Convert MKV to AIFF Online Free
Extract the audio from your Matroska MKV video and save it as AIFF — Apple's uncompressed professional audio format. Perfect for importing MKV audio into Logic Pro and Mac-based studio workflows.
ChangeThisFile extracts audio from your Matroska MKV video and converts it to AIFF using FFmpeg on our secure servers. AIFF is Apple's uncompressed audio format, ideal for Logic Pro, professional DAWs, and lossless audio archiving on Mac. Files are auto-deleted, free with no signup required.
Convert Matroska to AIFF
Drop your Matroska file here to convert it instantly
Drag & drop your .mkv file here, or click to browse
Convert to AIFF instantly
Matroska vs AIFF: Format Comparison
Key differences between the two formats
| Feature | MKV (Matroska) | AIFF |
|---|---|---|
| Type | Open video container | Apple uncompressed audio container |
| Developer | Matroska.org | Apple Computer |
| Audio codec | AC-3, DTS, AAC, FLAC, PCM, etc. | Uncompressed PCM audio |
| File size | Large (HD video included) | Very large — uncompressed audio data |
| Audio quality | Variable — depends on codec in MKV | Maximum — bit-perfect PCM |
| Compatibility | Desktop players (VLC, Kodi, etc.) | macOS, iOS, Logic Pro, Pro Tools, DAWs |
| Metadata | Matroska tags | AIFF chunks: artist, album, track, cover |
| Use case | HD media library | Professional audio production, Logic Pro, mastering |
When to Convert
Common scenarios where this conversion is useful
Import MKV audio into Logic Pro for professional editing
Logic Pro does not natively open MKV files. Extract the audio as AIFF to import directly into your Logic Pro project. AIFF is Logic's preferred uncompressed format — drag it straight into the timeline as an audio region.
Get uncompressed audio for mastering from MKV sources
Mastering engineers need uncompressed source files. Convert audio from MKV media files to AIFF to provide a clean, uncompressed working file without stacking additional lossy encoding on top of existing codecs.
Extract game cinematic audio for sampler use on Mac
Video game cinematics stored as MKV can be a source of interesting sounds. Convert the audio to AIFF for use in Logic Pro's EXS24 sampler or Native Instruments Kontakt, which natively read AIFF files.
Convert MKV film audio for Pro Tools audio post-production
Audio post-production workflows on Mac often use Pro Tools with AIFF source material. Extract audio from MKV source files as AIFF for clean import into Pro Tools sessions without format-related quality concerns.
Archive high-quality audio from MKV media collection
AIFF stores audio without compression artifacts or future codec obsolescence risk. Convert audio from MKV media to AIFF for a permanent, uncompressed archive suitable for long-term preservation.
How to Convert Matroska to AIFF
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1
Upload your MKV file
Drag and drop your .mkv file onto the converter or click to browse and select it. Files up to 500MB are supported.
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2
Server-side AIFF conversion
Your MKV is uploaded over HTTPS and FFmpeg extracts and decodes the audio stream (from AC-3, DTS, AAC, PCM, or FLAC as applicable), writing it as uncompressed PCM in an AIFF container. The video is discarded.
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3
Download your AIFF file
Click Download to save the .aiff file. Note that AIFF files are large due to uncompressed audio. Both the MKV and AIFF are deleted from our servers after download.
Frequently Asked Questions
AIFF stores audio as uncompressed PCM, making it lossless from the point of decoding. If the MKV source contained lossless audio (PCM, FLAC, TrueHD), the AIFF is a perfect reproduction. If the source was lossy (AC-3, DTS, AAC), the AIFF stores an exact representation of the lossy audio without additional degradation.
Logic Pro natively supports AIFF. Files converted from MKV to AIFF can be dragged directly into the Logic timeline. They appear as standard audio regions and can be edited, processed, and exported like any other AIFF file in the project.
AIFF size depends on duration. A 5-minute audio track at 44.1 kHz stereo produces about 50MB as AIFF. An HD film MKV with 90 minutes of audio would produce approximately 900MB as AIFF — ensure you have enough local storage.
MKV supports many codecs. Blu-ray rips often contain DTS-HD or TrueHD. Downloaded HD films typically have AC-3. Anime rips may contain AAC or FLAC. FFmpeg automatically decodes whichever codec is present.
Both are uncompressed PCM with equivalent audio quality. AIFF is traditionally the Mac-native format and has better metadata support on macOS. WAV is more common on Windows. For Logic Pro on Mac, AIFF is the natural choice.
FFmpeg writes AIFF at the native sample rate and bit depth of the source audio. MKV audio is typically 48 kHz (film standard) or 44.1 kHz at 16 or 24-bit, which will be reflected in the AIFF output.
AIFF support on Windows is limited without Apple software. Pro Tools on Windows can typically open AIFF files, but WAV is more reliable for Windows-based Pro Tools installations. For Mac Pro Tools, AIFF is fully supported.
Yes. ChangeThisFile is completely free. No signup, no limits, and no fees.
Conversion is typically fast — under a minute for most videos. FFmpeg decodes and writes audio-only data without video processing. The download of the large AIFF file may take longer than the conversion itself.
Yes. All uploads use HTTPS encryption. Files are deleted from our servers immediately after you download the AIFF. We never retain, access, or share your content.
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