WAV to MIDI Converter

Is WAV lossless?

WAV is a container, not a codec. In the overwhelming majority of cases it carries uncompressed PCM — the raw amplitude readings taken at each sampling instant — so nothing is discarded between the recorder and the file. That is why a PCM WAV is described as lossless: the waveform you analyze is the waveform that was captured, with no perceptual encoding artifacts, no masked high frequencies and no compression ringing around sharp attacks. A WAV can technically wrap a compressed stream, so the extension alone is not a guarantee, but a plain PCM WAV is the cleanest input this converter can receive.

Why sample rate and bit depth matter here

Sample rate sets how many readings of the waveform are stored per second, which in turn sets the highest frequency the file can represent. Bit depth sets how finely each reading's amplitude is quantized, which sets the noise floor. For melody transcription the important region is the low band where a fundamental sits, and a standard-rate PCM file already resolves that band far more densely than a pitch tracker needs. Raising the sample rate mainly hands the autocorrelation more samples per cycle; it does not make a noisy or clipped recording more tonal. Low bit depth, hard limiting or clipping add broadband noise and extra harmonics that can fool a periodicity estimate into locking onto an octave or a partial instead of the true fundamental.

What records well

Feed it one exposed melodic line. A hummed tune, a whistle, a solo violin or flute, a single synth lead, or a voice recorded close and dry all give the tracker a clear repeating waveform to follow. Short, clean attacks and a little silence between phrases make note boundaries easy to place. Chords, drums, a full mix, heavy room reverb or loud accompaniment put several pitches into the same analysis window; the tracker follows the dominant one and the rest is lost, because it is monophonic by design. If your source is a finished song, isolate or re-record the melody first rather than hoping the converter will separate it for you.

What the MIDI file is good for

The output is a Standard MIDI File containing note-on and note-off events with pitch, timing and velocity — a score, not a sound. There is no timbre, no lyrics and no audio in it, so you play it back through an instrument or synth inside a DAW or notation editor. That is also its advantage: you can change the instrument, transpose the whole line, quantize the timing, fix a wrong note or build an arrangement around the phrase without re-recording anything. Treat the result as a fast first draft of the melody, not a finished transcription; correcting a few notes by ear is normal.

Working from a compressed file instead? The main MP3 to MIDI converter accepts MP3, OGG, M4A, AAC and FLAC alongside WAV, using the same conversion engine.