Hear your mix everywhere.

Fine-tune gain to 0.01 dB, compare destination references, and audition approximate headphone translations.

Load recording

Select a WAV, MP3, or another browser-supported recording.

Listen & export

Load a recording to begin.

Live preview includes a basic gain/limiting approximation and monitoring-only headphone EQ. Export excludes headphone EQ. Platform, level, peak ceiling, and headphone changes update the running preview without restarting playback. This does not emulate streaming encoding or real device nonlinearities.

Analysis, reference & quality checks

Reference track

Optional: compare integrated loudness, RMS and true peak.

Actual browser codec round-trip

Codec generation records in real time; playback keeps running while encoding.

Monitor encoded/decoded codec audio (when ready)

Processed (uncheck for original A/B) Loudness-match A/B (approx. gain matching)

FFT spectrum is measured from the running monitor audio. The reference comparison is an analysis, not a direct time-synced two-track player.

Quality alerts

Load audio to analyze.

Platforms & precise levels

Destination platform

Reference loudness approx.—

Automatic reference gain—

Measured input RMS dBFS · not LUFS—

Integrated loudness

—

LUFS · BS.1770-style gated

True peak · estimated

—

dBTP · 4× interpolated

Loudness range

—

LU · approximate

Output gain adjustment

Load a recording to estimate reference gain. Double-click the slider to reset to 0 dB.

Advanced platform & precise level settings

Final output gain—

Extra gain trim

0.01 dB precision · double-click slider to reset to 0 · arrow keys for fine adjustments · snaps near zero

Peak ceiling

dBFS

These are editable preview references, not guaranteed platform specifications. Loudness and true-peak analysis are approximate and not compliance-certified; actual upload processing varies by platform.

A loudness reference is not a compression threshold. Matching it does not guarantee a platform will avoid compression or encoding changes.

Headphone translation

Search headphones you're wearingSearch headphones to simulate

Simulate speaker / device categoryLoad measured headphone frequency-response CSV (frequency Hz, level dB)

Built-in named headphones use generic EQ classes. Upload measured CSV for an actual response-derived target (still affected by fit and calibration).

Simulation amount

Headphone options are a discovery catalog with generic, illustrative EQ classes, not manufacturer-specific measured profiles. Shared classes can produce identical previews. Bluetooth modes, fit, seal, ANC, spatial audio, distortion, and dynamics are not modeled.