Media

Change the sample rate of an audio file (e.g., 44.1kHz to 22.05kHz)

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Package a single impulse, full-period MLS or logarithmic sweep with parameters and measurement instructions.

Media

Detect DTMF touch-tone digits in any recording and recover the keypad sequence with timestamps. Goertzel filter bank per ITU-T Q.23/Q.24 — measures both tone frequencies, twist and duration for every keypress.

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Generate ITU-T Q.23/Q.24-compliant DTMF touch-tone sequences (0-9, *, #, A-D) as audio files — IVR prompts, PBX testing, film props, decoder development. Tone/pause timing, twist and level configurable, Q.24 compliance checked.

Health

Estimate your listening-exposure risk against NIOSH (85 dBA/8h, 3 dB exchange), OSHA (90 dBA/8h, 5 dB) and WHO-ITU H.870 weekly allowance — enter level, duration and sessions, or upload the audio you listen to for measured duration and loudness.

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Apply bit-crushing distortion to audio with presets, drive, tone, output gain, and dry/wet mixing.

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Diagnose electrical hum contamination in recordings: 50/60 Hz mains family with harmonic profile, ground-loop vs PSU-buzz classification, and a recommended repair chain.

Media

Detect and remove DC offset from audio

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Detect brief signal dropouts and silent gaps in audio

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Speech-focused cleanup for noisy evidence and interview recordings: documented FFmpeg filter chains with presets for evidence clarity, broadcast, telephone band and transcription prep.

Media

Compare an original master with its lossy encode and flag pre-echo, transient smearing, bandwidth loss and stereo damage, with per-event timestamps.

Media

Hear and measure what streaming does to your master: encode to MP3, AAC or Opus at real streaming bitrates, decode back, and compare loudness shift, true-peak overshoot and headroom against the original — the Apple Digital Masters round-trip audition as a report plus downloadable preview files.