Reverb Karaoke Machine

Audio Processing
Filters
Op Amps
DAC
Arduino
Soldering
Reverb Karaoke Machine

Circutry inside our custom-printed microphone-shaped casing.

Built a custom karaoke machine that adds compression and reverb to the audio of the singer. Key features: - Built passive high-pass & low-pass filter stages with op-amp buffers to condition microphone signals for Arduino ADC - Developed Arduino signal processing firmware at 8 kHz sample rate, featuring dynamic compression and reverb effects - Engineered 10-bit R-2R DAC with low-pass output filters to reconstruct & smooth processed audio for speaker playback
Reverb Karaoke Machine image 1

Close-up of the Arduino DAC output.