Hz Tone Generator

Generates single-tone audio signals with precise frequency, duration, and waveform type for testing audio gear, calibration workflows, and educational demonstrations. The tool targets audio engineers, technicians, educators, and hobbyists who need repeatable, traceable test tones for validation and measurements.
\nWaveform synthesis uses standard PCM techniques. For sine: A * sin(2*pi*f*t); square: sign(sin(2*pi*f*t)); triangle and sawtooth: computed using simple, deterministic equations to ensure repeatable results. Outputs are 16-bit PCM at the chosen sample_rate.
\nInputs include frequency (Hz), duration (s), waveform (sine, square, triangle, sawtooth), amplitude (0-1), and sample_rate (44100 or 48000). Optional features include fade-in/out envelopes and stereo panning; outputs include a WAV file, and an optional base64 string or raw PCM payload.
\nError handling ensures frequencies are clamped to 20–20000 Hz, duration must be positive, and unsupported sample rates default to 44100. Very long durations may produce large files and should be used with awareness of storage and bandwidth.
\nIndustry standards: SI units (Hz, seconds) and common audio sampling rates (44.1k/48k) ensure compatibility with measurement equipment and teaching aids. Not intended for real-time streaming or multi-effect production; outputs are single-tone references suitable for calibration, QA, and education.
\nAssumptions: users require deterministic tones for repeatable measurements; exclusions include complex DSP chains, filters, or modulation in this primitive generator.