Spectrum Analyzer

Spectrum Analyzer free spectrum-analyzer by Seven Phases

Spectrum Analyzer is a free spectrum analyzer VST plugin developed by Seven Phases. Compatible OS(s): Windows.

Spectrum Analyzer is a real-time spectrum analysis VST plugin. The idea was to create an old-fashioned tool reminiscent of classic hardware analyzers of the earlier centuries. Unlike most of other analyzers available these days, this plugin is not FFT-based but utilizes a filter-bank algorithms that mould its unique pros and cons.

Features:

  • 1/3, 1/4 or 1/6 octave mode (30, 40 or 60 bands respectively).
  • Simultaneous peak, peak-hold and average (RMS) display.
  • Bar, Curve and Curve Fill modes.
  • Entirely adjustable ballistics.
  • Unrestrictedly resizable display window.
  • Customizable colors.
  • Supports any sample rate.

https://sevenphases.wordpress.com/

Spectral Eye

Spectral Eye free oscilloscope by Secret Base Design

Spectral Eye is a free oscilloscope plugin developed by Secret Base Design. Compatible OS(s): iOS.

Spectral Eye analyzes incoming audio signals to extract the underlying frequencies. Most sounds are built up from a variety of sine waves; a simple whistle might be a single wave, while a guitar, piano, or the human voice have many waves added together.

By using a Fast Fourier Transform, sound can be decomposed into each frequency. Normally, this information is displayed on a chart, and there are number of excellent apps that do exactly this. Spectral Eye rearranges the FFT into a spiral, so that frequencies that are an octave apart are lined up as rays from the center of the display. The strength of each frequency is represented by the size of a red circle.

Play music, and Spectral Eye will reveal the frequencies. For a guitar, it’s easy to see that in addition to the root frequency of a note, there are also a number of harmonic frequencies — and these change based on the strings used, the pickups, and the amplification system. It’s the frequencies present in the notes that make a Telecaster sound different from a Les Paul, and a piano different from a trumpet. Play an instrument, music from your iTunes library, or have it listen to whatever sounds are nearby — the display is fun to watch.

If you’re interested in understanding the nature of sound, use Spectral Eye to get a better view. The app was created as a utility used in the development in other Secret Base Design apps; we’re making it freely available, because we found it to be useful, and thought others might like it too.

The app will remain free, and will not have ads. If you find it useful, we would very much appreciate a review in the app store, and you can get in touch with us through our support site, our Facebook page, or Twitter.

Have fun with the app, and we hope you enjoy opening your Spectral Eye!

http://secretbasedesign.com/apps

SPAN

SPAN free spectrum-analyzer by Voxengo

SPAN is a free spectrum analyzer VST, VST3, Audio Unit, AAX plugin developed by Voxengo. Compatible OS(s): Windows 64b, macOS.

SPAN is a real-time “fast Fourier transform” audio spectrum analyzer plug-in for professional music and audio production applications. For the most part it was derived from Voxengo GlissEQ dynamic parametric equalizer and reproduces its spectrum analysis functionality.

Features & Compatibility:

  • Output signal power statistics.
  • K-metering.
  • Internal channel routing.
  • Undo/redo history.
  • Clipping statistics.
  • Multi-channel analysis.
  • Channel grouping.
  • A/B comparisons.
  • Correlation meter.
  • Mid/side analysis.
  • Preset manager.
  • Contextual hint messages.

https://www.voxengo.com/

Sound Rider

Sound Rider free spectrum-analyzer by Polygon Audio

Sound Rider is a free spectrum analyzer VST plugin developed by Polygon Audio. Compatible OS(s): Windows.

Sound Rider is a 3D visualizer that gives you the ability to navigate a 3D representation of a sound signal in your DAW. As well as the traditional horizontal frequency scale and vertical decibel scale the 3D aspect provides a time axis into the screen.

Sound Rider was written for entry into the KVR Developer Challenge 2012.

