Uploaded April 2026 | Updated September 2026, 2 weeks ago
Filter FM on the Korg Opsix is one of its most underrated superpowers.
This walkthrough breaks down how it works, why it behaves so differently from classic FM, and how to use it to create metallic hits, bell tones, subtractive‑style sweeps, and complex hybrid timbres. Everything is demonstrated visually on the analyzer so you can see and hear what’s happening.
Checkout my OPSIX sound pack! shopify.thedigitallifestyle.com/products/ms-20-collection-for-the-multi-poly-70-performances-that-channel-analog-grit?utm_source=copyToPasteBoard&utm_medium=product-links&utm_content=web
⏱️ Timestamps
00:00 Welcome
00:11 What Filter FM actually is
00:40 Quick FM refresher
00:58 Filter FM explained visually
01:17 Sawtooth + filter behaviour
02:06 Slow modulation → LFO territory
02:53 Audio‑rate modulation begins
03:14 Stepped waves + metallic buzz
04:01 Percussive envelopes for FM‑hybrid hits
04:52 Resonance‑like effects
05:53 Trying different modulator waves
06:23 Complex modulator stacks
06:40 Bell tone design
07:35 Ratio vs fixed mode
08:26 Adding pitch movement
08:57 Multi‑stack patch breakdown
09:46 Filter FM vs pure FM
10:27 What’s next
📣
Enjoying the Opsix deep dives? Subscribe so you don’t miss the ring‑mod and wavefolding episodes. And tell me in the comments what patch or sound‑design technique you want to explore next.
Filter FM on the Korg Opsix is one of its most underrated superpowers.
This walkthrough breaks down how it works, why it behaves so differently from classic FM, and how to use it to create metallic hits, bell tones, subtractive‑style sweeps, and complex hybrid timbres. Everything is demonstrated visually on the analyzer so you can see and hear what’s happening.
Checkout my OPSIX sound pack! shopify.thedigitallifestyle.com/products/ms-20-collection-for-the-multi-poly-70-performances-that-channel-analog-grit?utm_source=copyToPasteBoard&utm_medium=product-links&utm_content=web
⏱️ Timestamps
00:00 Welcome
00:11 What Filter FM actually is
00:40 Quick FM refresher
00:58 Filter FM explained visually
01:17 Sawtooth + filter behaviour
02:06 Slow modulation → LFO territory
02:53 Audio‑rate modulation begins
03:14 Stepped waves + metallic buzz
04:01 Percussive envelopes for FM‑hybrid hits
04:52 Resonance‑like effects
05:53 Trying different modulator waves
06:23 Complex modulator stacks
06:40 Bell tone design
07:35 Ratio vs fixed mode
08:26 Adding pitch movement
08:57 Multi‑stack patch breakdown
09:46 Filter FM vs pure FM
10:27 What’s next
📣
Enjoying the Opsix deep dives? Subscribe so you don’t miss the ring‑mod and wavefolding episodes. And tell me in the comments what patch or sound‑design technique you want to explore next.
