Audio Chirp Sweep Generator

Ascending, descending and equal-frequency tones are supported; phase integrates instantaneous frequency. Lower amplifier and headphone volume before playback; no automatic playback. Levels are peak targets from −60 to −3 dBFS, not calibrated dB SPL. PCM24 WAV uses an exact frame count rounded from duration × sample rate. Periodic frequencies must stay below 0.45 × sample rate. Square, triangle and sawtooth waves use at most 16 harmonics below that limit with conservative peak normalization. Fades may occupy at most half the active signal. Noise and silence ignore frequency, phase and sweep controls. Excitation is a test input, not a measured room impulse response; a separate recording and deconvolution stage is required.