Project to research, find and create a hackable platform for smart audio connectivity and seamless transmission between receiving and transmitting devices on same channel

Idea

Keypoints: looked at what my ble trans/receiver I had in its guts in, images here. The main chips I see are:

csr8670 - Bluetooth Audio SoC more info
sgm3717 - 4Ω, 400MHz Bandwidth, Dual, SPDT Negative Signal Handling Analog Switch more info
p8908 - 25mW TRUE CAP FREE STEREO HEADPHONE AMPLIFIER more info

csr8670

The csr8670 is a SoC with BLE, embedded flash for receiving and outputing audio signals.

Important note is that the csr8670 in my device has a newer version, the 8675.
In a product newsletter from Shenzhen Feasycom has a overviewed comparison between the old and new models [0].

csr8670	csr8675	notes
BT4.0	BT4.1	OS upgrade to BT 5.0
80 Mhz RISC MCU and 80 MIPS Kalimba DSP
16-bit audio	24-bit audio
8-96kHz	8-192kHz	Supported sample rates
16Mb Flash	16Mb Flash	External 64Mb SPI Flash
Stereo codec and 2 path MIC	Stereo codec and 2 path MIC
1 x I²S/PCM	2 x I²S/PCM	Meet the needs of multiple digital audio interfaces
SPDIF (blocks I²S/PCM's)	SPDIF (non-blocking I²S/PCM)
UART, USB2.0 full-speed, I²C	UART, USB2.0 full-speed, I²C & SPI	Serial interfaces
Master and slave bit-serialiser (I²C and SPI)
6 capacitive touch sensor inputs
Battery charger
3 LED and LCD segment driver
29 PIO ports	32 PIO ports	Up to w/ BGA package

Documetation & references

Product Page qualcomm.com pdf
Product Brief qualcomm.com pdf
Digikey product page digikey pdf
[0] CSR8670 vs CSR8675 feasy.com pdf

Sources

TODO: Chip maker, info and important takeaways.
Pros and cons.