AI summary
Rootless system-wide audio processor with ViPER4Android effects, parametric EQ, presets, and a reorderable DSP chain. Version 4.5.0 adds spectral shaping, binaural upmix, headphone Match EQ, and experimental global mode.
Generated by AI. May contain inaccuracies.
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About this app
RootlessViPER4Android (RootlessJamesDSP — ViPER4Android Edition) is a system-wide Android equalizer and audio effects app that brings the beloved ViPER4Android (V4A) sound experience to non-rooted phones. It combines the powerful open-source JamesDSP engine with native re-implementations of ViPER's classic effects — Dynamic System, ViPER Bass, ViPER Clarity, Spectrum Extension, Field Surround, Tube Simulator (6N1J) and many more — all running without root, without Magisk, and without custom ROMs.
Beyond the ViPER suite, it adds a fully reorderable DSP chain, so you decide the order every effect runs in, with the output limiter always kept last. An interactive parametric equalizer lets you drag bands directly on the response curve, add or remove them with a long press, and fine-tune frequency, Q and gain on rotary controls with full undo. A studio-grade echo/delay offers mono, stereo and ping-pong modes with a filtered feedback path, sample-rate and bit-depth crushing, tape-style modulation, diffusion and feedback distortion — all laid out on a knob panel that reflows to fit any screen. Up to four Liveprog (EEL2) scripts can be chained together and picked in one multi-select pass, and 446 official ViPER DDC profiles are bundled and ready to load.
The interface is yours to arrange: reorder, hide and group the effect cards, search across every effect, and save the whole setup — including your layout and chain order — into portable presets. Effect cards load as you scroll so the app opens instantly, and large effect buffers are allocated only while an effect is switched on, keeping memory use modest even with many apps playing audio. Processing also stands down on its own once playback goes quiet, so nothing is spent grinding through silence while your music is paused.
The Reverberation effect offers four rooms — the classic ViPER model plus a smooth studio Plate, a large warm Concert hall, and a natural Room with early reflections — and the output stage adds a ViPER classic limiter, a faithful re-creation of the original V4A limiter with the lookahead and transient bite that made it distinctive. The convolver and DDC libraries have their own search, custom sorting, hiding and groups, and can pull fresh impulse responses and DDC profiles straight from public repositories, skipping anything you already own.
Prefer the original experience? ViPER4Android-only mode narrows the app to the effects V4A shipped, using its naming, its processing order and its limiter, and switches everything else off so it costs nothing. A matching ViPER4Android classic theme is available on its own too, if you want the classic look without giving up any of the extras.
What's new
- Android Auto
- With processing on, Android Auto used to lose the sound to the phone speaker. Processed audio now plays as music, so it stays in the car (tested on wired Android Auto). If some other output sends sound to the wrong place since updating, Play processed audio as an unknown type in Settings, Troubleshooting brings back the old behaviour. From #19.
- Spectral shaper
- A new card that finds frequencies suddenly sticking out of their surroundings, like a harsh cymbal or a sharp peak in bright IEMs, and turns them down only while they do. Clean steady notes are left alone, and Listen to what is removed plays only what it takes away. Adds about 21 ms of delay.
- Binaural upmix
- Places ordinary stereo around you on headphones: the room sound of the recording goes to the sides, behind you and a little above, the main sound stays in front, and a mono centre stays exactly in the centre. It uses a measured dummy head (MIT KEMAR) out of the box, or a SOFA file of your own. Width, Surround, Height and Room sliders, and it switches itself off on the phone speaker. Headphones only. From #8.
- Match EQ
- Pick your headphones from the AutoEQ database or load a measurement, pick a target sound, and the graphic EQ gets the curve that takes one to the other. Bass, treble and tilt adjustments, limits on boost and cut, and nothing is downloaded until you pick it.
- Global mode (experimental)
- In Settings, Global mode changes the sound with Android's own built-in effect instead of recording it. No recording prompt, and apps that block recording, such as Spotify, work too. Only the EQs, Bass boost, FET compressor, Maximizer, Output control and Balance carry over; the other cards are greyed out while it is on. It depends on the phone, and a check screen shows what Android did with it.
- Also new
- Signalsmith Stretch as a pitch shifter method, high quality and light on the battery. From #18. The convolver's help now explains the six Advanced waveform editing values. From #20. Download more... in the convolver and DDC libraries can search GitHub for new sources, and shows sizes before anything is downloaded. The layout editor scrolls when you drag a card to the top or bottom edge, and whole groups can be folded with one tap. The app now tells you when a new version is out, shows what changed, and can download and install it for you. You can turn this off in Settings, Misc.
- Fixes
- One broken sample from a player, or one odd setting, could silence most effects until they were switched off and on. The engine now shrugs these off. Silence could cost many times the CPU of music on x86 devices. The Processing order screen showed an order the engine never used, and saving it moved the maximizer in front of six effects. Vinyl and Balance were missing from it. New effects added by an update now appear next to their neighbours in your own layout, and Restore the default effect order works straight away. The pitch shifter could crash in formant mode when it was sent a broken setting. About now points to this project rather than the original one.
- Rooted mode
- The engine module is attached as RootfulViPER4Android-engine-module-v4.5.0.zip. Update it together with the rooted app, then reboot. The rooted app now tells an outdated module apart from a missing one. Phones on Android 15 or newer that use the AIDL audio effects HAL still cannot load the module (#12).
- Which file do I want?
- rootless is the normal one. No root needed. rootful is the rooted build, to be installed with the module above. Upgrading from 4.4.0 installs straight over the top.
About this version
- Version
- 4.5.0 (129)
- Size
- 48 MB
- Requires Android
- 10
- Target SDK
- 29
- Architecture
- arm64-v8a, armeabi-v7a, x86, x86_64
- Downloads
- 57
- Updated
- Nov 8, 2026
- Package
- com.alienware377.viper4android.rootless
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