Sean Nakamura

A pitch block in front of a reverb gives one fixed octave. Inside the regeneration path it climbs forever. Here is the routing difference, and why a Helix cannot do it internally.

A POD Go preset you downloaded sounds thin and buzzy? The IR block is pointing at an empty slot. Here is how the IMPULSES column works and how to load your own impulse responses correctly.

An external feedback loop inserts a filter, pitch shifter, or drive into a delay's regeneration path, so each repeat gets more processed than the last. Here's how to wire it and dial it in.

Print one clean DI, then sum a re-amped real amp with an in-the-box amp sim. How to time-align a hardware round-trip against a zero-latency plugin and check polarity before they fight.

How much recording latency can a guitarist feel? The buffer-size-to- milliseconds math, the round-trip number that matters, and a monitoring setup with near-zero lag.

A standalone IR loader adds a speaker cab sim and a DI to anything in front of it — a bare overdrive, a preamp pedal, an amp's preamp out. Here's what they do, where they sit, and which one to buy.

The loop Send taps your preamp and the Return feeds your power amp — record a preamp DI, then reamp through just the power section and cab. Routing, levels, and the cab-block trap.

Put a drive pedal in front and it pushes the preamp; put it in the loop and it distorts an already-EQ'd signal. Here's the mechanism, the rare cases the loop wins, and the modeler translation.

When a pedal distorts or sounds thin in your amp's effects loop, the culprit is usually one spec: loop level. Here's how to tell line from instrument level and fix the mismatch.

A noise gate works best when it reads a clean signal but mutes a dirty one. Here's why the 4-cable method beats putting the gate inline, and how to route it on pedals and modelers.

A series loop runs 100% of your signal through your pedals; a parallel loop blends a dry path via a mix knob. Here's how to tell which you have and fix a weak delay in the loop.

CorOS 4.0 added Phase Doctor to automate dual-amp alignment on the Quad Cortex. What it measures, how to run it, what it fixes that a polarity flip can't, and when to still do it by ear.

In a dual-amp Helix or Quad Cortex preset, the compressor can sit before the split, on each path, or on the merged bus. Each choice changes the transient and the stereo image.

Two amp paths that partially cancel gut your low end before any compressor can help. The mono-sum test, the polarity flip, and the time alignment that find and kill the cancellation.

Voiced FRFR cabs (Quilter, Friedman, ASM-12) already have a speaker-emulated response. Running an IR-heavy preset into them is double-cab voicing. Here is how to rebuild the chain.

A high-impedance DI fixes most acoustic piezo tone problems. Long cable runs from a passive piezo need a buffer upstream of the DI. Here is when to add one and which to pick.

Where you put your powered FRFR cab changes the response your ears get and what the audience hears. We measured the four common placements and the EQ shift each one produces.

Four active DI boxes across a 6× price range. We measured noise floor, frequency response, and where each one actually belongs in a modeler-direct signal chain.

Two powered FRFR cabs at very different price points. We measured the frequency response, ran the same Quad Cortex preset through both, and figured out where the extra $500 goes.

A buffer pedal and a transformer DI both fix signal-line ground loop hum, but they work on different problems. Here's how to diagnose which one your rig actually needs before you buy.

A signal chain that goes stereo too early gets phasey and unfocused. One that goes stereo too late wastes the modulation and time effects that need both channels to do their work. Here is the rule that gets it right: dirt is mono, time is stereo, and the split point is the modulation block.

Analog delay pedals split into two chip camps: the bucket-brigade BBD is darker and more compressed with shorter times, while the PT2399 is brighter, quieter, and longer — but not strictly analog.

The Two Notes Torpedo Captor is the most common reactive load box in home studios, but the workflow guides online stop short of the actual signal chain. Here is the complete process from connecting the amp to landing a recordable signal in Ableton, Logic, or Pro Tools, including the IR loading step everyone gets wrong.

The JC-120's BBD stereo chorus and solid-state power stage interact in ways that resist digital emulation. Here's what's actually happening, and the closest approximations available in Helix, Quad Cortex, and plugins.

Line 6 names every Helix amp model after the real amp it captures, but with pseudonyms that obscure the original. This is the complete decode: Helix name, real amp, starting gain, and character notes.

The right IR turns a Helix amp model from competent to convincing. This is the reference guide for cab and IR pairings by amp family, with starting EQ corrections for each pairing.

Buffer vs true bypass looper: the practical decision framework for guitar signal chains. When a buffer solves your problem, when a true bypass looper does, and when neither matters as much as you think.

The HX Stomp inverted polarity cab trick explained: how splitting to two parallel cab paths and inverting one creates a wider, denser tone than any single cab block can produce.

Neural Captures are one of the Quad Cortex's most powerful features, and the most underexplained. Here's the complete workflow for capturing your own amp, from physical setup to a finished capture you can use on stage.

Volume jumps between presets are a solved problem. Here's the exact workflow for Helix, Quad Cortex, and Fractal Axe-Fx to get consistent output levels across your entire preset library.