Waveform
Watch the microphone signal react instantly as you speak, sing, clap or change recording level.
Test your microphone online and watch your audio come alive in real time. See the waveform, live frequency spectrum and scrolling spectrogram before running a short recording quality test.
Allow microphone access and the analyzer starts immediately. Speak, sing, clap or simply listen to the room and watch the incoming signal change across three live visualizations.
The live analyzer can run as long as you want. Start the test when you are ready to measure four seconds of room noise followed by ten seconds of normal speech or singing.
The live waveform, spectrum and spectrogram above remain active after the test. You can continue speaking, singing or changing microphone position and immediately see how the incoming signal changes.
Run the measured test again whenever you want to compare another microphone position, gain setting or room condition.
A simple mic test only confirms that a microphone works. This browser-based microphone test also lets you see the incoming signal as it happens.
Once microphone access is allowed, the waveform shows amplitude changes, the frequency spectrum displays the current distribution of spectral energy and the scrolling spectrogram shows how that frequency content changes over time.
You can then run a controlled 14-second recording test to measure input level, background signal, peaks, clipping and the difference between the quiet room and your voice.
Watch the microphone signal react instantly as you speak, sing, clap or change recording level.
See how the current microphone signal is distributed across low, mid and high frequencies.
Watch frequency energy build into a scrolling history as the microphone continues listening.
Measure the RMS level of the voice portion of the controlled microphone test.
Measure the incoming digital background level during a dedicated quiet stage.
Detect samples reaching digital full scale and identify recordings that may need lower input gain.
A useful audio recording test should resemble the recording you are preparing to make. Use the same microphone, approximately the same distance and realistic singing or speaking volume.
The live analyzer makes setup easier because you do not have to repeatedly record and wait for a result. Change the microphone position or gain and watch the level, spectrum and spectrogram respond immediately.
Use the Pitch Accuracy Test to measure how closely sung pitches match target notes.
The live spectrum continuously analyzes short sections of the incoming microphone signal. Frequency appears horizontally while relative spectral level appears vertically.
Speak, sing a vowel, move closer to the microphone or make another sound and the graph changes immediately. This makes frequency activity much easier to explore than a static result shown only after a test.
The graph describes the signal currently reaching the browser. The performer, room, microphone placement and recording chain all contribute to what you see.
The spectrogram turns the microphone signal into a moving visual history of frequency energy.
Frequency runs vertically. Time moves horizontally. New spectral information is drawn on the right side of the graph while older information moves toward the left.
Brighter areas indicate stronger relative spectral energy. A sustained vocal sound creates visible bands, while short sounds produce brief vertical events. Continuous environmental noise may create patterns that persist as the display scrolls.
The spectrogram shows what the microphone captured but does not automatically identify the physical source of every pattern.
A microphone quality test can identify measurable technical problems such as a weak captured signal, high background level or digital clipping.
The live visualizations provide additional information about the signal reaching the browser, but they do not decide whether a microphone is artistically appropriate for a particular singer, instrument or production.
Microphone character, performance, placement, acoustics and production goals still require listening. This tool is intended to make technical setup easier before recording.
The measured test compares the incoming signal while the room is quiet with the signal captured while you speak or sing.
During the first four seconds, remain quiet and avoid touching the microphone or desk. During the following ten seconds, use normal recording volume. The analyzer calculates the RMS level of both stages and reports their difference.
If the quiet-stage level is unexpectedly high, possible contributors include environmental sound, ventilation, computer fans, excessive input gain, microphone or preamp noise, and microphone placement.
Continue with a specialized tool when you want to analyze singing, pitch, voice characteristics, mixes or finished tracks.
Allow microphone access and select the input you want to use. The live waveform, frequency spectrum, spectrogram and input level start automatically. You can then run the optional measured recording test.
No. The live visualizations begin as soon as microphone access is granted. The Start button begins the separate 14-second recording quality measurement.
It shows the current microphone signal amplitude over a short period of time. Louder sounds create larger excursions around the center line.
It shows the relative distribution of spectral energy in the current microphone signal across the available audio frequency range.
It shows frequency energy over time. New information enters from the right while older spectral information moves left.
No. The spectrum represents the incoming recorded signal. Measuring the independent frequency response of microphone hardware requires a controlled reference source and measurement environment.
During the measured test, the analyzer checks whether captured samples reach digital full scale and also records the highest sample peak.
Not by this implementation. Microphone capture, live spectrum analysis and the measured test are processed by JavaScript in the browser. This code contains no audio upload endpoint.
Use the live analyzer to inspect your setup, or contact Ronter Sound for help with recording, production and audio workflow.
Contact Ronter Sound →Go beyond individual audio tools. Arrange multiple tracks, edit clips, build modular effect chains, add modulation, mix through a Master bus, save projects and export the finished mix to WAV.
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I build Ronter Sound Lab and the audio tools on this website as free resources for musicians, producers and creators. If these tools are useful to you and you would like to support the project, any voluntary contribution helps me continue developing the free online DAW, create new tools, improve existing features and keep everything available to everyone.
Every contribution, large or small, is sincerely appreciated. Thank you for supporting independent development.