Installed Universal Parameter Manager.

CSR8600 Release, v 2.3.137, Dec 11 2012 13:37:59

People say it only connects when running on windows 7 32-bits. It runs fine on Win10, but for me it doesn't connect to the speaker. 

"The transport remote cannot be opened.

Ensure that the device is connected and enabled."

It has a feature to load up a .csr file. I tried it, but the program crashes.

I tried generating .csr files with this tool. It creates files with data like this:

// PSKEY_DSP30 = CVC Configuration
&2276 = 2276 0000 0001 0000

 And if I try to dump this binary data into PSKEY_DSP30 field in PSTool, the tool warns me that the data length is unexpected, and offers to write it anyway. I didn't try forcing it, I feel like there is serious chance to brick the chip. I'm afraid that dsp will crash, and I won't be able to enable DFU mode on the speaker with button combination.

It just seems that the manager and the chip speak different languages. And it's unsurprising, since the manager is soooo ancient. So far, I had no luck getting something more recent.