In this guide
High-resolution audio generally describes audio delivered at resolution beyond CD's 44.1 kHz, 16-bit PCM; definitions vary. A higher sample rate or bit depth does not prove a better master or restore detail lost earlier in the source chain.
High-resolution audio usually refers to digital audio delivered at a higher sample rate, bit depth or both than CD audio's 44.1 kHz, 16-bit PCM. Common examples include 24-bit/96 kHz PCM, but the precise threshold and labeling depend on the organization or service using the term.
Those numbers describe the delivered format, not the entire history of the recording. A high-resolution file can contain an excellent master, an upsampled lower-resolution source or material previously encoded with a lossy codec. The Library of Congress audio guidance, for example, describes 96 kHz/24-bit PCM as high resolution in its preservation preferences and prefers native over upsampled resolution.
What do sample rate and bit depth mean?
| Property | What it describes | Example |
|---|---|---|
| Sample rate | The number of sample frames per second. | 96 kHz means 96,000 frames per second per channel. |
| Bit depth | For integer PCM, the number of bits used to represent each channel sample. | 24-bit PCM has more possible integer sample values than 16-bit PCM. |
| Channels | The number of audio channels stored. | A stereo file has two channels; mono has one. |
Sample rate and bit depth are different from an MP3's encoded bitrate. Higher PCM bit depth can provide more dynamic-range headroom, and a higher sample rate changes the frequency range the format can represent. Neither number alone establishes that a particular recording sounds better. See sample rate, bit depth and bitrate.
How much larger are high-resolution files?
For uncompressed integer PCM, the audio payload is approximately sample rate × bit depth ÷ 8 × channels × duration. The table shows one minute of stereo PCM in decimal megabytes, before headers and metadata:
| Stereo PCM setting | Approximate payload per minute |
|---|---|
| 44.1 kHz / 16-bit | 10.58 MB |
| 48 kHz / 24-bit | 17.28 MB |
| 96 kHz / 24-bit | 34.56 MB |
Actual WAV files include headers and may contain metadata. Lossless compression such as FLAC can reduce the size while preserving the encoded sample values, but savings depend on the signal. The audio file size calculator can estimate a different duration or channel count; check the actual exported bytes against any upload limit.
Which formats can contain high-resolution audio?
WAV and AIFF can store PCM at different rates and bit depths. FLAC and ALAC are lossless codecs that can preserve supported PCM samples in compressed form. A file extension alone does not prove a particular resolution or a lossless source history; inspect the actual file and check the provider's information. See audio file formats and FLAC vs. WAV.
DSD is a different encoding approach and is not directly described by the same PCM bit-depth and sample-rate comparison. Avoid treating all large audio files or all lossless files as automatically high resolution.
How to check a WAV file
- Keep the original file and identify whether it is actually a WAV rather than relying solely on its name.
- Open it in a suitable file inspector. The Saturalabs WAV file inspector reads supported WAV header fields locally and reports sample rate, encoding, channel layout, sample container and valid-bit information where available.
- Compare the displayed format with the delivery requirement. Container bits and valid bits can differ; use the actual field descriptions rather than assuming they mean the same thing.
- Check the source and playback chain separately. A header cannot tell you whether the recording was upsampled, previously lossy or made from a different master.
For a supported mono or stereo 16- or 24-bit integer PCM WAV, the separate WAV-to-FLAC converter can preserve sample values without resampling within its five-minute and 50 MiB limits. It verifies an audio checksum, not every metadata field; keep the WAV when its original metadata matters.
Will high-resolution audio always sound better?
Not necessarily. Different releases may use different masters, levels or processing, making a comparison about more than format resolution. Playback hardware, room, headphones, listening level and the listener also matter. Upsampling an MP3 or CD-quality file to a larger PCM format does not recreate detail missing from the source.
For a useful comparison, use authorized versions of the same master where possible, match listening levels, and compare the same passages without knowing which is playing when practical. Check that the playback path does not resample or change one version unexpectedly. For editing, use the resolution requested by the project and preserve the best available source; larger files consume more storage and bandwidth.
Common questions
Is lossless the same as high resolution?
No. Lossless describes whether a codec preserves the encoded sample values; high resolution describes a delivery-resolution category. CD-quality audio can be lossless without being high resolution.
Does converting MP3 to 24-bit WAV improve it?
No. It creates a new PCM representation that may be useful for editing, but cannot restore audio detail discarded by MP3 encoding.
Does every device play high-resolution audio at its original rate?
No. Apps, operating systems, digital-to-analog converters and wireless connections may resample or re-encode audio. Check the specific playback chain and its settings.