AU Studio vs Bass Resonance
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AU Studio
This app acts as a dedicated host for Audio Unit extensions, allowing musicians and developers to inspect, audition, and test installed audio plugins. It provides detailed information about each unit's capabilities and behavior without requiring a full digital audio workstation.
- Scan and catalog installed Audio Units
- Filter plugins by developer, type, and status
- Load AUv3 interfaces or use detailed inspector
- Inspect registry identity, MIDI support, and parameters
- Route CoreMIDI sources and audition audio effects
- Monitor runtime CPU and memory usage
- Built-in manual for guidance
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AU Studio is a focused Audio Unit host, not a DAW. Open the plug-ins you already own, hear them in seconds, and see exactly what they expose. Made for musicians, sound designers, and Audio Unit developers who need a fast, honest test bench. No session to build, no tracks to arm. Pick a unit from your catalog and its interface opens in a panel of its own, named and sized to the plug-in, with your host controls in a bar above it. Key features: - Scan the instruments, effects, music effects, generators, and MIDI processors already installed on your device: AUv3 on iPhone, iPad, and Apple Vision Pro, plus AUv2 on Mac. - Filter by developer, type, or search text, and hide Apple built-ins to focus on third-party gear. - Open a plug-in's own interface when it ships one, and fall back to a metadata view when it doesn't, with the full inspector always one tap away. - Inspect identity, four-character codes, version, sandbox and cached validation status, MIDI support, busses, parameters, presets, latency, and tail time. - Step through factory presets, then save your own working state without leaving the interface. - Play instruments from the floating MIDI keyboard: notes, pitch bend, mod wheel, auto, mono or poly voicing, a shiftable range, and one-tap panic for stuck notes. Your hardware controller lights up the on-screen keys as you play. - Run a guitar, a microphone, or any channel of your interface through a loaded effect. Pick the device, pick mono or stereo, pick the channels. - Load a track into the floating media player, scrub the waveform, loop a section, and play along with your live input at the same time. - Check a signal path in seconds with the built-in test tone. - Route external CoreMIDI sources in, and send generated MIDI back out to a CoreMIDI destination. - Test MIDI 2 units with automatic, MIDI 1, or MIDI 2 protocol selection: high-resolution notes, registered and per-note controllers, per-note pitch bend, discovered MIDI-CI Profiles, and a monitor showing raw or decoded MIDI going in and coming out. - Choose your output device on Mac, and set sample rate, buffer size, and which MIDI sources are enabled. - Keep host-process CPU and memory in view while you work. - Open unfamiliar plug-ins with less risk. AU Studio asks first when the system does not mark a unit sandbox-safe, and a peak limiter sits across the host output. - Read the built-in manual, fully searchable: discovery, routing, presets, hardware input, floating tools, troubleshooting, and developer notes. What AU Studio is: A focused host for discovering, opening, auditioning, and inspecting the Audio Units already on your device. It answers the practical questions: Is the unit visible? Does it load? Does it have an interface? What busses, parameters, presets, and MIDI capabilities does it expose? Does MIDI reach it? Does audio pass through it? What AU Studio is not: It is not a DAW. No multitrack recording, clip launching, timeline arrangement, piano-roll sequencing, MIDI learn, automation lanes, song export, or mastering tools. AU Studio ships no Audio Unit of its own — no instrument, no effect, no DSP engine. It hosts the units other apps provide and wraps them in host-owned routing, auditioning, and inspection. Discovery uses the system Audio Unit registry. If a provider app is not installed, not enabled, or not visible to the platform, AU Studio cannot invent it. Interface behavior, presets, parameter meaning, MIDI mapping, and DSP results belong to each Audio Unit.
Bass Resonance
Enhance the low-end of your audio tracks with focused resonance. Add weight, punch, and controlled sub energy to instruments and vocals without introducing mud. Quickly shape your bass frequencies for a bigger, clearer sound.
- Focused low-end resonance circuit
- Add size, punch, and sub energy
- Tune fundamental resonance point
- Control sub buildup, reduce mud
- Fast, musical interface
- Standalone, AUv3, and IAA support
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BASS RESONANCE Add deep, focused low-end resonance without mud. RESONANT LOW-END ENHANCEMENT Shape the weight and depth of your tracks with a focused bass resonance circuit designed to add size, punch, and controlled sub energy. Bass Resonance is modeled on the legendary Little Labs Voice Of God* 500 Series, bringing focused low-end resonance and weight to your mixes. TUNE THE FUNDAMENTAL Sweep the resonance point to lock the low end to the source, from huge kick drums and bass guitars to vocals, synths, and drums. BIGGER SOUND, LESS MUD Enhance the lows you want while keeping unnecessary sub buildup under control, helping tracks feel larger without clouding the mix. FAST, MUSICAL CONTROL A simple, direct interface lets you dial in powerful low-frequency character in seconds, from subtle body to massive bass reinforcement. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect *Legal Disclaimer: Little Labs, Voice Of God is trademarks or registered trademarks of Little Labs. Bass Resonance was developed by Nembrini Audio SRL based on its own modeling techniques. Little Labs has not endorsed nor sponsored Bass Resonance in any manner, nor licensed any intellectual property for use in this product.
Screenshots
Verdict
The clearest difference is rating: Bass Resonance at 5.0 against AU Studio's 4.5. Bass Resonance also leads on review sentiment (100% vs 67%) and price ($7.99 vs $9.99). On ratings volume, ads, in-app purchases and monetization model 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
AU Studio costs $9.99 and Bass Resonance $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Bass Resonance holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 67% of AU Studio's written reviews are positive against 100% of Bass Resonance's.
| Parameter | AU Studio | Bass Resonance |
|---|---|---|
| Price | $9.99 | $7.99 — better |
| Rating | 4.5 (4 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 — better | 2 |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, Mac, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Christian Thompson | Nembrini Audio |
Customer experience
AU Studio
Bass Resonance
In-app purchases
AU Studio
No in-app purchases
Bass Resonance
No in-app purchases









