good low distortion, full freq range say 20-20KHz, low noise floor gear its a more than £1000 for 4x speakers or maybe just under or around £1000 for 1tx 2rx.
Yea i can solder wires for panel mounted switches on to pcb np.
What datasheet? Can it be uploaded somewhere?
how do i get it to do tws with aptx?
Sony had a alt codec i think to aptx HD. I think it was better or the same, i forget already. They where not charging fees for some uses. i forget and keywords to search... hmm
I’ve been experimenting with fpv 5.8ghz tx/rx gear and sending spdif over the video channel. Works well but needs line of sight and to be high up to prevent interference from human body's. its lossless pcm and seams to be low latency 🙂.. Using fpv gear makes for great range outdoors in open space thanks to 600mw tx and more fancy anteriors .
Other wise its expensive pro audio RF wireless audio gear but it seams to get good low distortion, full freq range say 20-20KHz, low noise floor gear its a more than £1000 for 4x speakers or maybe just under or around £1000 for 1tx 2rx.
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Does TWS depend on what codec the audio source connects to the system with? can i input analog into one board connected to a speaker and have the same qcc3008 board do ADC and transmit to the other speaker?
oh thanks for confirming its is ok to add external ant to the board. had been wondering if a hack like that is ok/works.
Avantree Oasis Plus Certified aptX HD Bluetooth 5.0 Transmitter Receiver for TV, Low Latency Wireless Audio Adapter for Headphone, Long Range, Voice Guide, Touch Screen, Splitter for Wire & Wireless: Amazon.co.uk: Computers & Accessories
I assume this cant be used to do tws links between amps/speakers?
or If using as tx from audio source. Can it’s extra long range be used with QCC3008? so i can walk far away 20m+ with the avantree oasis plus as a tx, connected to my music player and with qcc3008 as rx and tws. It will work still despite qcc3008 not being from the same long range bluetooth class?
I assume this cant be used to do tws links between amps/speakers?
or If using as tx from audio source. Can it’s extra long range be used with QCC3008? so i can walk far away 20m+ with the avantree oasis plus as a tx, connected to my music player and with qcc3008 as rx and tws. It will work still despite qcc3008 not being from the same long range bluetooth class?
How cheap does it have to be ?
ALTO Professional Bluetooth Total - Professional: Amazon.co.uk: Electronics
ALTO Professional Bluetooth Total - Professional: Amazon.co.uk: Electronics