AAC family
AAC-LC (mono or stereo) plus stereo HE-AAC v1 (SBR) and HE-AAC v2 (SBR+PS) — as ADTS .aac or MPEG-4 .m4a. LC uses native WebCodecs with an fdk-aac (WASM) fallback; HE-AAC runs on fdk-aac (WASM).
Client-side audio · Browser, PWA & Android · No upload farm
Live in browser Android on Google Play
chainDRiVE
Effects-first transcoder with a real signal chain — not another Play Store junk converter.
Drop a folder of audio, dial LUFS and radio simulation, pick a codec like you mean it (AAC-LC / HE-AAC, LAME MP3, MP2, FLAC, Opus, Ogg Vorbis, broadcast BWF / RF64, console ADPCM like PlayStation and Nintendo, telephony G.722 / G.726, and more), then batch-export a ZIP — entirely on your device, in the browser or the Android app. UI in 20 languages.
Free in the browser and on Android (the Android app is supported by ads). No upload — your audio stays on your device.
Converters flood the store. Engineers starve.
Most “audio converter” apps are format laundry: one slider, muddy defaults, and zero respect for loudness, psychoacoustics, or batch workflow.
What junk converters do
Ship A→B and call it done
- Hide codec profiles behind “High / Medium / Low”
- Re-encode everything through a mystery pipeline
- Crumble on folders — or charge for “batch unlock”
- Phone-home uploads dressed up as “cloud convert”
What chainDRiVE does
Treat conversion as the last stage
- Visible signal chain — LUFS → FX → brick-wall → encode
- Real codec knobs — HE-AAC profiles, LAME psycho sets, Opus apps
- Strong batch — queue many files → one
(cDRV batch).zip - On-device — OfflineAudioContext + workers; your media stays local
Inside the workbench
Media queue, effects (including the Crystallizer), output format menu, import options, archive browser, ROM sample scanner, chain map, CHAiNAMP preview, job log, batch ZIP — swipe the rail.
The chain, not the black box
Every stage is intentional. Loudness first, creative FX in the middle, encode last.
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1
Decode → trim → rate
Load common formats (MP3, M4A/AAC/MP4, FLAC, WAV, Opus/Ogg, WebM, AMR, AIFF…) and the specialty ones too (BWF, RF64, Wave64, CAF, VOC, 8SVX, MP1/MP2, Monkey's Audio, Musepack, WavPack, TTA, ALAC, Speex, DSD, WMA, RealAudio, DTS, ATRAC, tracker modules, MIDI/OPL, PlayStation, Nintendo, ADX, G.722/G.726, raw PCM). Resample and channel-map before any FX.
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2
LUFS normalize
K-weighted integrated loudness with a target you set (broadcast-style −24…−6 LUFS range) and peak safety — not a dumb “normalize to 0 dBFS.”
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3
Reorderable FX
Compressor, Signal Strength makeup, AM/FM radio simulator (hum, multipath, sferics, pilot…), Ear Protect shelf — drag the order, persist it. The Crystallizer is a spectral band replication (SBR) effect that rebuilds a natural top end above where narrow-band voice recordings cut off. It is off by default, with controls for level, tilt, cutoff (auto or manual) and more.
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4
Brick-wall → encode → ZIP
Limiter closes the chain, then the encoder you actually chose. Multi-file jobs land in one
(cDRV batch).zip.
Formats: from MP3 to PlayStation
Encoded and decoded on your device — in the browser or the Android app. Every output can be previewed in the built-in player before you save it, and the specialty formats below can be loaded as inputs too.
Mainstream lossy
Perceptual codecs for music and everyday sharing.
Lossless & PCM
Bit-exact when you do not want to throw anything away.
Broadcast & containers
Studio, archive and legacy wrappers.
MPEG Layer I & II
The broadcast workhorses, as .mp1 / .mp2 or inside WAV / BWF.
Lossless & legacy
The audiophile and archive codecs, read and written on your device.
AC-3 & ATRAC
Export AC-3 and E-AC-3 surround-era codecs plus the MiniDisc-era ATRAC family.
More formats you can open
Import-only: decoded on your device, then converted to anything above.
