Audio calibration database acdb is a static database on the apps processor. It has all tuning/calibration parameters for the LPAI. Qualcomm Audio overview - Qualcomm Linux Audio Guide
: Engineers can create, modify, and calibrate end-to-end use cases, including speaker EQ profiles and Echo Cancellation Noise Suppression (ECNS). qualcomm audio calibration tool
Can I use it without a Qualcomm license? A: The base tool is available to registered OEMs/ODMs. Non-commercial use requires a Snapdragon Audio SDK license. Audio calibration database acdb is a static database
: Proper Qualcomm HS-USB Diagnostic drivers are necessary for the PC to recognize the device's COM port. Can I use it without a Qualcomm license
After tuning is complete in QACT, the resulting .acdb file is placed in the device's file system (e.g., /etc/acdbdata/ ) to be used during operation. Usage Contexts Qualcomm® Audio Calibration Tool | Qualcomm Developer
Whether you are a design engineer preparing for mass production or an audiophile hacker tweaking your rooted phone’s audio libraries, the Qualcomm Audio Calibration Tool remains the most powerful instrument in the digital audio chain.