8D Audio

8D audio is a stereo production effect: panning, delay and reverb make a track seem to orbit your head. It is not eight channels, and the illusion needs headphones. This page is a free 8D audio converter that renders the orbit from a song, voice note or music video in your browser, with no upload and no signup.

What is 8D audio?

The effect — usually called 8D music or an 8D audio song — comes from four cues, all inside two channels.

• Equal-power panning. Each side gets L = cos((pan + 1)π/4) and R = sin((pan + 1)π/4), keeping total power roughly constant through the centre.
• Interaural time difference (ITD). When the source is to one side, the far ear receives it later — up to about 0.65 ms here, an externalisation cue auto-panners omit.
• Head shadow. The head blocks high frequencies on the far side, so the far ear is low-pass filtered toward roughly 3–4 kHz. The source feels beside the head, not inside it.
• Reverb. A decorrelated stereo reverb places the source in a room and fills gaps between hard pans. Too much smears transients; the wet/dry mix is adjustable.

Front and rear are the hardest cues to fake without a measured HRTF. Level, delay, filtering and reverb only approximate a rear pass; the sound localization test measures front/back accuracy better. For the full explanation, see what 8D audio is.

Two modes: music & music video, or any audio

The first choice is a workflow: music rewards movement on the beat, speech rewards stability.

Music & music video	Voice & general audio
Beat-synced orbit, genre presets, MP4 in/out	Slower, intelligibility-first, audio only
Pop, EDM, hip-hop, rock, acoustic, lo-fi, cinematic	Speech/podcast, ASMR, audiobook, sound effect
Detects BPM and can sync one orbit per bar or phrase	Manual speed/depth, low reverb

Center Focus: keep bass and voice centred

A full-band orbit moves the kick and vocal with everything else: spectacular on an instrumental, unstable when the voice must stay in front. Center Focus splits the signal at 120 Hz and 4 kHz.

Bass mono sums everything below 120 Hz to mono and holds it at the centre, so sub and kick stop swinging between speakers and avoid woofer pumping or phase cancellation. Voice focus (0 to 1) reduces mid-band (120 Hz–4 kHz) orbit depth by up to 70 percent at 1; highs above 4 kHz keep moving.

Music mode defaults to 0.5 with bass mono on; voice mode to 0.75, also with bass mono on. Lower voice focus to 0–0.2 for instrumental EDM. This is band-based focus, not stem separation: it cannot isolate a vocal, and a snare sharing the mid band is reduced too.

What this 8D audio converter does

This page renders new stereo audio where the source appears to orbit the listener. You control path, speed, depth, reverb, bass, Center Focus, loudness target and, for video, a vertical visual. Preview and download use the same local chain.

How to make 8D audio from a song

1. Load a song. Drag in audio or a music video, or browse for a file. The page reads duration, sample rate and channels and rejects unsupported files.
2. Choose a motion. Pick Music & music video or Voice & general audio, then Classic 8D, Wide, 16D, Figure-8, Pendulum or Whisper. In music mode, Detect tempo locks the orbit to the beat.
3. Preview with headphones. Render a short excerpt and listen on headphones. If the effect is unclear, run the 8D audio test first; speakers will not demonstrate the orbit.
4. Adjust the orbit. Change speed (2–24 seconds per revolution), depth (40–100 percent), reverb (0–60 percent), bass (0 to +6 dB) and Center Focus. Detect tempo, align the first downbeat, or add timeline markers. Re-render after each change.
5. Download the render. Choose a loudness target, read Render Check, then save the stereo file, MP4 or 9:16 visual. Play it on a second device and check it in mono before publishing.

Whisper mode: a front-hemisphere pass

Whisper mode is a gentler path for close voices. It travels left ear, front, right ear, then front again, and never passes behind the head.

It is tuned rather than left to the sliders: 18–24 seconds per turn, depth 0.45–0.55, reverb at or below 0.18 and bass at 0. The slow, shallow front arc suits ASMR, whispered vocals and quiet narration, where a rear cue would sound unnatural.

Use low volume and take breaks; motion can still fatigue. Whisper is a comfort-oriented preset, not a medical guarantee, and it is not for emergency, medical or legal recordings.

8D audio vs 16D, binaural and Dolby Atmos

Format	What is actually rendered	Channels	Headphones needed	Honest summary
8D	One source on a circular or figure-8 path, with pan, ITD, head shadow and reverb	2 (stereo)	Yes	A production effect, not a format
16D	Two counter-rotating layers plus slow elevation cues	2 (stereo)	Yes	A wider-sounding 8D variant; the name is marketing
Binaural	A source rendered with HRTF-style filtering for each ear	2 (stereo)	Yes	A rendering approach; accuracy depends on the HRTF
Dolby Atmos	Bed audio plus positional objects, rendered to the playback system	Object-based, not fixed at 2	Recommended for the binaural mix	A real immersive format with a decoder

8D and 16D are stylistic orbits; binaural is a rendering technique; Atmos is object-based. Binaural beats are steady tones; the surround sound test checks speakers.