Sound Rider Main Features:

  • High resolution 3D Visualizer.
  • Navigation of the waveform with control of position and orientation in 3D.
  • Written from scratch in C++ for 64 bit and 32 bit windows.
  • User views can be stored.
  • Averaging and peak display.
  • User peak values can be stored.
  • Position and orientation can be automated.
  • Includes a 2D view with statistical output.
  • 3 Rendering modes: Solid, Wireframe and Points.
  • Axis that can be moved in the Z plane for clear measurements.
  • Peak and RMS meter.
  • Settings can be altered to change key controls, smoothing, frame rate, ballistics etc.
  • Interpolation – the faster your machine the smoother the ride.

{See video at top of page}

KVRDC12

http://www.polygonaudio.com/

Sonogram SG-1

Sonogram SG-1 free sonogram by ag-works

Sonogram SG-1 is a free sonogram VST plugin developed by ag-works. Compatible OS(s): Windows.

Sonogram SG-1is a real-time sonogram allowing for fast and detailed spectral analysis.

Sonogram SG-1 Features:

  • Six scientific color palettes, each of them can highlight different dynamic ranges, from high power kick drum beats, to little spikes coming out from the noise floor.
  • Snapshots-per-second control that can be changed on the fly, to increase or decrease the time resolution.
  • At any time you can change the zoom ratio, without loosing frequency details for the signals which have already passed by.
  • The zoomed screen can be scrolled while analyzing, to easily locate the frequency range of interest.
  • Pause the visualization with the “freeze” control.
  • Both in frozen or running mode, every time you click or drag within the sonogram area, frequency and amplitude rulers highlight the values corresponding to that point.
  • Every palette can be shifted by simply dragging the dB ruler, to better contrast the right amplitude ranges.
  • A mark button is provided to highlight interesting parts of the waveform for subsequent individuation.
  • Every parameter supports host automation.

http://ag-works.net/

Sonic Visualiser

Sonic Visualiser free spectrum-analyzer by Centre for Digital Music at Queen Mary

Sonic Visualiser is a free spectrum analyzer plugin developed by Centre for Digital Music at Queen Mary, University of London. Compatible OS(s): Windows 64b, macOS, Linux.

Sonic Visualiser is an application for viewing and analysing the contents of music audio files. The aim of Sonic Visualiser is to be the first program you reach for when want to study a musical recording rather than simply listen to it.

As well as a number of features designed to make exploring audio data as revealing as possible, Sonic Visualiser also has powerful annotation capabilities to help describe what you find, and the ability to run automated annotation and analysis plugins.

Features include sophisticated spectrogram views; multi-resolution waveform and data displays; manual annotation of time points and curves; measurement capabilities from spectrogram and spectrum; playback at any speed; looping and playback of discontiguous selections; ability to apply standard audio effects and compare the results with their inputs; and support for onset detection, beat tracking, structural segmentation, key estimation and many other automated feature extraction algorithms via Vamp audio analysis plugins.

Sonic Visualiser contains features for the following:

  • Load audio files in WAV, Ogg and MP3 formats, and view their waveforms.
  • Look at audio visualisations such as spectrogram views, with interactive adjustment of display parameters.
  • Annotate audio data by adding labelled time points and defining segments, point values and curves.
  • Overlay annotations on top of one another with aligned scales, and overlay annotations on top of waveform or spectrogram views.
  • View the same data at multiple time resolutions simultaneously (for close-up and overview).
  • Run feature-extraction plugins to calculate annotations automatically, using algorithms such as beat trackers, pitch detectors and so on.
  • Import annotation layers from various text file formats.
  • Import note data from MIDI files, view it alongside other frequency scales, and play it with the original audio.
  • Play back the audio plus synthesised annotations, taking care to synchronise playback with display.
  • Select areas of interest, optionally snapping to nearby feature locations, and audition individual and comparative selections in seamless loops.
  • Time-stretch playback, slowing right down or speeding up to a tiny fraction or huge multiple of the original speed while retaining a synchronised display.
  • Export audio regions and annotation layers to external files.

