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DSD Player & Online Audio Player

Play DSD files (DSF, DFF) and play audio files — FLAC, MP3, WAV, Ogg, Opus, AAC, M4A — directly in your browser.

Drag and drop any music file and hit play. Native DSD decoding runs in WebAssembly, metadata and cover art are parsed locally, and nothing is uploaded.

Supported inputs

DSF DFF FLAC MP3 WAV Ogg Opus AAC M4A AIFF

A browser DSD player for every audio format you own

This is a free online DSD player built into Benefic's audio tools. You can play DSD files in the browser — .dsf and .dff — alongside lossless music files (FLAC, WAV, AIFF), lossy music files (MP3, AAC, Ogg Vorbis, Opus), and Apple's M4A. One drag and drop and the file plays. No install, no account, no upload.

The player is built for listeners who have a library of high resolution audio files sitting on a laptop or phone and want a quick way to audition them — an SACD rip from NativeDSD, a DSD master from Blue Coast Music, a hi-res FLAC purchase, a personal recording. Every audio format the tool supports is decoded locally through the same WebAssembly engine the rest of Benefic's tools use, so playback is consistent and private.

How DSD playback works in the browser

DSD (Direct Stream Digital) is a 1-bit audio format — each sample is a single bit clocked at 64×, 128×, or 256× the CD sample rate. The DSD bitstream can't be handed straight to the browser's audio pipeline, because the Web Audio API only accepts PCM samples. So this online DSD player runs a two-stage process:

  1. Decode the original DSD. The WebAssembly decoder reads the DSF or DFF container, extracts metadata (ID3v2 in DSF, Edit Master Chunk in DFF), and iterates over the 1-bit DSD samples.
  2. Convert to high resolution PCM. A decimation filter removes the shaped ultrasonic noise inherent to DSD and outputs clean PCM at the highest sample rate the Web Audio API is willing to accept on your system.

The PCM you hear is mathematically a close match to what the original DSD audio encoded. For DSD64 material, the converted PCM often measures better than native DSD playback would through a typical DAC — because a digital decimation filter can be sharper and more precise than the analog low-pass filter inside consumer DAC hardware.

Why playing DSD online requires PCM conversion

Even if you have a DSD capable DAC plugged into your computer, a browser cannot send native DSD or DoP (DSD over PCM) to it. This limitation is universal across every online music player — not specific to this tool — and it comes from three layers of the web stack:

  • The Web Audio API is only supported for PCM. There is no browser interface for submitting a raw 1-bit DSD stream or a DoP-framed 24-bit PCM stream that a DAC would interpret as DSD.
  • Browsers cannot open a USB Audio Class 2 raw-data endpoint. The alternate-setting negotiation that native DSD playback depends on is not exposed to web pages.
  • The OS mixer would break the DoP marker bytes. DoP works by alternating 0x05 and 0xFA marker bytes in the upper 8 bits of each 24-bit PCM frame. Any volume control, sample rate conversion, or channel mixing rewrites those bits, so the DAC stops seeing a DSD stream and starts hearing noise.

That's why this DSD player — and every other browser-based DSD playback tool on the internet — converts DSD to PCM before your DAC sees anything. For most listeners and most hardware, the converted PCM sounds excellent and is a valid way to enjoy DSD audio. For listeners whose DACs have a bit-perfect 1-bit signal path they want to exercise, a native desktop music player is required.

Native desktop DSD playback is coming soon

The Benefic desktop app (in active development) will close the output gap that the web can't. When it ships, it will open sound devices directly — CoreAudio on macOS, ALSA on Linux, WASAPI / ASIO on Windows — and support two output paths for DSD:

  • DoP output on macOS, Linux, and any Windows DAC with a DoP-compatible driver. The original DSD bitstream is packed into 24-bit PCM frames with the standard marker bytes and sent bit-perfectly to your DSD capable hardware.
  • Native DSD output on DACs that advertise a USB Audio Class 2 raw-data endpoint. No framing overhead, just the 1-bit stream straight into your DAC's modulator.

For listeners who want playing DSD to mean "my DAC receives exactly the bits on the disc," the desktop app is the intended path. For listeners who just want to play DSD files and other audio files on the fly, the online player on this page already handles it — today, in any browser.

For a longer read on the difference between streaming digital audio as PCM versus bit-perfect DSD, see the guide on how to play DSD files online and the deep dive on DoP versus native DSD .

Frequently asked questions

Everything you might wonder about playing DSD and other audio files in Benefic.

What is this DSD player and what can it do?

It's a free online DSD player that lets you play DSD files (DSF and DFF) directly in your browser, alongside every other common audio format — FLAC, MP3, WAV, Ogg Vorbis, Opus, AAC, M4A, and AIFF. DSD playback runs through a WebAssembly decoder so you don't need the browser's audio element to support the format. Metadata (title, artist, album, year, genre, cover art) is extracted from your music files locally. The original DSD bitstream is decoded and then played through the Web Audio API. Your audio files never leave your device.

How do I play DSD files online in this player?

Drag and drop a .dsf or .dff file onto the import area, or click to browse. The file is decoded in WebAssembly, the shaped ultrasonic noise is removed by a decimation filter, and the resulting high resolution PCM is streamed to your audio output. DSD64, DSD128, and DSD256 are all supported. You can do the same with any non-DSD music file — just drag, drop, and press play.

Can this player send native DSD or DoP to a DSD capable DAC?

No — and no browser-based player can. Web Audio is PCM only. Browsers expose no way to open a USB Audio Class 2 raw-data endpoint or to write the alternating 0x05 / 0xFA marker bytes of DoP to a sound device without the OS mixer corrupting them. So even with a DSD capable DAC attached, the web player only supports streaming digital audio as PCM after converting the original DSD bitstream. For native DSD or DoP output to your DAC, a native desktop music player is required — the Benefic desktop app is coming soon and will ship with both.

Which audio formats are only supported on desktop, and which work online?

Every format the player lists — DSF, DFF, FLAC, MP3, WAV, Ogg, Opus, AAC, M4A, AIFF — plays online in this browser-based player. What's only supported in a native desktop app is bit-perfect output: DoP (DSD over PCM) and native DSD to a DSD capable DAC. All format decoding happens in the browser today; only the output path is restricted.

Which DSD sample rates does this online DSD player support?

DSD64 (2.8224 MHz), DSD128 (5.6448 MHz), and DSD256 (11.2896 MHz). After decoding, the DSD audio is resampled to whatever sample rate the Web Audio API is running at on your system — typically 44.1 kHz or 48 kHz. The full audible-band content of the original DSD is preserved; only ultra-high-rate output (e.g. 176.4 kHz / 352.8 kHz) requires a native desktop music player that can open the sound device directly.

Is playback streamed or buffered?

The file is decoded incrementally in WebAssembly and the resulting high resolution PCM is fed to Web Audio through a ring buffer. No network round-trips happen once the page has loaded, and the decoder keeps pace with playback rather than converting the whole file up front — so even large DSD and FLAC files start playing almost immediately.

Do my audio files get uploaded to a server?

No. Everything runs in your browser. The original DSD bitstream — or whatever music file you drop in — stays on your device, is read directly into the WebAssembly decoder, and is released when you drop a new file or close the tab. Nothing is uploaded, logged, or cached on a server.

Does it work offline?

Yes, once the page has loaded. The player is a static page plus a WebAssembly module — after the first visit your browser can run it without a network connection.