# Audio Spectral Filter Filter audio based on its spectral content > Canonical page: https://elysiatools.com/en/tools/audio-spectral-filter - **Category:** Media - **Keywords:** audio, spectral, filter, frequency, FFT, equalizer, enhancement, processing, analysis ## Overview Applies frequency-domain filtering to shape audio spectrum with surgical precision. Uses FFT-based processing to boost, cut, or notch specific frequency ranges while preserving temporal characteristics. Ideal for spectral enhancement, noise reduction, and creative frequency manipulation. ## Inputs - **Audio File** (file): Select an audio file - **Filter Type** (select): Type of spectral filtering to apply. Each type has different frequency shaping characteristics. - **Low Frequency (20-1000 Hz)** (number): Center frequency for low frequency band adjustments. - **Low Gain (-20 to 20 dB)** (range): Gain adjustment for low frequency band. Positive = boost, Negative = cut. - **Mid Frequency (200-5000 Hz)** (number): Center frequency for mid frequency band adjustments. - **Mid Gain (-20 to 20 dB)** (range): Gain adjustment for mid frequency band. Positive = boost, Negative = cut. - **High Frequency (1000-20000 Hz)** (number): Center frequency for high frequency band adjustments. - **High Gain (-20 to 20 dB)** (range): Gain adjustment for high frequency band. Positive = boost, Negative = cut. - **Filter Sharpness (0-1.0)** (range): How steep the filter transitions are. Higher values = more precise frequency targeting. - **Resonance Amount (0-1.0)** (range): Adds feedback character to the filter. Higher values = more pronounced filter response. - **Wet/Dry Mix (0-1.0)** (range): Balance between dry (original) and wet (filtered) signal. - **Output Format** (select) ## When to use - When you need to enhance or reduce specific frequency bands in an audio file for clarity or effect. - For removing unwanted noise, hums, or resonances by targeting their exact frequencies. - To creatively manipulate audio by shaping its spectral content for music production or sound design. ## How it works - Upload an audio file in supported formats like MP3, WAV, or FLAC. - Select a filter type such as spectral enhancement, notch, bandpass, or parametric EQ. - Adjust frequency bands (low, mid, high) with gain controls and set filter sharpness and resonance. - The tool applies FFT-based processing to modify the spectrum and outputs the filtered audio file. ## Use cases - Enhancing vocal clarity in podcast recordings by boosting mid frequencies and cutting low-end rumble. - Reducing background noise in field recordings using notch or bandpass filters to isolate and remove unwanted sounds. - Creating creative audio effects for music by manipulating high and low frequencies with parametric EQ or shelf filters. ## Frequently asked questions ### What audio formats can I upload? You can upload common audio formats including MP3, AAC, M4A, OGG, Opus, FLAC, and WAV. ### How does the notch filter work? The notch filter targets and attenuates a narrow frequency range, useful for removing specific noises like hums or whistles. ### Can I adjust how aggressive the filter is? Yes, use the sharpness slider to control filter transition steepness; higher values mean more precise frequency targeting. ### What is the wet/dry mix for? It balances the original (dry) audio with the processed (wet) signal, allowing you to blend effects subtly. ### Is real-time preview available? No, the tool processes the entire audio file and provides a downloadable output after filtering. ## Related tools - [Audio Dynamic Range Report](https://elysiatools.com/en/tools/audio-dynamic-range-report): Analyze and report on the dynamic range of an audio file - [Audio Loudness Report (LUFS)](https://elysiatools.com/en/tools/audio-loudness-report): Generate a report on the loudness (LUFS) and dynamic range - [Audio Chapter Split](https://elysiatools.com/en/tools/audio-chapter-split): Split an audio file based on its chapters/metadata - [Audio Chord Progression Detector](https://elysiatools.com/en/tools/audio-chord-progression-detector): Estimate an audio file's chord sequence locally and download CSV, JSON, SVG, and method notes in one ZIP. - [Audio Mix Translation Checker](https://elysiatools.com/en/tools/audio-mix-translation-checker): Simulate your mix on phone, laptop, earbud, car, club, mono and noisy-street playback, export every render in a ZIP, and report what survives each system. - [Audio RMS Normalize](https://elysiatools.com/en/tools/audio-rms-normalize): Normalize audio based on its RMS level - [Audio Voice Cleanup Assistant](https://elysiatools.com/en/tools/audio-voice-cleanup-assistant): Analyze voice issues and suggest a processing chain, with a before/after preview of the cleaned audio. - [Audio BPM Detector](https://elysiatools.com/en/tools/audio-bpm-detector): Detect the beats per minute (BPM) of a music track ## Samples - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows ## Related content - [Audio Restoration, Noise Repair, and Cleanup Tools](https://elysiatools.com/en/hubs/audio-restoration-repair-workflows): Diagnose and repair clicks, hum, clipping, crackle, room sound, hiss, and harshness without promising lossless restoration. - [Audio Measurement and Inspection](https://elysiatools.com/en/hubs/audio-analyze): Measure loudness, peaks, dynamics, musical descriptors, spectrum, and metadata before mastering, publishing, or archiving audio.