Chapter 3. application solution
3.2.13 Do you have relevant study materials for ESP-SR GitHub?
Please refer to ESP-SR User Guide.
3.2.14 Do you have relevant study materials for ESP-DL?
Please refer to How to deploy hand gesture recognition with ESP-DL.
3.2.15 How does ESP32-S3 customize English command words for recognition?
• For MultiNet6, you need to prepare commands_en.txt to customize English command words. For Multi-
Net5, you need to use the multinet_g2p.py script to convert English command words into phonemes that
can be recognized by multinet. For details, please refer to esp-sr/tool.
3.3 AT
For ESP-AT FAQ, please go to ESP-AT User Guide.
3.4 Audio development framework
3.4.1 What is the maximum power of supported speakers for ESP32 series audio devel-
opment board?
• ESP32 development board uses NS4150 PA by default, and its maximum power is 3 W according to its
datasheet.
3.4.2 Does Alexa solution have certain requirements for environmental noise?
• The current Espressif voice solution can meet the environmental requirements of a signal-to-noise ratio of less
than 5dB, and for some xed noise scenarios, it can also be less than 0dB (need to be optimized for the actual
product).
3.4.3 There is an AUX input on the ESP32 AI development board, can MIC be used to
pick up the sound?
• The ESP-ADF development framework can choose a variety of ways to pick up sound, including
MIC input and Line-in.
• The pick-up method is as follows:
Espressif Systems 25
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