Can people hear the difference between 192 and 320 kbps?

Most people cannot reliably tell them apart in normal listening. With good headphones, quiet surroundings and familiar music, some listeners can. If storage is not a concern, 320 kbps removes the question.

Is 128 kbps good enough?

For speech, yes. For music it is acceptable on phone speakers or in a car, but cymbals and complex passages can sound slightly smeared on good equipment; 192 kbps is a better default for music.

Does converting to 320 kbps improve a low-quality MP3?

No. It makes the file larger without restoring anything the original encoding discarded. Convert from the highest-quality source you have.

Is MP3 still worth using?

Yes, for compatibility: essentially every device, car stereo and app plays MP3. Formats such as AAC are slightly more efficient at the same bitrate, but none is as universally supported.

Which MP3 bitrate should you use? 128, 192, 256 or 320 kbps

Short answer: Use 128 kbps for speech, podcasts and lectures; 192 kbps for most music, which most people cannot tell from the original; and 320 kbps when converting from a lossless source such as WAV or FLAC and file size does not matter. Converting a low-bitrate file to a higher bitrate adds size but no quality.

Updated 30 September 2026

What bitrate means

Bitrate is how much data is spent on each second of sound, measured in kilobits per second (kbps). MP3 is a lossy format: it discards the parts of a sound people are least able to hear, and the bitrate decides how much it is allowed to keep. More kilobits mean more detail and a bigger file.

Because the bitrate is fixed per second, file size is easy to predict: it depends only on the bitrate and the length of the recording.

The common bitrates compared

Bitrate	Size per minute	A 4-minute song	Best for
128 kbps	About 0.96 MB	About 3.8 MB	Speech, podcasts, lectures, audiobooks
192 kbps	About 1.44 MB	About 5.8 MB	Most music — the sensible default
256 kbps	About 1.92 MB	About 7.7 MB	Music on good headphones
320 kbps	About 2.4 MB	About 9.6 MB	Converting from lossless; maximum MP3 quality

For comparison, uncompressed CD-quality WAV runs to roughly 10 MB a minute, so even 320 kbps MP3 is about a quarter of the size.

Which one to choose

Speech of any kind: 128 kbps. The human voice occupies a narrow range, and higher bitrates add size without adding clarity.
Music for everyday listening: 192 kbps. In normal listening conditions most people cannot reliably tell it from the original.
Music on good headphones or speakers: 256 or 320 kbps, if you would rather not think about it.
From a lossless master (WAV or FLAC): 320 kbps, so the one compression step discards as little as possible.

WAV to MP3 and FLAC to MP3 offer all four, and can trim a recording to just the section you need. To pull the soundtrack out of a video, MP4 to MP3 works the same way.

Higher bitrate cannot restore lost quality

Converting a 128 kbps MP3 into a 320 kbps MP3 produces a file two and a half times larger that sounds exactly the same or very slightly worse — what the first encoding discarded is gone, and the second encoding adds its own small loss. The same applies to audio extracted from a video, whose soundtrack is already compressed.

Always convert from the best source you have, once. Keep WAV or FLAC files as your masters and make MP3s from them, rather than converting MP3 to MP3.

Every re-encode of a lossy file loses a little more. If you will edit a recording again, keep a lossless copy as the working file and export MP3 only for sharing.

Other things MP3 changes

MP3 tops out at a 48 kHz sample rate, so hi-res 96 kHz or 192 kHz recordings are resampled, and anything with more than two channels — a 5.1 film soundtrack, for instance — is mixed down to stereo. On ConvertNicely, conversions also remove metadata, including track titles and cover art, so add tags again in your music app if you need them.

Frequently asked questions

Read the format guides