The design goals for Sonic Visualiser are:

  • To provide the best available core waveform and spectrogram audio visualisations for use with substantial files of music audio data.
  • To facilitate ready comparisons between different kinds of data, for example by making it easy to overlay one set of data on another, or display the same data in more than one way at the same time.
  • To be straightforward. The user interface should be simpler to learn and to explain than the internal data structures. In this respect, Sonic Visualiser aims to resemble a consumer audio application.
  • To be responsive, slick, and enjoyable. Even if you have to wait for your results to be calculated, you should be able to do something else with the audio data while you wait. Sonic Visualiser is pervasively multithreaded, loves multiprocessor and multicore systems, and can make good use of fast processors with plenty of memory.
  • To handle large data sets. The work Sonic Visualiser does is intrinsically processor-hungry and (often) memory-hungry, but the aim is to allow you to work with long audio files on machines with modest CPU and memory where reasonable. (Disk space is another matter. Sonic Visualiser eats that.).

http://c4dm.eecs.qmul.ac.uk/

Signal Noise SN02-G VU Meter

Signal Noise SN02-G VU Meter free metering by Sender Spike

Signal Noise SN02-G VU Meter is a free metering VST plugin developed by Sender Spike. Compatible OS(s): Windows.

SN02-G is a no frills mono/stereo/mid-side needle VU meter VST plug-in. It features variable nominal reference level and an optional maximal value indicator (needle). It is optimized for 24” HDTV screens and is designed to occupy minimal screen real estate while still preserving comfortable readability and fast access to all controls at low ASIO/CPU levels.

The fundamental feature of this plug-in is its lack of features.

Details:

  • two-in-one – operates both as (dual) mono or stereo meter depending on the track.
  • four fixed nominal reference levels for 0dBvu (-12, -14, -18, and -20 dBFS).
  • switchable display of summed mono on both meters, LR, or M/S (stereo tracks only).
  • optional needle for indication of maximal value with hold duration of 1 second.
  • sample peak leds with hold duration of 300 ms.
  • scribble strip (can be “peeled off” by deleting all text).
  • switching between normal GUI and a larger version (1.45x).
  • all controls directly accessible from the front panel.

https://senderspike.wordpress.com/

Signal Analyzer

Signal Analyzer free spectrum-analyzer | oscilloscope by rs-met

Signal Analyzer is a free spectrum analyzer and oscilloscope VST plugin developed by rs-met. Compatible OS(s): Windows.

Signal Analyzer is a combined oscilloscope / spectrum-analyzer plugin for inspecting signals in real-time in the time- and frequency domain.

http://www.rs-met.com/

s(M)exoscope

s(M)exoscope free oscilloscope by Smart Electronix

s(M)exoscope is a free oscilloscope VST, Audio Unit plugin developed by Smart Electronix. Compatible OS(s): Windows 64b, macOS.

By Bram @ Smart Electronix.

s(M)exoscope is an oscilloscope VST plugin. You can use it to visually monitor audio wave forms.

Features:

  • Available as a Standard insert effect or as a special Modular version optimized especially for modular VST hosts like Plogue Bidule or AudioMulch.
  • Display controls – Time (number of pixels per sample) & Amp (amplitude of the waveform in the display).
  • Retrigger modes – Free, Internal, Rising & Falling – with Retrigger Threshold. External mode also available in the modular version.
  • Options – Sync Redraw, Freeze, DC-Kill & Channel.

The s(M)exoscope also contains a tool that can be used to analyze the waveform currently in the display. Based on where you place a marker, the tool analyzes the x and y dimensions of the waveform to calculate the following:

  • Selection amplitude (linear).
  • Selection amplitude (decibels).
  • Selection length (in samples).
  • Selection length (in seconds).
  • Selection length (in milliseconds).
  • Selection frequency (assuming that the selection is one cycle in length).

http://www.smartelectronix.com/

PSP VintageMeter

PSP VintageMeter free vu-meter by PSPaudioware

PSP VintageMeter is a free vu meter VST, Audio Unit, RTAS, DirectX plugin developed by PSPaudioware. Compatible OS(s): Windows, macOS.

PSP VintageMeter provides professional VU and PPM metering for mono and stereo tracks. All parameters like integration times and reference levels are widely adjustable to make this free plug-in suitable for any application. This plugin is used by top electronic music producers such as Fred Again or Skrillex

http://www.pspaudioware.com/