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High Resolution Downloads

Introducing Hi-Res Downloading

Digital downloads have become a staple of many people collections, just as the difference MP3’s ended the dominance of CDs.

MP3’s have introduced a diverse shopping process, allowing people to buy single tracks from albums, download entire movies in moments and use new technology to introduce these streaming and media playback into your home systems.

Martins Hifi has always championed the high-quality reproduction of music allowing you to hear it as the artist intended. This is our guide to the world of downloading music and the terms used and what they mean.


What is High Res Audio?

Generally, when you purchase songs from iTunes or Amazon you are buying MP3’s, these are also known as “lossy” compressed files.

Audio Bit Rate is the term used to compare the amount of data, In the U.S., Kbps stands for kilobits per second (thousands of bits per second) and is a measure of bandwidth (the amount of data that can flow in a given time).

The Audio Bit Rate for a CD is 1411 kbps whereas the average mp3 download is only 256kbps. This can explain why you often feel that digital media files can feel flat and limp.

Hi-Res Audio downloads should always be around 4608kbps, allowing a lot more room for all of the digital information allowing a better, clearer and a true reproduction of the artist's music.

When you purchase high res downloads they often come in several formats, this is simply to ensure that your device is compatible to at least one of the types of files, the other selection will be lossless compressed or uncompressed. The general rule of thumb is that the lossless uncompressed will be 50% larger than the compressed and therefore take up more room on your hard drive or device.


Uncompressed files

PCM – the basic audio file format for digital music, whether it's MP3, CD-quality, or high-resolution.

WAV – the main audio format for Windows-based computers.

AIFF – the main audio file format for Apple® computers.

DSD – the only non-PCM-based file type listed here. This format stores audio in a fundamentally different way than PCM.



Lossless-compressed files

FLAC – a popular lossless audio option, however, it’s not compatible with some music playback software, including iTunes.

ALAC– aka Apple Lossless, the main lossless audio option for Apple computers.

WAV – the main audio format for Windows-based computers.

Resolution Options

Besides choosing the file format, you can also usually have a few resolution options.

For digital audio files, there are two key pieces of information: “word-length” and “sampling frequency.”

CD has a word length of 16 bits and a sampling frequency of 44,100 Hertz (a Hertz equals one cycle per second). You typically see resolution specs abbreviated so that CD-quality files are listed as 16-bit/44.1kHz.


You can achieve better-than-CD sound quality through higher word lengths, higher sampling frequencies, or both. High-res audio is typically 24-bit, with a sampling frequency of 88.2kHz or higher. Except for DSD, all of the file types we’ve mentioned so far use the same basic digital audio format, called PCM. PCM takes snapshots of the musical waveform – the word length measures how detailed the snapshot is, and the sampling frequency tells you how many snapshots per second. Taking more detailed snapshots, and many more of them, can produce a more accurate “picture” of the musical performance, but all that extra data creates a much bigger file. A 24-bit/96kHz music file will take up about three times more hard drive space than a CD-quality file.

DSD is a digital audio format that stores audio differently than PCM. It’s a “1-bit” system, which means that the music signal is processed as a stream of single bits rather than multi-bit chunks. A few websites offer DSD music downloads, and a small but growing number of components can play DSD files.


Quick Comparison Guide


File Type

Word Length

Sampling Rate

Bit Rate

Albums per 1tb




256 kbps



16 bit


1411 kbps


High Res 24/96

24 bit


4608 kbps




MQA files are formatted as standard PCM files (FLAC, AIFF, WAV, etc.). If you don't have an MQA DAC, the file will play on any regular DAC with slightly-better-than-CD sound quality. But if you have an MQA-capable DAC, the file will "unfold" the high-resolution information and deliver the resolution of the original studio master


Stand Alone Units

There is one more solution for the High Res Audio revolution, companies such as Arcam are producing stand-alone units giving you all the advantages of a large system but compact enough to be house in a single box and connected straight to your speakers. Featuring a SACD/CD drive and 160W of amplification in a stylish, low-resonance enclosure, the Solo music provides high-quality room-filling sound. Four HDMI™(1.4b), coax, optical, phono and 3.5mm line inputs allow for flexible system building without being over complex. Audio can also be streamed to the Solo Music via Bluetooth and also UPnP network either wired or wirelessly. Finally, an FM/DAB/DAB+ tuner is available. Audiophile design ensures that absolutely no sonic detail is lost. The music is supplied with a multi-page learning backlit remote control.

From our High Resolution Downloads customers

Hi Ian just to let you know that I'm really happy with my Rotel ra 1592 it sounds fantastic with my cm9s." more GL Shire - Gloucestershire
January, 2019
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