Amazon.com: SparkFun MP3 Trigger - 18 Trigger inputs to Alternate Functions Random & sequential Track Selection Transport Controls Even Volume up/Down Real-Time Volume Control Full-Duplex Serial Control : Electronics
MP3 Trigger v2 - WIG-09715 - SparkFun Electronics
Sparkfun MP3 Trigger Board - Printed Droid
Adafruit Audio FX Sound Board - WAV/OGG Trigger with 2MB Flash : ID 2133 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Looking for a cheap mp3/wav/ogg trigger board like this, but that is polyphonic (can play multiple mp3s simultaneously) : r/arduino
FN-BC10 MP3 Player 10 Trigger Input MP3 Module 10 Trigger MP3 Player Sound Module with 3W Class D Amplifier _ - AliExpress Mobile
Voice Playback Module MP3 Player I/O Trigger UART Control SD/TF 5W For – diymore
MP3 Trigger - WIG-13720 - SparkFun Electronics
Voice Sound Playback Module Arduino MP3 Player Module UART I/O Trigger Class D Amplifier Board 5W 8M Storage DY-SV8F SD/TF Card