Any updates on your test? What BT stack are you using? Is the phone audi quality any better than the BS stack?
Good. will be waiting for your search results then
Anyway an update, I managed to get the license key for the iwrap5. According to the tech support I will also need the licence to use the CVC (the echo/noise cancel) Not sure how much that would cost, it seems that most of these module doesnt come with echo/noise cancel. Im gettting the impression that the BT handsfree project in the russian forum doesnt include the noise/echo cancel either.
Since Im using a PIC32 MCU to do the USB audio, Ill probably switch to DsPIC and use it for echo/noise.
The echo/noise cancel is the most importane bit unless these module can work fine even without it. There are some SW solution like the BS but if that can work as good I see no reason to make a HW version really.
Is BS really that bad? echo/noise/quality and reliability?
I've got pretty bad echo in my car. I hear everything fine, but whoever I am talking to hears themselves echoing back. Just looking through my Mic settings in Windows, I see Noise Suppression not turned on, and Acoustic Echo Cancellation also not turned on. Since windows knows what's going out and what's going in, I think these might be worth playing with. I think that a high-end directional microphone would help a lot too.
I'm almost even tempted to suggestion a "Push-To-Talk" button to toggle the microphone (seems unsafe while driving though). In a perfect world, DriveLine might even monitor the line levels of the mic and speakers, and adjust the two so when one goes up the other goes down. Ideas, ideas.
Even with my highend DA-350 and SOHO Pci card the audio quality is not good enough with BS. I don't have echo, I don't have noise but I have bad quality audio.
I do hear everything pretty clearly but the people I call say they don't hear me very well !!!! so it's the outgoing audio which is bad !
Might be my wiring. I'm going to check that this weekend.
Last edited by hadaak; 11-14-2012 at 06:10 AM.
I just asked the guy to sell me one unit to test.
If you gonna get a BT module, do ask the supplier if it does have the echo and noise cancel built it. Most of them either dont have it or claim to support but it doesnt mean you will get it on the module you buy. $95 for the WT32 from farnell and it still doesnt have the echo and noise cancel built in
guy confirmed echo and noise cancel and all this for 75$ + shipping !!!
But the module is out of stock now. I'm waiting for his notification when he makes other units.
Are you guys interested? It can probably speed things if he knows there are 3 modues to make :-)