BLE Voice

  Introduction When developing Bluetooth speakers with Jieli’s audio SoCs, adding custom prompt tones often brings up a few common issues – popping noises during power on/off, unsupported audio formats, etc. This guide walks through these issues and their solutions using the Jieli AC696N development board. 1. Pop/click noise when playing prompt tones during power on or off First, listen to the original prompt tone file – is the noise already in the audio itself? On the development board, the SDK code already includes the following two lines to handle this (add them if missing): c // Power on: disable PA before ramping up // Power off: disable PA before shutdown Explanation: When the speaker is powered on or off, the amplifier (PA) and speaker can produce a pop/click sound – this is normal behavior. The solution is to disable the power amplifier before the power‑on sequence, and also disable it before shutting down. The SDK example has these lines written by default. During debug...

1. Introduction The JL AC696N development board comes with predefined prompt tones. Since developers often need to add their own tones, this guide uses the AC6966B chip as an example to explain how to add custom prompt tones step by step. 2. Detailed Instructions 2.1 Configuration Tool Custom prompt tones need to be added via the configuration tool. Typical path: ac696n_soundbox_sdk_v1.7.0_patch01_dev_board_v0.0.2\cpu\br25\tools\soundbox\standard media.licdn.com Open the configuration tool → select “Prompt Tone Configuration” → click “Add Prompt Tone” → click “Open”. media.licdn.com After clicking “Open”, choose your custom tone file – the tool will auto‑fill the file path. media.licdn.com Click “Save” – the configuration tool part is now complete. 2.2 Adding the Custom Tone File Download or create your own tone file (e.g., water.mp 3 or .wav). Add the file to the extra_tones folder (follow the same structure as existing tones). Use an English name for the file (e.g., water.*). media.l...