Generate Sine Sweep WAV Files for Speaker & Room Measurement

A focused tool for generating sine sweep WAV files used in room and loudspeaker measurement workflows — REW, ARTA, Room EQ Wizard, Smaart, ReaFIR. Pick the start and end frequencies (1 Hz to Nyquist), sweep type (logarithmic for equal-energy-per-octave or linear for FFT-friendly equal-energy-per-Hz), duration, sample rate, bit depth and channel routing (stereo, mono, L-only, R-only). Optional raised-cosine fade in/out prevents click-pop from contaminating the impulse response.

How to Use

Set the start and end frequency — 20 Hz to 20 kHz covers human hearing; narrower ranges are useful for subwoofer or HF tweeter measurement.

Choose the sweep type. Log (exponential) is the standard for room-EQ. Linear is preferred when you do straight FFT-based amplitude analysis.

Pick sample rate and bit depth to match your measurement interface (48 kHz / 24-bit is the safe default).

Route the sweep to the correct channel — L-only for testing the left speaker, mono for both, etc.

Tap Preview to verify, then Generate. Load the WAV into REW / ARTA / Room EQ Wizard / your DAW and start the measurement.

Exponential or linear sweeps for REW, ARTA, Room EQ Wizard and impulse-response work

Start frequency (Hz)

End frequency (Hz)

Duration (sec)

Sweep type

Logarithmic (exponential) Equal energy per octave — REW / ARTA standard for room-EQ. Linear Equal energy per Hz — straight FFT amplitude analysis.

Sample rate

Bit depth

Fade in/out

Channel routing

Also save inverse filter for IR deconvolution A second WAV (sweep-invfilter-…) that convolved with the recording yields the impulse response. For ARTA / DRC / direct-FFT workflows; REW does its own inverse internally.

Volume warning: Start at low gain — full-amplitude sweeps can damage tweeters and subwoofers. Set interface peaks to about −12 dBFS at the measurement mic before increasing level.

File size: — · — samples · —

Features

Log and linear sweeps — REW-compatible exponential and FFT-friendly linear modes Frequency range 1 Hz to Nyquist (up to 48 kHz at 96 kHz sample rate) 44.1, 48 or 96 kHz sample rates; 16- or 24-bit PCM Channel routing: stereo, mono, L-only, R-only — measure a single speaker via a 2-channel interface Built-in 6-second preview so you hear the sweep before saving Raised-cosine fade in/out (0–500 ms) to keep boundary clicks out of the IR

Frequently Asked Questions

Log or linear — which sweep should I use?

For room and loudspeaker measurement use a logarithmic (exponential) sweep — it spends equal energy per octave, so low frequencies (where room modes dominate) get the same SNR as the highs, and the inverse filter cleanly deconvolves to an impulse response. Use a linear sweep when you plan to do straight FFT-based amplitude analysis without inverse filtering.

Why is the maximum end frequency limited to Nyquist?

Frequencies above Nyquist (sample rate / 2) fold back as aliasing — the tool refuses configurations that would produce them so you do not generate a sweep that decodes incorrectly. At 48 kHz Nyquist is 24 kHz; at 96 kHz it is 48 kHz.

Why does L-only also fill the right channel with silence?

Many measurement chains expect a stereo WAV even when measuring a single speaker — they route channel 1 to the device-under-test and ignore channel 2. By writing explicit silence to the unused channel, the file is unambiguous on hardware that mis-detects mono routing or auto-downmixes.

How loud should I play it?

Start quietly and step up — 0.5 amplitude (the default) is roughly -6 dBFS. Set your interface gain so peaks read around -12 dBFS at the measurement microphone with the sweep playing at the level you actually want to measure. Sweeps at full system volume can damage tweeters or subwoofers; the volume warning above is not decoration.

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Published 21 May 2026