# Biquadia: Audio & DSP Lab — Precision Audio & DSP Toolkit

> Precision Audio & DSP Toolkit (iPhone/iPad app by Maker Portal LLC.)

- Source: https://appshunter.io/ios/app/biquadia-audio-and-dsp-lab/id6789775886 (this page in markdown: same URL + `.md`)
- Developer: [Maker Portal LLC](https://appshunter.io/developer/1439459313)
- Category: Utilities, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 68 MB
- Languages: American English
- Released: 2026-08-15
- Data updated: 2026-09-10
- User reviews in markdown: https://appshunter.io/ios/app/biquadia-audio-and-dsp-lab/id6789775886/reviews.md

## What is Biquadia?

Biquadia is an acoustic engineering and audio analysis lab designed for audio engineers, researchers, and sound designers. It brings real-time DSP, acoustic measurement, spectral visualization, and spatial analysis directly to iOS and iPadOS.

[IN-APP PURCHASE DISCLOSURE]
Biquadia includes powerful core features completely free of charge. Advanced features marked below with [Requires In-App Purchase] require a Biquadia Pro subscription (Monthly with a 7-day free trial) or a Lifetime Purchase.

FREE FEATURES INCLUDED:
• DSP Lab: Real-time FIR/IIR filtering, parametric EQ, dynamics processing, live oscilloscope, and FFT spectrum analyzer.
• Analysis Lab: High-resolution FFT, pitch tracking, formant estimation, and real-time STFT spectrogram.
• Measurement Lab: Multi-sweep acoustic measurements, impulse response capture, and calibrated SPL analysis.
• Psychoacoustics & Codec Lab: Codec difference spectrograms, perceptual masking thresholds, and Bark/Mel scale overlays.
• Audio FX & Signal Generator: Sine, frequency sweeps, pink/white noise generator, plus chorus, drive, and delay visualization.
• System & Audio Hub: System performance diagnostics, multi-channel I/O mixer, and live signal routing meters.

PRO FEATURES [REQUIRES IN-APP PURCHASE]:
• Target-Speaker Extraction [Requires In-App Purchase]: Experimental on-device Core ML model that isolates one enrolled voice from a mixture using its speaker embedding — a technology demonstration, not a general-purpose noise remover.
• Advanced Array Processing [Requires In-App Purchase]: Covariance-based MVDR beamforming for multi-microphone arrays (up to 32 channels).
• Ambisonics & Spatial Audio [Requires In-App Purchase]: First-Order Ambisonics (FOA) encoding, 3D scene rotation, and binaural room impulse response decoding.
• Measurement Data Export [Requires In-App Purchase]: CSV export of per-band THD+N/SNR measurement data.

IN-APP PURCHASE OPTIONS:
- Biquadia Pro Monthly: $4.99/month (Auto-renewable subscription with a 7-day free trial).
- Biquadia Pro Lifetime: $79.99 (One-time non-consumable purchase).

Biquadia processes audio entirely on-device. It has no developer-operated backend, telemetry, or audio upload. Network activity is limited strictly to Apple StoreKit and user-selected external links.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Biquadia Pro Monthly | $4.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Biquadia Pro Lifetime | $79.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-15

No release notes.

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All apps by Maker Portal LLC: https://appshunter.io/developer/1439459313

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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 2026-09-10.*