--- title: "DSD vs PCM: What DSD Audio Is and Whether It Matters" description: "What DSD is, how it differs from PCM, what DSD64 to DSD512, DoP and native DSD mean, and whether DSD support should decide which DAC you buy." url: "https://theaudiostuff.com/glossary/dsd/" type: "article" author: "Jakub Charkiewicz" published: "2026-09-25T00:00:00.000Z" modified: "2026-09-29T00:00:00.000Z" --- > Markdown rendering of https://theaudiostuff.com/glossary/dsd/ > Canonical URL to cite: https://theaudiostuff.com/glossary/dsd/ > Generated from the published page. Text and links only; see the HTML for layout. Breadcrumb: [Home](https://theaudiostuff.com/) > [Glossary](https://theaudiostuff.com/glossary/) > DSD # What is DSD audio, and does your DAC need to play it? {#term-title} DSD (Direct Stream Digital) stores audio as a one-bit stream at 2.8224 MHz or a multiple of it, where PCM stores multi-bit samples at a fixed rate. Noise shaping moves its large rounding error above the audible band, so DSD is a different set of trade-offs from PCM. Most current DACs play it, which makes DSD support matter only if you own DSD recordings. - By [Jakub Charkiewicz](https://theaudiostuff.com/authors/jakub-charkiewicz/) - Published Sep 25, 2026 - Updated Sep 29, 2026 - 5 min read ## Glossary definition {#term-define-title} - **DSD**: Direct Stream Digital, a 1-bit, high-sample-rate audio format used on SACD, encoding audio through rapid single-bit switching rather than multi-bit PCM words. ## What a one-bit stream stores {#what-a-one-bit-stream-stores} DSD records audio as a single bit, taken far faster than the [PCM](https://theaudiostuff.com/glossary/dsd/#how-pcm-differs-and-why-studios-work-in-it) rates music is released at. The original rate, now called DSD64, is 2.8224 MHz, which is 64 times the 44.1 kHz of a CD. Each doubling has its own name: DSD128 runs at 5.6448 MHz, DSD256 at 11.2896 MHz and DSD512 at 22.5792 MHz. One bit can only say up or down, so the music lives in the density of the pulses. A run of mostly ones describes a high voltage, and an even mix of ones and zeros describes zero. That stream is what a [delta-sigma](https://theaudiostuff.com/glossary/delta-sigma/) modulator produces, stored as it is, without the step that would normally turn it into multi-bit samples. Sony and Philips developed [DSD](https://theaudiostuff.com/glossary/#dsd) in the 1990s, first for archiving analog master tapes and then as the format of the Super Audio CD. ## How PCM differs, and why studios work in it {#how-pcm-differs-and-why-studios-work-in-it} PCM, pulse-code modulation, is the format behind nearly all other digital audio. Each sample is a multi-bit number giving the signal's level at one instant, taken at a fixed rate. A CD carries 16 bits at 44.1 kHz, and studio work commonly runs at 24 bits and 48 to 192 kHz. Almost every [FLAC](https://theaudiostuff.com/glossary/#flac), WAV or ALAC file is PCM, at a [sample rate](https://theaudiostuff.com/glossary/sample-rate/) and [bit depth](https://theaudiostuff.com/glossary/bit-depth/) the file states, and lossy streams and MP3s are decoded to PCM before they reach the [DAC](https://theaudiostuff.com/glossary/dac/). Production happens in PCM because a level change, an EQ or a crossfade is arithmetic on sample values, and a one-bit stream has no sample values to work on. To mix or equalize DSD, a workstation converts it to PCM, processes it and modulates the result back. The format made for that is DXD, 24 or 32 bits at 352.8 kHz. Many releases sold as DSD were recorded, edited or mastered in PCM before a final conversion, and some came from ordinary 44.1 or 48 kHz masters. ## The ultrasonic noise DSD carries {#the-ultrasonic-noise-dsd-carries} On its own, one bit would give a hopeless signal-to-noise ratio. DSD works because of noise shaping: the modulator's feedback loop pushes the rounding error out of the audible band. In DSD64 the noise stays very low up to about 20 kHz, then climbs steeply and is large by 50 kHz. You can't hear that noise, but amplifiers and tweeters still have to handle it, so DSD players and DACs low-pass filter it, commonly around 50 kHz for DSD64. The higher rates exist mostly for this reason. Each doubling moves the noise up an octave, so the filter can be gentler and sit further from the music. A PCM file made from a DSD master often keeps the signature, a [noise floor](https://theaudiostuff.com/glossary/noise-floor/) that rises steadily above the audible band. The [hi-res audio checker](https://theaudiostuff.com/tools/hires-audio-checker/) draws the spectrum of any FLAC or WAV you drop in, though it can't open DSD files