Comparison

Melthaven vs M8FX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Melthaven

This app provides a note-triggered phase shifter for guitarists, bassists, and synthesizers. It offers organic, rhythmic movement that syncs to your playing, with analog-modeled filters for diverse sonic textures. Enhance loops or create experimental sounds with its input-dependent modulation.

Highlights
  • Note-triggered phase shifting
  • Analog-modeled OTA filters
  • Responds to guitar and bass transients
  • Enhances pre-recorded loops
  • Input-dependent synth modulation
  • Low-latency engine
Features
Read full description

Melthaven is a note-triggered phase shifter built to give guitarists and bassists organic, rhythmic movement that syncs to their playing, rather than a fixed LFO. It's also highly suited for a number of synth basses and sounds with sharp attacks and fast decays. Its analog-modeled OTA filters provide deep resonance and character, ranging from wah-like effects to complex, shifting formant textures or even experimental tones, like bubbling or hard, slappy effects. For bright, harmonically dense signals – such as saturated or overdriven tones and synthetic sounds – the effect range also includes growls and glistening sweeps. FOCUSED ON BASS & GUITARS The effect was specially developed to respond to the frequency response and transient peaks of electric guitars and basses. Every pluck, pop, or pick attack re-triggers the phase sweep, effectively turning your rhythmic timing into the "engine" of the effect. USING LOOPS? BREAK THEM OPEN Add various resonant effects like growls, or vintage bark / quacks "after the fact." This unlocks a level of control usually lost the moment a loop is bounced. Instead of being stuck with locked-in sound design, you can now reshape the envelope of any pre-recorded sample, breathing new life into your loop library. FOR SYNTHS & SOUND DESIGN: INPUT DEPENDENT Soft signals like pads or heavy/layered effects can produce wild, unpredictable responses. While such use is outside the plugin's core design, the smoothing feature can tame these re-triggers, yielding a flow that can feel organic and physical in its instability when operating beyond the plugin’s transient-focused comfort zone. MOVING BEYOND ENVELOPE FILTERS The plugin uses low-latency note detection paired with its own envelope generator and LFO, allowing sculpting and even reshaping each note’s modulation profile or filter envelope. It even detects notes that hide under a consistent signal amplitude when using a traditional envelope follower. BASE FEATURES: - Built around a versatile preset from the Pro version to suit a wide variety of applications - Controls: feedback & panoramic position, attack & hold timings, LFO Rate - Smoothing: from envelope shaping to creating a weighted, fluid response, giving note sequences a sense of physical momentum - Low-latency engine: preserves natural playing feel when used as a real-time effect PRO FEATURES - Requires Pro Edition Upgrade (In‑App Purchase): - Additional envelope parameters, several envelope flavors with pre-mapped control subsets - Pro presets encompassing both strong and milder effects, including the quintessential rubber bass - Enhanced stereo phaser modes & internal stereo re-imaging modulator (for formant-like effects and more) - Vintage-style phaser feedback that can optionally build or ramp with each note onset (non-rampable in the base version) - Instant visual feedback via an audio scope with dual-channel envelopes overlaid on the input waveform TECHNICAL NOTES: - Place before creative effects (unless experimenting). It can be used before or after harmonic processing (saturation, amp sims) depending on your preference - Response may vary on sustained notes with shifting harmonic content - Not optimized for upright bass due to its reliance on sharp signal transients - Note detection involves statistical signal processing and confidence intervals. Weak transients and phantom notes could lead to a loss of output determinism, i.e. sensitivity to changes in certain project settings - While it offers multiple layers of real-time control, Melthaven operates primarily as an automatic effect; for full manual filter manipulation, please refer to RealPhase, a separate app PLEASE NOTE: • The Pro Edition Upgrade is offered as a one‑time In‑App Purchase • An AUv3-compatible host is required to use this app • Suported sampling rates: 44.1, 48, 96 kHz

About

M8FX

Features
Read full description

【Description】 M8FX is a revolutionary, portable multi-track effects processor app designed specifically for iPhone to turn your Dirtywave M8 Tracker into a powerful, live-performing mixing rig. Connect using a single USB-C cable. M8FX hooks up directly to your M8 Tracker (running firmware version 6.0 or higher), allowing you to apply independent effects to each individual channel (CH1–CH8) using your favorite iOS AUv3 plugins with seamless real-time BPM synchronization, and route the processed audio directly back to the M8 hardware. Optimized for a permanent "Portrait (Vertical)" screen layout on iPhone and built with a hyper-responsive JUCE 8 + React/TypeScript hybrid architecture, M8FX delivers a latency-free, hardware-style experience. Perfect for both deep sound design in the studio and chaotic dub-mixing on stage. 【Key Features】 Clean Single-Cable Connection: No bulky adapters or messy wiring. A single USB-C to USB-C cable is all you need to handle 8-channel bi-directional audio routing and MIDI synchronization. Per-Channel Insert & Return (v6+ Sync): Seamlessly integrate with M8 Tracker (v6.0+) to process individual tracks through up to four AUv3 effect slots in a chain, routing the polished sound directly back into the M8 master bus. Flawless BPM Sync & Beat Effects: Live MIDI clock synchronization enables flawless integration of tempo-synced beat effects, rhythmic modulators, and time-based delays that lock perfectly with your M8's groove. Portrait Multi-Touch Mixing UI: Tailored for effortless one-handed control on iPhone with a compact 4x2 channel grid. Perform dynamic, hardware-style live dubs using responsive Mute, Solo, and toggling between Momentary/Latch send modes. 4 Macro Sliders & Dramatic Drop Controls: Maps vital AUv3 parameters to four thick macro sliders (M1–M4) for fluid hands-on control. Build massive tension by unleashing all sends simultaneously with the "ALL SEL" button, then trigger a clean drop in a split second with the pink "RST" (Reset) button. 【System Requirements】 Supported Hardware: Dirtywave M8 Tracker (Model:01 & Model:02) Required M8 Firmware: Version 6.0 or higher (for multichannel USB audio sending and return routing) Compatible Devices: USB-C equipped iPhones (iPhone 15 or later recommended) Setup Note: Please ensure "Microphone Permission" is allowed upon launch to enable USB-C audio inputs.

Screenshots

Melthaven3 screens
M8FX1 screens

Verdict

The call

The clearest difference is in-app purchases: M8FX at none against Melthaven's 1. Melthaven's advantage is price ($2.99 vs $4.99). On ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Melthaven costs $2.99 and M8FX $4.99 up front. Melthaven sells 1 one-off in-app purchase. M8FX asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Melthaven versus M8FX: the parameters behind the verdict, then further details
ParameterMelthavenM8FX
Price$2.99 — better$4.99
Rating5.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 6 weeks—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.0 — better
Further details — not scored
Size23 MB11 MB
Age rating4+4+
DeveloperquantovoxKeisuke Kagoshima

In-app purchases

1 purchases

Melthaven

One-time1
  • Melthaven Pro$4.99
None

M8FX

No in-app purchases

Questions

Is Melthaven free?
Melthaven costs $2.99, and also offers in-app purchases.
Is M8FX free?
M8FX costs $4.99, with no in-app purchases.
Do Melthaven or M8FX have ads?
Neither Melthaven nor M8FX shows ads.

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