Sample Rate Finder

Why Checking Your Audio File Specifications Matters

Before you distribute, master, or mix any audio file, knowing its exact technical specifications is essential. The sample rate, bit depth, channel count, bitrate, and duration of an audio file determine its quality, compatibility, and file size. Our Sample Rate Finder analyzes audio files instantly in your browser, detecting all of these properties without uploading your files to any server. This makes it a fast, private, and reliable way to verify audio specifications at any stage of your workflow.

Common Scenarios Where File Analysis Is Critical

There are many situations in music production and distribution where verifying audio specifications can save you time, money, and frustration:

• Pre-mastering quality check — Before sending tracks to a mastering engineer, verify that your mix files are at the expected sample rate and bit depth. Mastering engineers typically require 44.1 kHz or 48 kHz at 24-bit. Sending files at the wrong specs can result in rejected submissions or unnecessary sample rate conversion.
• Distribution platform compliance — Digital distributors like DistroKid, TuneCore, and CD Baby have specific file requirements. Spotify recommends 44.1 kHz / 16-bit WAV or FLAC. Apple Music's Apple Digital Masters program accepts up to 96 kHz / 24-bit. Verifying your files meet these requirements before uploading prevents rejection and delays.
• DAW session compatibility — When importing audio files into a DAW session, mismatched sample rates can cause pitch shifts, timing errors, or automatic resampling that degrades quality. Checking the sample rate of imported files ensures they match your session settings.
• Collaboration file exchange — When receiving stems, samples, or recordings from collaborators, checking their specifications ensures compatibility with your project before you start working.
• Archival and backup verification — When archiving recordings for long-term storage, verifying that files are at the intended quality settings ensures nothing was accidentally downsampled or truncated during the backup process.

Understanding What the Numbers Mean

Sample rate determines the frequency range that can be reproduced. At 44.1 kHz (the CD standard), the maximum reproducible frequency is 22.05 kHz, which exceeds the typical upper limit of human hearing. Higher sample rates like 96 kHz or 192 kHz capture frequencies well beyond audibility, which can be beneficial during processing (especially for plugins that perform frequency-domain operations) but are generally unnecessary for final distribution.

Bit depth determines the dynamic range. 16-bit audio provides 96 dB of dynamic range, which is sufficient for distribution. 24-bit provides 144 dB, giving a massive safety margin during recording and mixing. If your file shows 16-bit, it was likely already bounced for distribution. If it shows 24-bit, it retains the full dynamic range from the recording session.

Bitrate for uncompressed formats (WAV, AIFF) is determined by the formula: sample rate × bit depth × channels. A 44.1 kHz / 16-bit stereo WAV has a bitrate of 1,411 kbps. For compressed formats (MP3, AAC, OGG), the bitrate indicates the compression level. A 320 kbps MP3 is considered high quality, while 128 kbps is noticeably lower quality. Our tool detects the actual bitrate so you can verify whether a compressed file meets your quality standards.

Detecting Fake High-Resolution Audio

A common issue in the audio world is “upsampled” files, where a lower-quality recording has been converted to a higher sample rate or bit depth without actually adding any new information. A 44.1 kHz recording upsampled to 96 kHz is still a 44.1 kHz recording in terms of frequency content; it just takes up more disk space. While our tool reports the file's stated specifications, comparing the bitrate and file size against what you would expect for genuine high-resolution audio can help identify files that may have been upsampled.

Mono vs. Stereo: When It Matters

Our tool detects the channel count of your audio files. Stereo (2 channels) is standard for most music production and distribution. Mono (1 channel) is common for individual recording tracks, voiceovers, podcasts, and some vintage recordings. Understanding the channel configuration helps you identify potential issues. For example, if a final mix file shows as mono, it may indicate an export error. Conversely, if individual stems are stereo when they should be mono (like a close-miked vocal), they may contain redundant data that doubles the file size unnecessarily.

Browser-Based Analysis: Fast and Private

Like all our audio tools, the Sample Rate Finder processes files entirely in your browser using the Web Audio API. Your files are never uploaded to any server, ensuring complete privacy for unreleased music, confidential recordings, and client work. The analysis happens in seconds, making it practical to check multiple files in quick succession. This is especially useful during the final stages of a project when you need to verify specifications for an entire album or EP before submission.

For a deeper understanding of how sample rate and bit depth affect quality and file size, use our Sample Rate Calculator to model different settings. To detect the musical key and tempo of your files, try the Key & BPM Finder. And for understanding how note frequencies relate to your audio content, use the Frequency Calculator. Together, these tools provide a comprehensive audio analysis and reference toolkit for any music professional.