Tracker & DOS music
Sequenced music, rendered to audio so you can process and export it.
Retro game audio & ROM samples
Export classic PC and console game audio formats.
Game archives & ROM tools
Open an archive, pick a sound. Everything stays on your device. The archive browser lists the audio entries (filter, preview, select) and adds the ones you pick to the queue. The ROM sample scanner searches a cartridge image for sample data you can audition and add the same way.
PlayStation & game ADPCM
4-bit ADPCM from consoles and arcades.
Voice & telephony
Low-bitrate speech codecs. G.726 is 8 kHz mono, G.722 is 16 kHz mono, OKI VOX is 8 kHz.
Formats that rely on a platform encoder (AAC via WebCodecs, AMR) appear only when your device can actually produce them; the software-implemented formats work everywhere. Curious how they work? Read The Wonderful World of Audio Codecs.
Codec depth that belongs in a lab
If the UI only offers “High quality MP3,” it is not a transcoder — it is a toy.
MP3 via LAME
CBR/VBR, HQ toggle, and six psychoacoustic/stereo profiles (LAME Default, FHG Narrow, Music, Speech, Wide Stereo, MS Joint Only), with adjustable stereo width and Force-MS joint stereo — knobs for people who hear the difference.
Lossless
FLAC, AIFF, AU/SND (Sun Audio), and WAV PCM in 16- or 24-bit integer and 32-bit float — bit-exact when you do not want to throw anything away.
Opus, Ogg & WebM
Opus (.opus) with Audio / VoIP / Low-Delay application modes and complexity 0–10, plus Ogg Vorbis and WebM (Opus) for the open-web stack.
Voice & telephony
AMR-NB (8 kHz) and AMR-WB (16 kHz), WAV IMA & Microsoft ADPCM, G.711 A-law / μ-law, and GSM 6.10 — the low-bitrate and legacy codecs most converters skip.
Rates & channels
Sample rates from 8 kHz telephony up through 48 kHz; mono, stereo, or joint stereo where the codec allows; size estimates before you commit.
Capability probing
Formats appear when the device can actually encode them — no fake “Supported” badges for codecs the browser cannot ship.
Privacy by architecture
CSP locks the app to itself. Processing uses local OfflineAudioContext and workers — your stems are not a SaaS upload.
Radio simulation, straight from the Dialer's Lab
Terrestrial AM/FM character printed to a file — the Dialer's Lab radio-chain work, rendered offline. Pick Off, AM, or FM, dial Signal Strength, and toggle each artifact on or off.
AM character
Eight switchable artifacts: mains hum, power-line buzz, background hiss, heterodyne whistle, crackle & pops, static crashes (sferics), selective fading, and carrier flutter.
FM character
Eight switchable artifacts: background hiss, multipath dips, crackle & rasp, power-tool RFI, stereo separation, ceiling whistle, stereo pilot tone, and program flutter.
Field note: Faking AM & FM in Web Audio.
Batch that respects operators
Queue a folder, set one chain + one encode profile, run once — get a ZIP, not twelve mystery downloads.
Multi-file queue
Drag-drop, select, process all. Same loudness and FX recipe across the set.
Cancelable jobs
Terminal-style process log so you can see decode → LUFS → FX → encode, and abort mid-run.
One ZIP out
(cDRV batch).zip packaging for the whole run — built for people who convert libraries, not single clips.
Where it's live
Browser, installable PWA and Android — same studio as Global Chaos CB Radio and KAOS-FM.
Desktop & mobile browser
Full workbench on desktop, phone-first chrome on mobile, installable as a PWA. No account, nothing uploaded.
Android on Google Play
The same engine in an app, supported by ads. Big batches keep running with a foreground-service progress notification, so converting a folder does not stall when you switch apps.
Speaks your language
The interface ships in 20 languages: Arabic, Chinese, Dutch, English, Filipino, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Thai, Turkish, Ukrainian and Vietnamese.
From Dialer's Lab
Codec depth, honest convert, and where CHAiNAMP is headed.
Try it now
Free, on-device, no signup — open it in your browser or get the Android app, and drop in a file.