# GtrEQ — Guitar EQ & Buzz Kill AUv3

> Guitar EQ and hum reduction audio effect plugin for tone sculpting. (iPhone/iPad app by Rob Jackson.)

- Source: https://appshunter.io/ios/app/gtreq/id6753975652 (this page in markdown: same URL + `.md`)
- Developer: [Rob Jackson](https://appshunter.io/developer/1072346998)
- Category: Music, Entertainment
- Price: $1.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 12 MB
- Released: 2025-10-15
- Data updated: 2026-08-13
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/gtreq/id6753975652/reviews.md

## What is GtrEQ?

GtrEQ Guitar EQ & Buzz Kill (AUv3)

GtrEQ is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic Pro or GarageBand.

Overview

GtrEQ is a 5-band EQ / tone-shaping effect made specifically for guitar players, with the 5 bands focused across the frequency spectrum where the guitar typically lives. The peak / resonance of each band is also more gentle compared to general-purpose EQs, so adjacent bands are very "interactive". This makes GtrEQ well suited for overall guitar tone "sculpting", as opposed to the surgical precision needed for targeting specific frequencies.

GtrEQ also includes an optional "Buzz Kill" filter to help reduce mains hum noise. This buzzing can be a problem sometimes with single coil pickup guitars. Depending on your situation, GtrEQ might not be able to kill the buzz completely, but it should help reduce it significantly without impacting your original guitar tone too much.

Controls

Buzz Kill - Sets the target frequency of the mains hum noise filters which will depend on where you are in the world. For example, UK is 50Hz and US is 60Hz. Setting the control to Off will bypass the mains hum filters entirely.

Reduction - Sets how much attenuation is applied to the mains hum noise. Ideally, you want to set this control so the noise is no longer noticeable, or is at least at a "manageable" level. Buzz Kill processing has been designed so that the original guitar signal is impacted as little as possible, but you may notice a less "full" guitar tone when the Reduction amount is at maximum.

Buzz Kill processing, when enabled, occurs before the EQ section.

EQ - Switches the EQ On or Off. This is a "soft switch" so is well suited for automation / MIDI CC control if your host supports it.

EQ Bands - Sets a +/-12dB boost or cut for each of the labelled frequency bands. You can think of each band as affecting bass, low mids, high mids, treble and presence, but because of their interactivity, they don't work independently. You might be surprised by the range of tones you can get with just five bands!

Out - Applies a final stage gain trim to the output at the very end of the internal signal chain, between -24dB and +12dB.

Shameless plug alert... ANALOGyAMP

GtrEQ partners really well with ANALOGyAMP, a retro guitar amp simulator. Placing GtrEQ before ANALOGyAMP in the signal chain allows GtrEQ to function as a boost, effectively driving the input stage of ANALOGyAMP harder. ANALOGyAMP has actually been designed to "take pedals well" albeit virtual ones! You could also use the EQ section in GtrEQ to accentuate the mid frequencies more, and roll-off the bass and treble sides in a similar way to a very famous green overdrive pedal when used primarily as a mid boost. And if you use a MIDI controller, you could potentially have four different virtual channels from two controller switch assignments, with no pops or clicks when you flip between them:

SW1 - Toggle Channel Gain on ANALOGyAMP (clean / crunch for example)
SW2 - Toggle EQ on GtrEQ (bypass / mid boost for example)

Alternatively, place GtrEQ after ANALOGyAMP to sculpt your tone further, with an EQ specifically designed for guitar.


For more info and support please visit:

www.waverley-instruments.com/robjackson

## Key features

- 5-band EQ for guitar tone sculpting
- Interactive EQ bands
- Optional "Buzz Kill" filter for mains hum
- Adjustable buzz reduction level
- Output gain trim control
- AUv3 compatible


## Frequently asked questions about GtrEQ

### What is GtrEQ?

GtrEQ is an audio effect plugin designed specifically for guitarists. It offers a 5-band EQ for tone shaping and a "Buzz Kill" filter to reduce mains hum noise.

### Does GtrEQ work on Mac and iOS?

Yes, GtrEQ is supported on Mac, iPhone, and iPad. It can run standalone or within compatible AU host applications like Logic Pro or GarageBand.

### How does the "Buzz Kill" filter work?

The "Buzz Kill" filter targets mains hum noise, with adjustable frequency settings (e.g., 50Hz for UK, 60Hz for US) and reduction levels. It aims to minimize buzz without drastically altering your guitar's tone.

### What is the price of GtrEQ?

GtrEQ is available for a one-time purchase of $1.99.

### How interactive are the EQ bands in GtrEQ?

The EQ bands in GtrEQ are designed to be interactive, meaning adjustments to one band can affect adjacent bands. This allows for more intuitive guitar tone sculpting rather than precise frequency targeting.

### Can GtrEQ be used with other music apps?

Yes, GtrEQ is an AUv3 compatible plugin, meaning it can be used within any AU host application on supported devices, such as Logic Pro or GarageBand.

### What is the age rating for GtrEQ?

GtrEQ has an age rating of 4+, making it suitable for a wide range of users.

### How often is GtrEQ updated?

GtrEQ was last updated on October 15, 2025, with version 1.0.1. The release date was also October 15, 2025.

## Version history (last 1 release)

### 1.0.1 — 2025-10-15

No release notes.

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## More apps by Rob Jackson

- [moodscaper](https://appshunter.io/ios/app/moodscaper/id1088768073)
- [pianoscaper](https://appshunter.io/ios/app/pianoscaper/id1177444402)
- [moodscaper SE](https://appshunter.io/ios/app/moodscaper-se/id1247452905)
- [touchscaper](https://appshunter.io/ios/app/touchscaper/id1250344299)
- [guitarscaper](https://appshunter.io/ios/app/guitarscaper/id1316544251)
- [moodscaper LE](https://appshunter.io/ios/app/moodscaper-le/id1435065372)

All apps by Rob Jackson: https://appshunter.io/developer/1072346998

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*