Can Esp-Dsp Fft Run 4096, 8192 And More Samples; How To Connect A Microphone With Esp32; Does Esp32 Support Analog Audio Output Or Digital Audio Output; What Audio Formats Does The Esp32 Chip Support - Espressif Systems ESP Faq

Chapter 3. application solution

3.4.8 Can ESP-DSP fft run 4096, 8192 and more samples?

• Yes, up to 32 K samples are supported. The maximum number can be configured in menuconfig, e.g., for
demo, go to idf.py menuconfig-->Component config-->DSP Library-->Maximum FFT
length-->(*)32768.

3.4.9 How to connect a microphone with ESP32?

• You can connect I2S peripheral if it is a digital microphone.
• You can connect ADC peripheral if it is an analog microphone.

3.4.10 Does ESP32 support analog audio output or digital audio output?

• ESP32 supports DAC analog audio output for simple outputs such as tones. But if you use it for music playing,
the effect will not be so desirable.
• ESP32 supports PWM analog audio output, which has slightly better effect than DAC. The demo code is at
esp-iot-solution.
• ESP32 also supports I2S digital audio output. For I2S configurable pins, please see
Peripherals and Sensors.

3.4.11 What audio formats does the ESP32 chip support?

The ESP32 chip supports audio formats such as MP3, AAC, FLAC, WAV, OGG, OPUS, AMR, G.711,
etc. Please refer to the

3.4.12 How to use the ESP32 chip to decode compressed audio?

• Application examples that use the ESP32 chip to decode compressed audio can be found under the
adf/examples/recorder

3.4.13 Where is the code example for ESP-LED-Strip?

• Code examples for ESP-LED-Strip are provided in the ESP-ADF repo, please refer to

3.4.14 Does ESP32 support online voice recognition?

• Yes. Please refer to esp-adf/examples/dueros.

3.5 BLE Mesh development framework

Espressif Systems
ESP-ADF SDK for instructions.
folder.
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ESP32 Datasheet > Chapter
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led_pixels example.
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