8D audio settings: speed, depth and reverb

Defaults: Classic 8D, 10 seconds, 85 percent depth, 28 percent hall reverb, +2 dB bass; Center Focus 0.5 music, 0.75 voice.

Preset	Seconds per revolution	Depth	Reverb	Bass	Best for
Classic 8D	10	85%	28% hall	+2 dB	The familiar TikTok and YouTube orbit
Wide	12	100%	32% hall	+2 dB	EDM, pop and big choruses
16D dual-orbit	8	90%	35% plate	+3 dB	Short clips that need a dramatic swirl
Figure-8	14	75%	24% room	+1 dB	Vocals and tracks that already have width
Pendulum	16	60%	20% room	+1 dB	Background listening and long sessions

Faster revolutions tire the ear; slower ones are subtle on a phone. Depth is travel: 100 percent is a hard pan. Reverb above 40 percent washes out drums.

Energy-reactive motion follows a smoothed envelope with fast attack and slow release. At amount 0.5 it moves depth by up to ±10 percent and reverb by ±5 percent; amount 1 doubles that. Speed stays constant.

Reverb polish: pre-delay (0–40 ms) separates the dry transient, the wet high-pass (80–400 Hz) prevents low-end buildup, damping tames bright tails, early reflections add closeness, and stereo depth widens the wet signal. Room is tight, Hall is long, Plate is bright.

Best settings for TikTok, YouTube, ASMR and study

TikTok, Reels and Shorts

Use Classic 8D or 16D at about 8 seconds per revolution, 90 percent depth, 25 percent reverb and +2 dB bass. A 15- to 30-second excerpt gives two or three orbits. Set −14 LUFS, export the 9:16 visual and say “headphones” in the caption.

YouTube

Classic 8D at 10–12 seconds, 85 percent depth, 28 percent reverb and +2 dB bass suits a full song. Leave intro and outro intact, and avoid 4-second revolutions. Use −14 LUFS and check true peak.

ASMR and study

For ASMR, use Voice mode or Whisper with Center Focus high and −16 LUFS. For study, Pendulum at 16–20 seconds, 50–60 percent depth, 15–20 percent reverb and 0 to +1 dB bass is least distracting.

8D audio for music videos

Load an MP4, MOV or WebM and the tool extracts the first audio track, renders the orbit, then writes an MP4 that keeps the original picture and replaces only the audio. The video is copied packet by packet, not re-encoded.

Beat sync can lock the orbit to a grid: one revolution per 1, 2, 4 or 8 bars. A turn that begins and ends on a bar line feels deliberate.

Choose −14 LUFS, check true peak and preview the exact section before export. Keep the original as a backup; video adds a second copyright layer.

9:16 visualizer videos for TikTok, Reels and Shorts

The converter can render a vertical visual instead of only audio: 1080 × 1920 at 30 fps, in 15- or 30-second lengths, with an orbit/head/emitter scene, waveform or energy bars, your title, an 8D AUDIO / USE HEADPHONES badge and the site URL. It writes MP4 when supported and falls back to WebM. Audio-only export always remains.

Short-form platforms are vertical and often watched on mute, so a moving orbit and headphones badge explain the effect before playback. The clip is generated, not an edit of your footage; keep titles inside the safe area.

Motion timeline: depth and reverb by section

A single depth and reverb setting must compromise: wide for the chorus, narrow for the verse. Timeline markers set depth and reverb at named points — Intro, Verse, Chorus, Drop, Bridge or Custom — in source-file time, with linear interpolation and the nearest value held outside the span.

With fewer than two markers the static sliders apply. Two markers can pull a verse in and open a chorus; a Drop marker can push depth to 100 percent for four bars. Version 1 automates depth and reverb only: preset, speed and Center Focus stay static. Re-render and listen through the transition.

Auto-clip and the creator kit

Auto-clip finds a 15-, 30- or 60-second window. It scans the energy envelope, favours windows that start on a bar line when BPM is known, and sets the trim. It is a heuristic: check the first and last second and nudge a mid-phrase cut.

The creator kit turns the render into release material: cover art at 1080 × 1080 or 1280 × 720, short release text and hashtags, and a checklist for loudness, headphones, credits and rights. Cover art is a simple generated layout, not a design suite.

How beat sync works

Beat sync is arithmetic. The tool measures BPM, then sets the orbit period so one turn lasts a chosen number of bars:

seconds per turn = (60 / BPM) × beats per bar × bars per turn

At 120 BPM in 4/4, one beat is 0.5 seconds. One bar is 2 seconds, so one orbit per bar is a 2-second turn, two bars is 4 seconds and four bars is 8 seconds.