themselves. ## Getting DSD from a computer to a DAC {#getting-dsd-from-a-computer-to-a-dac} DoP, or DSD over PCM, packs the one-bit data into ordinary 24-bit PCM frames: 16 bits of DSD in each sample, plus a marker byte that tells the DAC to switch modes. The packing costs space, so DSD64 needs a 176.4 kHz PCM channel, DSD128 needs 352.8 kHz and DSD256 needs 705.6 kHz. The path must be [bit-perfect](https://theaudiostuff.com/glossary/#bit-perfect). A system mixer, a software volume control or a resampler breaks the markers, and the DAC then plays the data as PCM, which comes out as noise. Native DSD sends the stream directly. On Windows that usually means the maker's [ASIO](https://theaudiostuff.com/glossary/#asio) driver, because the built-in USB audio driver handles DoP only. On a Mac, DoP is the normal route. DSD512 generally travels natively, since DoP would need a PCM rate few interfaces accept. Each input has its own ceiling. Coaxial and optical links carry DSD only as DoP, and at their usual 192 kHz limit that means DSD64. The [Tonewinner AD-2PRO+](https://theaudiostuff.com/reviews/tonewinner-ad-2pro-plus/) takes DSD512 over USB while its optical and coaxial inputs stop at 192 kHz, and the [HIFIMAN Serenade](https://theaudiostuff.com/reviews/hifiman-serenade/) plays DSD256 over USB and DSD512 through its network [streamer](https://theaudiostuff.com/glossary/streamer/). ## What the DAC does with it inside {#what-the-dac-does-with-it-inside} The picture of a pure one-bit path from file to speaker rarely holds. Almost every modern DAC chip is a [delta-sigma](https://theaudiostuff.com/glossary/delta-sigma/) design running a multi-level modulator of its own, and in many of them an incoming DSD stream is filtered and remodulated into that internal format, just as PCM is. "Native DSD" on a spec sheet usually means the stream skipped conversion to PCM on the computer. It doesn't promise that the original bits drive the output untouched. The files come as DSF, which handles tags and artwork well, or DFF, an older format with patchier tag support. Uncompressed stereo DSD64 runs at four times the CD bitrate, about 5.6 Mbit/s, or roughly 42 MB a minute. ## Does DSD support matter when you buy? {#does-dsd-support-matter-when-you-buy} Only if you own DSD recordings. Support is built into most current DAC chips, so it costs a maker very little: the $89 [SMSL PS200](https://theaudiostuff.com/reviews/smsl-ps200/) plays up to DSD512. That also means a DSD512 badge says nothing about a DAC's analog stage, noise or filtering. The [Henry Audio DA 256](https://theaudiostuff.com/reviews/henry-audio-da-256/) leaves DSD out on purpose, because supporting it would have meant an [FPGA](https://theaudiostuff.com/glossary/#fpga) or a much smaller choice of chips, and its review notes that DSD only matters if you have SACD rips. Whether DSD sounds better than high-rate PCM is argued over. Both cover the audible band at their standard rates and place their compromises differently: DSD parks noise just above the audible band and relies on a filter, while high-rate PCM usually keeps its noise floor flat. In the double-blind tests Blech and Yang ran at Detmold, hardly any listeners reliably told the two apart. When a DSD release does sound different, a different master is the likelier cause. If DSD isn't part of your library, choose on everything else, and the [DAC guide](https://theaudiostuff.com/guides/best-dacs/) is the place to start. ## Reviewed gear that shows this {#term-products-title} 12 reviews in the catalogue, highest-scoring 6 shown. Each score is set against its own category's reference. - [![Matte-black HIFIMAN Serenade on a white desk, three buttons on its raised front, the volume knob at right](https://theaudiostuff.com/images/thumb/hifiman-serenade-front-panel-160.avif) HIFIMAN Serenade Reference $999 Score 9.3 out of 10](https://theaudiostuff.com/reviews/hifiman-serenade/) - [![Denafrips Enyo 15th Anniversary front panel: metal input and OS/NOS buttons under sample-rate labels](https://theaudiostuff.com/images/thumb/denafrips-enyo-15th-front-panel-160.avif) Denafrips Enyo 15th Anniversary Highly Recommended $699 Score 9.1 out of 10](https://theaudiostuff.com/reviews/denafrips-enyo-15th/) - [![Henry Audio DA 256 in brushed aluminum on a wood base, with one small LED and a USB-C port on the front](https://theaudiostuff.com/images/thumb/henry-audio-da-256-full-unit-160.avif) Henry Audio DA 256 Recommended €1,600 about $1,730 Score 8.2 out of 10](https://theaudiostuff.com/reviews/henry-audio-da-256/) - [![HIFIMAN EF500 tower next to its retail box, a small gain and oversampling