Spek Spectrogram analyzer vs Audio Spectrum Pro

Professional audio spectrum analysis and spectrogram visualization for engineers, producers, creators, and audio enthusiasts. Spek transforms audio into a detailed visual spectrogram, allowing you to inspect frequencies, identify compression artifacts, evaluate audio quality, and explore how sound changes over time. Whether you're mastering music, verifying lossless audio, analyzing recordings, or troubleshooting noise issues, Spek provides powerful analysis tools directly on your device. Built with performance and privacy in mind, all audio processing is performed locally on your device. No audio files are uploaded, and no analysis data leaves your device. PROFESSIONAL AUDIO ANALYSIS Import audio files and instantly generate detailed spectrograms that reveal the frequency content of your recordings over time. Use Spek to: • Verify audio quality and detect compression artifacts • Identify frequency cutoffs caused by lossy encoding • Check whether a file is truly lossless or an upscaled source • Analyze background noise and unwanted frequencies • Inspect dynamic range and spectral balance • Examine left and right audio channels independently • Explore detailed frequency information throughout an entire recording SUPPORTED AUDIO FORMATS Analyze a wide range of popular audio formats, including: • WAV • AIFF • MP3 • AAC • M4A • FLAC • OGG Advanced decoding and file validation help ensure reliable analysis, even when audio files contain metadata issues or damaged container structures. HIGH-RESOLUTION SPECTROGRAMS Customize the analysis engine to match your workflow: • Multiple FFT sizes (1024, 2048, 4096, 8192) • Adjustable overlap and time density settings • Selectable window functions including Rectangular, Hann, and Hamming • Configurable minimum and maximum dB ranges • Multiple color palettes for enhanced visibility Fine-tune the balance between frequency resolution and time resolution to reveal exactly the information you need. Navigate large spectrograms with ease: • Pinch to zoom • Smooth pan navigation • Linear frequency scale • Logarithmic frequency scale • High-detail deep zoom rendering • Fast viewport updates and responsive interaction Explore both broad frequency trends and microscopic spectral details without sacrificing performance. Listen while you analyze. Spek includes an integrated audio player with a synchronized playhead that moves across the spectrogram in real time. Quickly correlate what you hear with what you see and locate specific events within the audio. Features include: • Real-time playback synchronization • Moving visual playhead cursor • Optional playhead following mode • Efficient rendering for smooth performance Visualize incoming audio directly from your microphone. Monitor environmental sounds, voices, instruments, and test signals in real time through a continuously updating spectrogram display. Ideal for: • Acoustic inspection • Noise identification • Equipment testing • Educational demonstrations • Sound design experimentation Share or archive your analysis results with high-resolution spectrogram exports. Export: • Full spectrograms • Current viewport selections • Professional-quality PNG images Perfect for reports, documentation, presentations, and collaboration. Spek is useful for: • Audio Engineers • Music Producers • Mastering Engineers • Podcasters • Sound Designers • Archivists • Collectors • Researchers • Students and Educators Whether you're validating audio sources, investigating recordings, or studying sound behavior, Spek provides the tools needed for accurate visual audio analysis. FAST, PRIVATE, AND OFFLINE Your privacy matters. • No account required • No audio uploads • No cloud processing • No user tracking by the app itself • 100% local audio analysis Audio decoding, FFT processing, and spectrogram rendering are performed directly on your device, giving you complete control over your files and data. Download Spek today and discover what your audio really looks like.

A professional audio toolkit for live sound engineers. Audio Spectrum Pro is a complete measurement suite on your iPhone: spectrum analyzer, chromatic tuner, oscilloscope, loudness meter, test-signal generator, and RT60 reverberation time measurement. Everything in one app, with a dark interface built for the stage and the concert hall. SPECTRUM ANALYZER Real-time spectrum from 50 Hz to 16 kHz on a logarithmic scale. Automatic peak detection highlights problem frequencies instantly. The "EQ Suggestions" panel tells you which band to cut and by how many decibels - before feedback ever happens. CHROMATIC TUNER High-precision pitch detection accurate to hundredths of a cent. Supports guitar, bass, violin, viola, cello, ukulele, mandolin, banjo, and a chromatic mode. Adjustable A4 reference, capo support, and a noise gate to reject bleed from the PA. OSCILLOSCOPE Real-time waveform display for signal-integrity checks, phase inspection, and clipping detection. The first thing you reach for when something sounds wrong. LOUDNESS METER Simultaneous RMS and true-peak readout with a scrolling history graph (120 frames). Watch your average level and catch peak spikes before they slam your limiters. TEST-SIGNAL GENERATOR Pink noise, white noise, a logarithmic sine sweep (20 Hz to 20 kHz), or a fixed tone from 50 Hz to 8 kHz - all played through the speaker while the mic keeps analyzing. Tune PA systems, ring out monitor wedges, and find room resonances without a separate signal generator. RT60 REVERBERATION ANALYSIS Tap Start, make an impulse (a clap, a click, or a sine sweep) - the app records the decay, computes T20, and extrapolates RT60. Size up a room's acoustics in seconds and know whether they're working for you or against you. BUILT FOR THE FIELD - Mic gain control with the volume buttons - one hand, while the other stays on the console - Fully dark interface - readable under stage lighting, easy on your night vision - Landscape orientation - lay it on the meter bridge or a side table - Three interface languages: English, Russian, Ukrainian Microphone access is required. A speaker or headphones are needed to play test signals.