Detection returns BPM, confidence and the first-beat offset. If confidence is low, type the BPM or turn sync off. How many orbits fit in a bar is a creative choice: the grid makes movement agree with the music, not automatically good.

Beat-matched vs beat-aligned orbit

Beat-matched means the orbit period equals a musical span: one turn per 1, 2, 4 or 8 bars. The movement agrees with the tempo, but the first turn may begin anywhere in the bar. Beat-aligned shifts the phase so the widest sweep — the hard left or right point — lands on the first detected downbeat. Only the starting angle changes.

Alignment matters on a drop or first chorus: the hit arrives at the side of the head instead of mid-sweep. The detector supplies the downbeat; a typed BPM has no detected downbeat, so the offset stays at 0. Alignment is one anchor, not drift correction: a live take that speeds up will drift, and a wrong BPM puts the sweep on the wrong beat.

8D audio for podcasts, voice notes, ASMR and sound effects

Voice mode starts from intelligibility. The default orbit is slower (16–24 seconds per turn), depth is lower (40–60 percent), reverb stays under about 20 percent, bass stays near flat and Center Focus starts at 0.75 with bass mono on.

Consonants sit where reverb and head shadow blur, and a fast orbit can swallow a quiet syllable. A/B against the original: if you must concentrate to follow a sentence, reduce depth then reverb.

Most voice notes are heard on a phone speaker, which sums both channels. The orbit disappears in mono; that is expected. If the centre sounds hollow or phasey, lower width and reverb and check mono correlation.

Do not add 8D to emergency instructions, medical or legal recordings or voicemail menus. Never use it to test a hearing threshold, and publish a plain stereo version. For podcasts and ASMR, −16 LUFS is the practical target. For ASMR and sound effects, keep reverb low so transients stay crisp.

Loudness targets and Render Check

Streaming and broadcast expect different loudness. Choose −14 LUFS for YouTube and Spotify, −16 LUFS for Apple Podcasts and ASMR, −23 LUFS for broadcast, or Off to keep the peak-normalised path.

Measurement follows ITU-R BS.1770-4 integrated loudness with 400 ms blocks and absolute and relative gates at −70 LUFS and −10 LU. True peak uses 4× oversampling. The target gain is applied first, then a true-peak ceiling, default −1.0 dBTP. If they conflict, the ceiling wins and the file lands below target; that is safer than intersample clipping.

Render Check reports duration, peak, true peak, RMS, integrated LUFS and mono correlation. It warns on negative correlation (the channels partially cancel in mono) and on true peak above target. Correlation near +1 is mono, near 0 wide.

Why your 8D audio sounds bad

• You are listening on speakers. Crosstalk mixes the channels before they reach your ears, so the orbit becomes a volume pan. Use headphones; the headphone test confirms channel assignment.
• Mono is enabled. A mono accessibility setting, Bluetooth route or app can sum the render to one channel.
• A spatial upmixer is running. Dolby, DTS, “3D audio” and head-tracked modes re-process the file. Disable them while you evaluate.
• The source is clipped or low bitrate. A 96–128 kbps MP3 or rip already contains pre-echo and distortion, which the orbit makes obvious. Start from WAV or FLAC.
• There is too much bass or reverb. A +6 dB shelf and wet reverb can clip or wash out transients. Reduce them and render again.
• The loudness target is wrong. Match the destination; a hot master is turned down by the platform, and a true peak above the ceiling can distort.
• Mono correlation is negative. A very wide orbit or heavy reverb can cancel in mono; reduce width or reverb.

If you are shortlisting a pair, read headphones for critical listening before you buy.

Privacy, formats and limits

The converter is 100 percent local. Your browser reads, decodes, renders and encodes on your device; no audio, video or file name is sent to a server.

Inputs are MP3, WAV, FLAC, M4A/AAC and OGG/Opus where the browser has a decoder; music videos can be MP4, MOV or WebM. Chrome and Firefox handle most; Safari and older mobiles are limited, so WAV or MP3 is safest. Output is stereo audio or an MP4 with the original picture. MP3 uses LAME through Mediabunny (MPL-2.0; LAME LGPL) and runs locally.

Desktop limits are 50 MB and six minutes; low-memory devices are capped near three minutes. Trim the file or convert a shorter excerpt. DRM-protected files cannot be decoded.

Copyright and fair use

Only convert audio and video you recorded, purchased, licensed or otherwise have permission to use. Converting a song does not grant rights. Personal listening is one thing; publishing on YouTube, TikTok or a podcast is another, because the composition, recording and footage remain copyrighted.

Platforms run content matching and apply their own loudness and encoding. “Fair use” is a legal defence decided case by case, not a feature of the tool. Use a royalty-free track, your own recording or a licence that permits derivatives, and never rip streams.