How to Make Audio Sound Low Quality Online

Low-quality audio can mean several different things: a narrow telephone-like frequency range, an 8-bit digital texture, a clipped cheap microphone, mono playback, or a recording with reduced sample detail. The best result starts by choosing which failure you want to imitate.

The Low Quality Audio Maker processes the selected recording locally in your browser and exports an uncompressed PCM WAV. It exposes sample rate, 8-bit or 16-bit depth, mono or stereo channels, distortion, and low-pass filtering.

Start with Cursed Mic

The Cursed Mic preset is the strongest ready-made option. It requests:

• an 11,025 Hz processing sample rate;
• 8-bit PCM output;
• mono channels;
• strong distortion; and
• a 3,400 Hz low-pass cutoff.

Together, these settings imitate an overloaded, bandwidth-limited voice-chat microphone. They do not reproduce a particular compressed codec, because the v1 output remains PCM WAV.

Step-by-step workflow

1. Open the Low Quality Audio Maker.
2. Choose a short source file and preserve the original.
3. Select Cursed Mic.
4. Process the default preset once.
5. Listen to Original and Worse after processing completes.
6. Check the actual sample rate, channel count, and bit depth reported for the WAV.
7. Reduce distortion if speech becomes unintelligible.
8. Raise the low-pass cutoff if consonants disappear.
9. Download and play the completed WAV outside the editor.

What each control changes

Sample rate limits the highest frequencies available during processing. Lower rates remove brightness and fine transients.

Bit depth controls the number of amplitude levels stored in the PCM output. Eight-bit audio has more audible quantization texture than 16-bit audio.

Mono combines channels into one. It removes stereo width but does not automatically make the sound distorted.

Distortion reshapes the waveform and produces harmonics. High values can make voices harsh or clipped.

Low-pass filtering removes frequencies above the cutoff. A low cutoff creates the narrow, muffled character associated with small speakers, telephony, or restricted voice communication.

To isolate the two digital controls, compare 8-Bit Audio vs Low Sample Rate. For the interaction between mono, filtering, and waveshaping, read Mono, Distortion and Low-Pass Filters.

Make speech bad, not meaningless

For dialogue, preserve enough midrange for words to remain understandable. Start with the preset, then reduce distortion or raise the low-pass cutoff. If the result is for a joke, test it at the same playback volume and device the audience will use.

Why the file may not become smaller

The output is uncompressed PCM WAV. A deliberately worse sound can still produce a larger file than an MP3, AAC, or Opus source. The tool changes the sound and PCM properties; it does not claim to be a compressed-audio size optimizer.

The storage reason is explained in Why Low-Quality WAV Files Can Be Larger.

For the most aggressive voice style, read How to Create a Cursed Mic Effect. Open the Low Quality Audio Maker to process the recording without uploading it.

Sources and further reading

• Web Audio API specification — browser audio buffers, filters, waveshaping, and offline rendering.
• MDN OfflineAudioContext — the browser-local rendering context behind processed audio output.
• WAVE format description from the Library of Congress — PCM WAV structure and storage characteristics.