# Audio Diff Compare two audio files and show their differences > Canonical page: https://elysiatools.com/en/tools/audio-diff - **Category:** Media - **Keywords:** audio, diff, compare, difference, similarity, verify ## Overview Compares format, duration, size, bitrate, sample rate, and generates a similarity report. Useful for verifying audio conversions or detecting changes. ## Inputs - **First Audio File** (file): Select the first audio file - **Second Audio File** (file): Select the second audio file - **Include SHA-256 Hash** (checkbox) ## When to use - When verifying that an audio format conversion preserved the original duration and sample rate. - When checking if two audio files are identical at a binary level using SHA-256 hash verification. - When auditing audio assets to detect differences in bitrate, file size, or metadata between original and compressed versions. ## How it works - Upload the first audio file as the primary reference. - Upload the second audio file that you want to compare against the first. - Optionally check the 'Include SHA-256 Hash' option to perform a cryptographic integrity check. - Click compare to generate a structured JSON report detailing differences in format, duration, size, bitrate, and sample rate. ## Use cases - Verifying audio transcoder output to ensure sample rates and durations match the source files. - Detecting duplicate audio files in a media library by comparing file sizes, bitrates, and SHA-256 hashes. - Quality assurance testing for game audio assets to confirm compression settings were applied correctly. ## Frequently asked questions ### What audio formats does this tool support? The tool supports standard audio formats including MP3, WAV, AAC, FLAC, OGG, and M4A. ### How does the tool calculate similarity? It compares technical metadata such as duration, sample rate, bitrate, and file size, and can perform a binary hash comparison if selected. ### What is the maximum file size I can upload? You can upload audio files up to 200 MB each. ### Why should I include the SHA-256 hash in the comparison? Enabling the SHA-256 hash option lets you verify if the two files are bit-for-bit identical, which is useful for detecting even minor edits or corruption. ### Does this tool compare the actual sound waves or audio content? It compares technical properties, metadata, and binary hashes rather than performing acoustic fingerprinting. ## Related tools - [Audio Hash](https://elysiatools.com/en/tools/audio-hash): Generate cryptographic hashes (checksums) for audio files - [Audio Podcast Loudness Compliance Report](https://elysiatools.com/en/tools/audio-podcast-loudness-compliance-report): Compare integrated LUFS, true peak, LRA, stereo/mono, bitrate and sample rate against Apple Podcasts, Spotify, YouTube, ACX and broadcast targets. - [Audio Pronunciation Compare](https://elysiatools.com/en/tools/audio-pronunciation-compare): Compare learner and reference recordings by rhythm, pitch contour, and a rough speech-spectrum proxy. - [Batch Audio Rename](https://elysiatools.com/en/tools/audio-batch-rename): Batch rename audio files using patterns, text replacement, numbering, and case conversion. Returns renamed files as a ZIP download. - [Audio Crossfade](https://elysiatools.com/en/tools/audio-crossfade): Apply a crossfade between two audio files - [Duplicate Audio Library Finder](https://elysiatools.com/en/tools/audio-duplicate-library-finder): Find exact and near-duplicate audio across uploaded files or a ZIP, including copies saved with different codecs. - [Audio Fingerprint Generator](https://elysiatools.com/en/tools/audio-fingerprint-generator): Generate an acoustic fingerprint of an audio file - [Audio Interview Level Matcher](https://elysiatools.com/en/tools/audio-interview-level-matcher): Match loudness between a host and a guest track (or any two voice takes) while preserving natural dynamics. ## Samples - [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio - [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music - [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows ## Related content - [File and Data Diff Comparison Tools](https://elysiatools.com/en/hubs/file-data-diff-comparison-tools): Compare two candidate artifacts, choose the right diff path for the format, review structural or semantic changes, and finish with integrity checks when approval needs byte-level certainty.