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Bluetooth module sound quality.

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Young Croc
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    Posted: 29 August 2015 at 1:34pm
I've a Sure 4.0 Bluetooth module in the control box on my Boombike.
I never use it as the sound quality is so bad compared to hard wiring.
Is this normal??
Or is there a way of improving things?
My Tinnitus is coming along nicely!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Swedgin Quote  Post ReplyReply Direct Link To This Post Posted: 29 August 2015 at 2:37pm

Do you have a good DAC between the bluetooth module and the amp? Audio that's transmitted via bluetooth is lossy (so a bit loss here) and digital. If you don't have a decent DAC it could be you lose a lot of detail in sound quality.

EDIT: your module has a sample rate of 94kHz, this should be enough (cd has 44,1kHz) but I don't see the resolution. Best is one of 16bit (or 24bit if you want to go high-end) so you don't lose much information.



Edited by Swedgin - 29 August 2015 at 2:49pm
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Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shortrope Quote  Post ReplyReply Direct Link To This Post Posted: 29 August 2015 at 2:56pm
I'm just taking an audio signal off the BT modules own RCA outlet into the Amplfier.
My Tinnitus is coming along nicely!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Swedgin Quote  Post ReplyReply Direct Link To This Post Posted: 01 September 2015 at 3:49pm
I did a quick research on bluetooth audio and came to conclusion that your module should have bluetooth 4.0 and aptx codec support for the best result, and it does.

I'm sorry but I can't help you further due to lack in knowledge. My guess is a poor resolution but I don't find the resolution of the module.


Edited by Swedgin - 01 September 2015 at 3:50pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gustavoppires Quote  Post ReplyReply Direct Link To This Post Posted: 10 January 2017 at 6:22pm
Hi.

I have the same module and did some blind A-B'ing with a high quality dac and could not spot any loss of quality. There's a catch though: The module's output clips at the highest BT volume settings (playing from my Samsung Galaxy S5, it clips in the top 70%+ volume settings).

Did you try lowering it?

Cheers!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 16 January 2017 at 12:41pm
Yea the module clips easily. As long as you are not overdriving it, you should get really good sound quality. We've used them and they're fine. 
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