Build a Polyphonic Synth in Puredata / Plugdata – Full Tutorial

video upload by Floyd Steinberg

"🎹 Want to build your own polyphonic synthesizer from scratch? In this hands-on tutorial, you'll learn how to create a powerful synth in Puredata / Plugdata, covering everything from MIDI input to oscillators, envelopes, filters, LFOs, and polyphony management.

✅ Perfect for beginners and intermediate sound designers ✅ No external plugins required – just Puredata / Plugdata ✅ Includes a full demo and downloadable patches

📚 Topics Covered:

Creating a mono synth and expanding to polyphony
Avoiding aliasing in digital synthesis
MIDI integration and note handling
Envelopes, filters, and delay effects
Using abstractions, cloning, and data packing
Final demo with reverb (Blackhole)

📌 Timestamps:
00:00 Demo (dry signal)
00:23 What’s in this video?
00:57 What makes a polyphonic synth?
01:52 Building a mono synth
02:29 Aliasing explained
03:17 Anti-aliasing strategies
04:11 MIDI input setup
04:41 Envelope creation
06:13 Handling sustained notes
07:45 Adding a resonant low-pass filter
08:18 Polyphony management
08:30 Isn’t this brilliant?
10:11 Abstractions & modular design
12:10 Note distribution
12:50 Object cloning
13:04 Data packing/unpacking
14:34 Delay line & bug fix
15:15 Final thoughts
15:33 Reverb-enhanced demo

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