SHN to M4A Converter

Encode Shorten audio into Apple M4A format online

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Settings

Set the AAC audio bitrate per channel. For example, stereo audio with 128 kbps set here will produce a 256 kbps file. If set to "Custom", the recommended range is ≥64 kbps.
Set the number of audio channels. This setting is most useful when downmixing channels (e.g., from 5.1 to stereo).
Set the sample rate of the audio. Music with a full spectrum (20 Hz — 20 kHz) requires values not lower than 44.1 kHz to achieve transparency. More info can be found on the wiki.

shn

Shorten (SHN) is a lossless audio compression codec created by Tony Robinson at SoftSound and first published in 1993, making it one of the earliest practical lossless compressors. The algorithm uses linear prediction to estimate each sample from predecessors, then encodes residuals with Huffman or Golomb-Rice codes. Compression ratios typically fall between 2:1 and 3:1, with the guarantee that decoded output is bit-identical to the original. Shorten gained cultural significance in the late 1990s as the preferred format for trading live concert recordings online — communities like etree.org built entire distribution networks around SHN files, and bands like the Grateful Dead and Phish tacitly endorsed the practice. One advantage was the format's simplicity: encoding and decoding ran fast even on modest Pentium-era hardware. Another strength was deterministic output — the same input always produced the same bytes, making checksums reliable for verifying integrity across thousands of traders. While FLAC eventually superseded Shorten with better compression, seeking support, and embedded metadata, SHN retains historical importance and extensive live music archives in the format still circulate today.
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m4a

M4A is Apple's preferred file extension for audio-only content inside an MPEG-4 Part 14 container, widely adopted after the launch of the iTunes Music Store in 2003. The extension distinguishes pure audio streams from video-capable MP4 files, signaling to players that no video track is present. Under the hood, an M4A file most commonly wraps an AAC-LC (Advanced Audio Coding, Low Complexity) bitstream, though Apple Lossless (ALAC) payloads also use the same extension. AAC-encoded M4A files deliver better sound quality than MP3 at equivalent bit rates, thanks to improved spectral band replication, temporal noise shaping, and a refined psychoacoustic model. Sample rates up to 96 kHz and bit depths up to 24-bit are supported. Apple ecosystem integration is seamless — iTunes, Apple Music, iPhone, iPad, and macOS all handle M4A natively — while third-party support spans VLC, foobar2000, Android, and most car infotainment systems. Three tangible benefits define the format: superior coding efficiency over older lossy codecs, rich metadata through the MP4 atom structure (artwork, chapters, lyrics), and dual-mode flexibility serving both lossy and lossless workflows.
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Apple Ready

M4A is the default format for Apple Music and iTunes — converting from SHN integrates your audio into the Apple world.

Quality Control

Choose your M4A bitrate from 128 to 320 kbps — encoded from lossless SHN for the best possible results.

Secure Conversion

SHN uploads are erased immediately. M4A downloads are purged from servers within 24 hours.

How to convert SHN to M4A

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose m4a or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your m4a file right afterwards

About formats

Shorten (SHN) is a lossless audio compression codec created by Tony Robinson at SoftSound and first published in 1993, making it one of the earliest practical lossless compressors. The algorithm uses linear prediction to estimate each sample from predecessors, then encodes residuals with Huffman or Golomb-Rice codes. Compression ratios typically fall between 2:1 and 3:1, with the guarantee that decoded output is bit-identical to the original. Shorten gained cultural significance in the late 1990s as the preferred format for trading live concert recordings online — communities like etree.org built entire distribution networks around SHN files, and bands like the Grateful Dead and Phish tacitly endorsed the practice. One advantage was the format's simplicity: encoding and decoding ran fast even on modest Pentium-era hardware. Another strength was deterministic output — the same input always produced the same bytes, making checksums reliable for verifying integrity across thousands of traders. While FLAC eventually superseded Shorten with better compression, seeking support, and embedded metadata, SHN retains historical importance and extensive live music archives in the format still circulate today.
Initial release: 1993
M4A is Apple's preferred file extension for audio-only content inside an MPEG-4 Part 14 container, widely adopted after the launch of the iTunes Music Store in 2003. The extension distinguishes pure audio streams from video-capable MP4 files, signaling to players that no video track is present. Under the hood, an M4A file most commonly wraps an AAC-LC (Advanced Audio Coding, Low Complexity) bitstream, though Apple Lossless (ALAC) payloads also use the same extension. AAC-encoded M4A files deliver better sound quality than MP3 at equivalent bit rates, thanks to improved spectral band replication, temporal noise shaping, and a refined psychoacoustic model. Sample rates up to 96 kHz and bit depths up to 24-bit are supported. Apple ecosystem integration is seamless — iTunes, Apple Music, iPhone, iPad, and macOS all handle M4A natively — while third-party support spans VLC, foobar2000, Android, and most car infotainment systems. Three tangible benefits define the format: superior coding efficiency over older lossy codecs, rich metadata through the MP4 atom structure (artwork, chapters, lyrics), and dual-mode flexibility serving both lossy and lossless workflows.
Developer: Apple Inc.
Initial release: 2001

Frequently Asked Questions

Why convert SHN to M4A?

M4A is the native Apple format for iTunes and iPhone. SHN has no Apple support whatsoever, making M4A the essential bridge.

What is M4A?

M4A is a container holding AAC audio with support for album art, lyrics, and metadata — the standard for Apple devices.

Will quality be good?

Yes — encoding from lossless SHN gives the AAC encoder perfect input, producing top-quality M4A output.

Does M4A work on Android?

Yes — modern Android devices handle M4A playback natively without any extra applications.

Is the process private?

SHN uploads are deleted right after conversion. M4A results are purged within 24 hours.

SHN to M4A Quality Rating

4.8 (11 votes)
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