Optical converter to 2xRCA

4-channel stereo audio mixer module. It has one output to which the summed signal from 4 inputs comes out. It is powered with the voltage from 5 to 12 V

The ReSpeaker Lite kit with case, which uses the XMOS XU316 AI chipset and XIAO ESP32S3, offers precise audio processing with advanced features such as noise reduction and echo cancellation. Compatible with Raspberry Pi, Arduino and Home Assistant platforms, it is ideal for smart home applications, conference systems and smart speakers. Seeed Studio E24072601

The Spectrum Shield enables your Arduino with the capability of splitting a stereo audio input into 7-bands per channel. You can then read the amplitude of each channel using the ADC on your Arduino allowing you to control everything from LEDs to motors, pumps to relays, or even fire, all with sound. DEV-13116

Class D digital audio amplifier with Bluetooth module. It has two channels with a power of 50 W and can work with speakers from 4 to 8 Ω. It is powered with the voltage in the range from 9 to 24 V. NS-01G

Class D digital audio amplifier with Bluetooth 5.0 module. It has two channels with a power of 50 W and can work with speakers from 4 to 8 Ω. It is powered with the voltage ranging from 9 to 24 V

Mini MP3 player with 128 MB built-in memory. It can work as a separate device and play sounds or be controlled via the UART serial interface. DFRobot DFR0768

HiFi stereo tube amplifier based on 6J1 and 6P1 tubes. Designed for use with loudspeakers up to 3 W and an impedance of 4 Ω or 8 Ω

Stereo audio isolator based on two transformers. It allows to eliminate noise in the audio path resulting from different ground resistances of the sound source and the receiver. XH-M372

The XH-A232 audio amplifier module is based on the TPA3110 chip, offering 30W output power for each of the two channels in class D. Its compact dimensions (53 x 45 x 14mm) and low weight (19.5g) make it ideal for DIY audio projects with high quality sound.

LC filter connected to the output of the DC power supply with a voltage from 0 to 25 V and a maximum current of 3 A. It reduces voltage ripple and interference caused by the power supply

Two-way speaker crossover with a division frequency of 2500Hz/3000Hz. Works with 4 to 8 ohm speakers and offers up to 250 watts of power

Gravity: Analog Sound Sensor is a sound sensor with Gravity analogue output. The module can be supplied with 3.3 ... 5V voltage. DFRobot DFR0034

Multifunctional speech recognition module. Allows you to add speech recognition to your own application. The module can be used with any evaluation kit that has a UART interface. Sparkfun COM-15453

Three-way crossover with a crossover frequency of 900 Hz and 5000 Hz. It works with speakers with an impedance of 5 to 8 Ω and offers power up to 150 W

Stereo audio amplifier based on the TPA3116D2 chip. It can be powered from 12 to 26 V and has two 120 W outputs. XH-M543

BOB-09868 - Breakout Board for ADMP401 MEMS Microphone, SparkFun