"See" the Sounds of Classic Mac Audio 🔊🍏

See the Sounds of Classic Mac Audio 🔊🍏 We're working on the Pico-Mac port https://github.com/jepler/pico-mac/tree/rp2350-fruitjam to Fruit Jam https://www.adafruit.com/product/6200 and one thing we really want to add is sound support for classic Mac games and HyperCard stacks. Audio on the hardware we're emulating is pretty straightforward: every scanline of the video generator also outputs one byte of PWM (Pulse Width Modulation) data. We have 370 horizontal lines—352 visible and 18 during the vsync—at a 60.15 Hz refresh rate, producing approximately 22.255 kHz audio. That data is written to memory address $1FD00 http://www.mac.linux-m68k.org/devel/plushw.php so all we have to do now is pipe that 8-bit PWM signal either out to a timer on the RP2350 microcontroller or To the TLV320DAC3100 I²S amplifier onboard Fruit Jam, for that sweet, sweet 'Wild Eep' https://www.facebook.com/adafruitindustries/videos/1873371666122621 Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ ----------------------------------------- #marchintosh #apple #tech