Spektrum

Spektrum is a versatile audio analysis and visualization app designed for musicians, podcasters, and audio engineers who need precise spectral insight on Android devices. It combines real-time FFT analysis, intuitive touch controls, and exportable data to make frequency monitoring and troubleshooting fast and painless.

What it does at a glance

Spektrum turns your phone into a portable spectrum analyzer. It visualizes frequency content with adjustable resolution and persistence, displays live spectrograms, and provides numerical readouts like peak frequency and RMS levels. The app focuses on clarity and speed so you can diagnose room acoustics, monitor recordings, or tune instruments on the fly.

Core capabilities

• Real-time FFT — configurable block sizes and overlap let you trade time resolution for frequency precision.
• Spectrogram view — persistent history helps spot tonal drift, noise bursts, or repeating artifacts over time.
• Peak detection — automatic and manual peak markers identify dominant frequencies.
• Calibration tools — simple SPL calibration and reference tone support make measurements more accurate.
• Export and logging — save snapshots or export CSV data for deeper analysis on a desktop.

User interface and workflow

The design prioritizes quick access to critical controls. Sliders and pinch-zoom gestures change frequency range and time window without digging through menus. Contextual tooltips explain each control, making complex DSP settings approachable even if you are new to spectral analysis. Spektrum’s layout separates live visualization from measurement readouts so you can keep eyes on the graph while monitoring numbers.

Customization and display options

Spektrum includes several display modes: linear and logarithmic frequency scales, different color palettes for the spectrogram, and smoothing algorithms to reduce flicker. Users can store presets for common setups — for example, a vocal mic preset with narrowband smoothing and an instrument preset with wider FFT size. Dark and light themes help when working in studios or bright environments.

Performance and device compatibility

On modern Android hardware, Spektrum processes audio with low latency and stable frame rates. The app supports internal microphone input as well as external USB and Bluetooth audio sources where permitted by the device. CPU usage is modest but increases with higher FFT sizes and longer persistence settings; the app offers a performance mode to reduce resource load during lengthy sessions.

How to get accurate results

• Use a calibrated mic when absolute SPL matters; internal mics are fine for relative comparisons.
• Choose FFT size according to the frequency detail you need—larger sizes give better resolution at the cost of time responsiveness.
• Enable averaging to smooth out transient spikes before capturing data for export.
• Record 10–20 seconds of steady audio when you need a reliable snapshot of room or instrument behavior.

Practical scenarios where it helps

Musicians can use Spektrum to find resonant frequencies and guide EQ adjustments. Podcasters and field recordists can spot noise sources and decide whether to re-record or apply filters. Live sound technicians can quickly verify that a problematic feedback frequency is being attenuated after changes to the soundboard.

Tips for new users

• Start with the default preset and experiment by changing one parameter at a time.
• Compare the spectrogram and peak readout together to distinguish steady tones from transient noise.
• Save a preset for each microphone or instrument you work with regularly.
• Use short recordings and CSV export to compare measurements across sessions.

Getting started and installation

Installing Spektrum is straightforward: download from the app store, grant microphone permission, and run the calibration assistant if you require SPL accuracy. The first-run tutorial walks through tuning FFT size, choosing a color map, and exporting a sample. Regular updates add support for new external audio interfaces and incremental performance improvements.

For anyone who needs immediate, visual feedback about sound, Spektrum provides a compact, flexible toolkit. It balances advanced analysis features with a clean interface, making it useful for professionals and hobbyists alike.