Polyphonic Sound - Audio from Scratch - Part 6 @weirdboyjim
Polyphonic Sound - Audio from Scratch - Part 6  @weirdboyjim
Uploaded January 2021 | Updated September 2026, 1 week ago
There was already groundwork in place to add a second channel so the circuitry here is quite straightforward. Much of it is a copy so I opted to make the schematic as well and tried to sync the two up, that wasn't quite as successful as I'd hoped but it should save some additional replication when I get to pcb design.

The programming for two channels was a bit more interesting and I hope the results speak for themselves. Most regular viewers would have seen my Christmas music demo already, in my rush to create that I forgot to record an introduction, so this intro was created after everything else.


The schematic ended up a bit cramped, I'll space that out a bit before you see it again (and replace the output enable line I deleted by accident).
Polyphonic Sound - Audio from Scratch - Part 6ALU (11: Arithmetic) - Making an 8 Bit pipelined CPU - Part 42Hardware Scrolling - VGA from Scratch - Part 4Volume and ADSR - Audio from Scratch - Part 4Analogue In - IO from Scratch - Part 2Constant Register 2.0 - Making an 8 Bit pipelined CPU - Part 78ALU  (9: Bitwise Logic) - Making an 8 Bit pipelined CPU - Part 34Pipeline PCB Solder & Test - Making an 8 Bit pipelined CPU - Part 83Coding 2, Divide - Making an 8 Bit pipelined CPU - Part 66Digital to Analogue and Analogue to Digital Conversion - IO from Scratch - Part 3LCD PCB - Making an 8 Bit pipelined CPU - Part 94ebay Logic Probe Kit
James Sharman |

Polyphonic Sound - Audio from Scratch - Part 6

SHARE TO X SHARE TO REDDIT SHARE TO FACEBOOK WALLPAPER