LiveSpec vs DecibelRTA

LiveSpec is the audio analyzer you can carry into any room. Point it at a stage, a sanctuary, or a stream feed and see exactly what is happening, then fix it with confidence. Whether you tune arenas for a living or run the board at church on Sunday, the tools are the same and they are all included. RUN THE SHOW Real time analyzer with sharp, smooth traces and a 3D view that shows how the spectrum moves. Spectrograph that unfolds your sound over time, so feedback and rumble have nowhere to hide. SPL monitor with A and C weighting, LAeq and LCeq, a stoplight for your limit, and logging you can export to prove how loud the night really was. Dose meter with NIOSH and OSHA standards, so you know how much safe listening time is left. Live Mix plugin host that runs Audio Unit plugins on your stream or broadcast feed, with input and output meters and LUFS targets. Mix Balance targets that give your whole team one standard to mix to, every night. Auto EQ with Smart Listen that hears the mix and suggests the correction, then lets you shape it. TUNE THE SYSTEM Transfer function with phase and coherence, so you can trust what the trace tells you. Impulse response, delay finding, and speaker alignment, with multiple microphones averaged into one picture. Decay, waterfall, RT60, and harmonic distortion views when you need to look deeper. Parametric and Graphic EQ with profiles that match the grid of popular consoles and processors, so what you design is what you can actually dial in. Signal generator with popular noise types, sweeps, and a playlist for your reference tracks. Setup wizard that finds your interface, checks your channels, and has you measuring in about a minute. MADE FOR THE JOB Works with the built in microphone or any USB audio interface, from a single mic to a full multichannel rig. Calibration files for your measurement microphones. Measurement configurations, targets, captures, and settings sync between your iPhone, iPad, and Mac through iCloud. Dark themes designed for a dim front of house position, with every panel readable at arm's length. ONE PLAN, EVERYTHING INCLUDED Start with a 14 day free trial. All Access is $17.99 per month or $149.99 per year and covers every feature on every device signed into your Apple account. After the trial the subscription renews at the plan price unless you cancel at least 24 hours before the trial ends. No add ons, no tiers, nothing held back. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple account, and you can manage or cancel in your account settings at any time. Privacy policy: https://linearphase.com/privacy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

DecibelRTA is an ultra-fast, professional real-time acoustic analyzer combining a fractional-octave IIR spectrum analyzer and an advanced IEC sound level meter on a unified display. Engineered with a native, zero-latency DSP core, DecibelRTA displays 11 vital acoustic metrics simultaneously without requiring navigation through menus: 11 METRICS AT A SINGLE GLANCE • Instant Spectral Pitch: Dominant musical note (e.g. A#2), frequency (Hz), and exact level (dB). • Core Metrology Chips: Leq 5s (equivalent continuous level), ACUM (psychoacoustic sharpness), LRA (Loudness Range dynamic spread), L50 (median ambient level), and CRST (crest factor). • Standard SPL Bar: SLOW (1s), FAST (125ms), and instant PEAK decay monitoring. HIGH-PRECISION SPECTRUM ANALYZER (RTA) • 3, 6, 12, and 24 bands per octave constant-Q filter bank (up to 240 selective IIR bands). • Contextual dual-path engine delivering sharp low-frequency transient tracking below 280 Hz. • Real-time spectral centroid, active -3 dB bandwidth marker, and continuous peak-hold curve. • Linear regression spectral tilt line (beta) for instantaneous noise color identification (pink, white, brown noise). • Built-in industry reference target curves (Flat, Audiofrog, Harman Room, JBL House, B&K Optimum) with a ±3 dB tolerance corridor. IEC 61672 SOUND LEVEL METER & STATISTICS • Type-standard A-weighting with true-RMS exponential ballistics (FAST / SLOW). • Continuous 5-second sliding Leq and sliding statistical histogram (L10, L50, L90). • Dual-mode dynamic range: Studio Mode (30 to 100 dB) and LIVE Mode (50 to 120 dB). • Fast overload CLIP warning and color-coded acoustic safety levels. BUILT FOR SOUND PROFESSIONALS • Live sound engineers & FOH: Quick feedback detection and stage SPL limits. • Studio & Mastering: Mix tonal balance, dynamic compression (LRA), and high-frequency fatigue check (ACUM). • Car Audio & Hi-Fi: In-cabin acoustic calibration and speaker alignment against target curves. • Acoustic & Industrial Hygiene: Noise floor surveys (L90) and OSHA/NIOSH threshold tracking. Microphone access is strictly processed on-device in real-time. No audio data is ever recorded, stored, or transmitted.