OT82111_VC1 Firmware Test Guide¶

I. Block Diagram Overview¶

II. 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 sample 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.
• The audio format output from the USB device to the playback device is 24-bit 48KHz and cannot be changed.

III. I2S Output Sample Rate Acquisition and Switching¶

The A316-LS-MIC-V2 evaluation board supports switching between different input sample rates via buttons, with audio output normally through the 3.5mm interface (headphone test). Switchable sample rates include: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz. For precise sample rate measurement, use a logic analyzer to capture waveforms (actual measurements may have some margin of error).

1. Sample Rate Switching Button Location¶

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

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

• 44.1KHz:

• 48KHz:

• 88.2KHz:

• 96KHz:

• 176.4KHz:

• 192KHz:

Inquiries and Feedback¶