openDSP-4x4

about

description

openDSP-4x4 is an open-source control app for the t.racks DSP 4x4 Mini Pro, a 4-in / 4-out XLR digital signal processor that otherwise ships with Windows-only editor software. It lets you set the DSP up from an Android phone or tablet — at the desk or on stage — connected over USB-OTG. The control protocol was reverse-engineered clean-room, purely by observing the device's USB-HID traffic and probing it (write a known value, read it back, match the bytes). The same protocol drives a zero-install desktop web app (WebHID) and this Android build. On Android the UI runs in a WebView and reaches the device through a small native USB-host layer, because no Android browser can talk to a HID device. Features: * Input/output routing matrix. * Gain, mute and polarity per channel. * 7-band parametric EQ with high- and low-pass crossovers. * Compressor, gate and output delay. * Preset recall and store (7 device slots) as quick launch pads. * Live input/output meters and full device-state read-back on connect. Privacy: * No analytics, no telemetry, no network connections — the app talks only to the DSP over USB. Plug the DSP into the phone with a data-capable USB-OTG cable, tap Connect, grant the USB permission, and the app reads the device's current state and is ready to edit. Independent, clean-room interoperability project. "the t.racks" is a trademark of Thomann; this app is not affiliated with or endorsed by Thomann.

publisher

78ce6faa72264387284e647ba6938995735ec8c7d5c5a65737e55130f026307d

first seen

2026-10-08T21:25:40.595115+00:00

last event

2026-06-17 22:06 UTC

install

zapstore.dev or any Zapstore-compatible client

source & build

repository

https://github.com/glassontin/opendsp-4x4

arch flags

android-arm64-v8a

manifest

missing

releases (kind 30063)

1 release indexed; latest 0.2.2.

assets & verification

Every app, release and asset event is schnorr-verified (NIP-01 id + signature) before it enters the catalog, and assets are content-addressed by sha256. We subscribe read-only to the catalog relay — never write to it.

0.2.2 — opendsp-4x4-0.2.2.apk

sha256

7a6b5f09519db1551fa6257001dcca5b87afc54d06347e0d01ad4b66987084f7

size

1.6 MB

archs

android-arm64-v8a

version code

6

apk cert sha256

12b4463c8a6a356c64a743ed912a047b05a210f113829de15c71b748e63fe2a1

download

opendsp-4x4-0.2.2.apk

Showing the newest 1 asset descriptor; the full set is in /api/apps/78ce6faa…