The Qualcomm Audio Calibration Tool (QACT) is an advanced software suite designed for developers and engineers to tune, calibrate, and debug audio processing modules on Qualcomm-based platforms. It serves as a real-time interface between a PC and the Digital Signal Processor (DSP) on a target device, such as a smartphone or Bluetooth speaker. Core Functionality

Calibrating a device often follows a structured path to ensure optimal sound quality:

Typical workflow

1. Measure: capture speaker and microphone frequency responses in a controlled environment.
2. Analyze: derive target curves and identify resonances or nulls.
3. Configure: edit DSP filters, EQ, and mic-array parameters in the calibration UI or config files.
4. Validate: run objective tests (THD, SNR, frequency response) and subjective listening checks.
5. Deploy: generate calibration blobs and flash to device firmware or include in production images.

ACT is the interface that "teaches" the DSP about the hardware. It allows engineers to tune the signal path so that the DSP compensates for hardware limitations and acoustic anomalies.