StudioWavePro — Online Audio Editor with 48+ Studio Tools

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StudioWavePro’s Treble Boost adds clarity, crispness and "air" using a high-shelf filter — the same curve behind every treble knob ever made. Boost (0 to +15 dB) sets the amount of lift; Crossover (2–12 kHz) sets the frequency above which it applies. The default 4 kHz shelf brightens the zone where speech consonants and instrument definition live, which is why dull recordings snap into focus with just a few dB here.

Adjust everything live: press play, drag the sliders, and the filter follows in real time. Move the crossover up toward 8–10 kHz to add only sparkle and air without touching the potentially harsh 3–5 kHz region — the trick for brightening a track that’s already a little edgy.

When to use

Rescue a muffled phone or voice-memo recording.
Restore the brightness an old tape or vinyl transfer has lost.
Add definition to speech so consonants cut through (great before publishing a podcast).
Give acoustic instruments back their string and pick detail.
Compensate for a recording made off-axis or behind an obstacle.

How to use

Click "Open Treble Boost" below to launch the editor.
Drop in any audio file — MP3, WAV, OGG, M4A and FLAC are all supported.
Press "Play preview", then raise the Boost slider (0 to +15 dB) until the track opens up.
Adjust the Crossover (2,000–12,000 Hz): lower values brighten more of the spectrum, higher values add only top-end sparkle.
Click "Apply Treble Boost", then download as WAV or MP3.

Tips

Start at +3 to +6 dB; the +15 dB extreme is for genuinely dull material. Too much treble reads as harsh long before it reads as "clear."
Treble boosting amplifies hiss along with everything else up there. If the recording is noisy, boost less — or pair a modest boost with a lower crossover.
Sibilance (spitty S sounds) lives around 5–8 kHz. If esses turn sharp, move the crossover above 8 kHz so the boost adds air over the sibilance instead of into it.
For the opposite problem — a harsh or bright track — use the Low Pass filter or cut the High band in the 3-band EQ.
Bass Boost is this tool’s mirror image; used together gently (+3 dB each end) they produce the classic "smile" curve.

Frequently asked questions

How do I make a muffled recording sound clearer?: Open Treble Boost, press Play preview, and raise the boost until the detail comes back — usually +4 to +8 dB at the default 4 kHz crossover. Apply and download. If it gets harsh before it gets clear, move the crossover higher and try again.
What does the crossover frequency do?: It sets where the shelf starts. At 2–4 kHz the boost affects presence and intelligibility; at 6–8 kHz it targets brightness; at 10–12 kHz it adds only the airy top octave. Everything above the chosen frequency is lifted by the boost amount.
Why does my audio sound harsh or hissy after boosting treble?: Two causes: the boost is amplifying noise that was always there (hiss lives in the highs), or the crossover is low enough to be lifting the natural harshness region at 3–5 kHz. Lower the boost a few dB or raise the crossover — and for noisy sources, fix the noise before brightening.
What is a good treble boost for speech and podcasts?: +3 to +5 dB with the crossover at 4–6 kHz adds intelligibility without sharpening esses. If sibilance becomes noticeable, push the crossover to 8 kHz and keep the same boost.
Treble Boost vs the equalizers — when to use which?: Treble Boost is a single high-shelf with a movable corner: the fastest path when the only problem is "not bright enough." The 3-band EQ adds bass and mid control; the 10-band EQ gives surgical access to specific frequencies. They all preview live, so the cost of trying is zero.
Will boosting treble damage the audio quality?: The filter itself is transparent — full floating-point precision, the same math as desktop software. Large boosts can clip the output though; if the preview sounds strained at high settings, back off or run Normalize after applying. Export as WAV for lossless results.

StudioWavePro is a complete audio editor with 48+ studio-grade tools in one workspace. Trim, master, EQ, time-stretch, denoise, remove vocals, detect BPM and musical key, generate metronomes, and more. Editing tools

Audio Trimmer — crop a track to a selected region

Mute Section — silence a selected region

Reverse Audio — play the track backwards

Fade In/Out — ramp volume at start or end

Silence Trimmer — strip leading and trailing silence

Silence Gap Inserter — insert silence at a chosen position

Audio Looper — repeat a section N times

Audio Splitter — cut a track into multiple parts

Audio Merger — join multiple files end-to-end

Silence Splitter — auto-split at silent gaps

Crossfade Joiner — join clips with overlapping fades

Time and pitch

Speed Changer — speed up or slow down (with optional pitch preservation)

Pitch Shift — change pitch without changing tempo

Tempo Detector — estimate the BPM of a music track

Key Detector — estimate the musical key

Metronome Generator — create a click track at any BPM

Effects

Volume — make a track louder or quieter

Bass Boost — lift the low end

Treble Boost — lift the high end

Low Pass Filter — cut off high frequencies

High Pass Filter — cut off low frequencies (remove rumble)

Equalizer (3-band) — low / mid / high tonal shaping

Equalizer (10-band) — fine-grained tonal control

Echo — add repeating echoes / delay

Distortion — overdrive, fuzz, and lo-fi grit

Stereo Balance — shift the L/R center of a stereo mix

Stereo Widener — make stereo narrower or wider

Vocal Remover — karaoke (center-channel removal)

Hum Remover — strip 50/60 Hz mains hum

Mastering and analysis

Normalize — maximize volume without clipping

Compressor — even out loud and quiet parts

Loudness Meter — measure peak, RMS, and LUFS

Mono Converter — collapse stereo to mono

Channel Extractor — pull L, R, Mid, or Side

Sample Rate Converter — resample to 44.1, 48, or 96 kHz

Polarity Inverter — flip waveform for phase alignment

DC Offset Remover — center waveform around zero

Audio Visualizer — render an animated video from audio

StudioWavePro supports MP3, WAV, OGG, M4A, and FLAC files. Exports include WAV and MP3. This app requires JavaScript to run. Please enable JavaScript in your browser.