selector above the volume knob](https://theaudiostuff.com/images/thumb/hifiman-ef500-front-panel-160.avif) HIFIMAN EF500 Recommended $549 Score 8.2 out of 10](https://theaudiostuff.com/reviews/hifiman-ef500/) - [![SMSL DL100 with its display reading OFF, a hand on the volume knob and 6.35 mm and 4.4 mm jacks at left](https://theaudiostuff.com/images/thumb/smsl-dl100-front-panel-160.avif) SMSL DL100 Recommended $179 Score 8.2 out of 10](https://theaudiostuff.com/reviews/smsl-dl100/) - [![HIFIMAN EF499 standing upright, a gold knob under four lights for High or Low Gain with NOS or OS](https://theaudiostuff.com/images/thumb/hifiman-ef499-front-panel-160.avif) HIFIMAN EF499 Recommended $299 Score 8.1 out of 10](https://theaudiostuff.com/reviews/hifiman-ef499/) ## What our reviews say about DSD {#term-said-title} 7 reviews raise it in their pros and cons: 6 lines credit it and 1 faults it. 4 are shown, each quoted as its review states it. - Strength: Built-in DAC with USB DSD512 / PCM 32-bit/768kHz support - [Tonewinner AD-2PRO+](https://theaudiostuff.com/reviews/tonewinner-ad-2pro-plus/), 8.8/10 - Strength: MQA / MQA-CD decoding, DSD512, PCM 32-bit/768kHz - [SMSL DO100 PRO](https://theaudiostuff.com/reviews/smsl-do100-pro/), 8.0/10 - Strength: PCM 768kHz/32-bit, DSD512 - [SMSL PS200](https://theaudiostuff.com/reviews/smsl-ps200/), 7.0/10 - Strength: XMOS XU316 controller handles high-resolution PCM and DSD - [Douk Audio U2 Pro](https://theaudiostuff.com/reviews/douk-audio-u2-pro/), 6.5/10 ## Compared head to head {#term-h2h-title} Comparisons between products on this page, each weighing the two reviews side by side. - [HIFIMAN EF499 vs HIFIMAN EF500](https://theaudiostuff.com/compare/hifiman-ef499-vs-hifiman-ef500/) - [Henry Audio DA 256 vs SMSL DO100 PRO](https://theaudiostuff.com/compare/henry-audio-da-256-vs-smsl-do100-pro/) - [Henry Audio DA 256 vs SMSL RAW-MDA1](https://theaudiostuff.com/compare/henry-audio-da-256-vs-smsl-raw-mda1/) - [SMSL DL100 vs SMSL DO100 PRO](https://theaudiostuff.com/compare/smsl-dl100-vs-smsl-do100-pro/) ## Put it to use {#term-use-title} - [Analyzer Is this file really hi-res? FLAC & Hi-Res Audio Checker](https://theaudiostuff.com/tools/hires-audio-checker/) - [Buying guide Best DACs This guide is for anyone adding a DAC under $2,000 to a desk, a TV or a hi-fi rack, and its picks run from $29 to €1,600. 8 ranked picks, led by the Denafrips Enyo 15th Anniversary](https://theaudiostuff.com/guides/best-dacs/) ## Sources and further reading {#term-sources-title} - [Reiss and Sandler (2004): Digital audio effects applied directly on a DSD bitstream](https://www.dafx.de/paper-archive/2004/P_372.PDF) Paper DAFx, the Digital Audio Effects conference PDF Defines DSD as 1-bit at 2.8224 MHz with noise shaped above hearing, and explains why editing it is hard. - [Blech and Yang (2004): Perceptual discrimination of digital audio coding formats](https://aes.org/publications/elibrary/elibrary-page/?id=12799) Paper Audio Engineering Society Paid full text Double-blind ABX tests at Detmold in which hardly any listeners reliably told high-rate PCM from DSD. - [Wikipedia: Direct Stream Digital](https://en.wikipedia.org/wiki/Direct_Stream_Digital) Encyclopedia Wikipedia ## Keep reading {#term-more-title} - ### [Sample Rate](https://theaudiostuff.com/glossary/sample-rate/) How many audio samples are captured per second; 44.1kHz captures frequencies up to 22.05kHz (Nyquist limit), well above the 20kHz hearing limit. - ### [DAC](https://theaudiostuff.com/glossary/dac/) Digital-to-Analog Converter, a device that translates binary audio data into an analog electrical signal that can be amplified and heard. - ### [Delta-Sigma](https://theaudiostuff.com/glossary/delta-sigma/) The dominant DAC architecture today, using high oversampling and noise shaping to push quantization noise above the audible range. - [The full audio glossary](https://theaudiostuff.com/glossary/) - [How we test](https://theaudiostuff.com/about/how-we-test/) Written by ## [Jakub Charkiewicz](https://theaudiostuff.com/authors/jakub-charkiewicz/) {#term-author-title} Founder & lead reviewer Writing for The Audio Stuff since May 2023 [Everything by Jakub](https://theaudiostuff.com/authors/jakub-charkiewicz/) [@TheAudioStuff](https://www.youtube.com/@TheAudioStuff) [LinkedIn](https://www.linkedin.com/in/jakub-charkiewicz) [Report a correction](mailto:contact@theaudiostuff.com?subject=Correction%3A%20DSD%20explainer&body=Page%3A%20https%3A%2F%2Ftheaudiostuff.com%2Fglossary%2Fdsd%2F%0A%0AWhat%20looks%20wrong%2C%20and%20where%20you%20read%20the%20right%20figure%20(if%20you%20have%20a%20source)%3A%0A%0A)