OT82111_VC1 Firmware Test Guide¶

1. Block Diagram Introduction¶

2. A316-LS-MIC-V2 Default Input and A316 Output¶

• A316-LS-MIC-V2 default input to A316 is fixed at 24-bit 48KHz
• Regardless of the sampling rate selected during recording, when the USB device outputs to the 3.5mm audio interface (headphone test), the audio will be converted to 24-bit 48KHz for playback
• USB device output to playback device audio format is 24-bit 48KHz and cannot be changed

3. I2S Output Sampling Rate Acquisition and Switching¶

The A316-LS-MIC-V2 evaluation board supports switching between different input sampling rates via button, and audio will be output normally through the 3.5mm interface (headphone test). Switchable sampling rates include: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz. For precise sampling rate measurement, a logic analyzer can be used to capture waveforms (actual measurement may have some error).

1. Button Location for Switching Sampling Rates¶

2. A316-LS-MIC-V2 Waveform Capture Connection Method¶

3. Recording and Waveforms at Different Sampling Rates (All 24-bit)¶

• 44.1KHz:

• 48KHz:

• 88.2KHz:

• 96KHz:

• 176.4KHz:

• 192KHz:

Inquiries and Feedback¶