{"package_name":"net.opendsp.x4x4","name":"openDSP-4x4","summary":"Open control for the t.racks DSP 4x4 Mini Pro over USB-OTG.","category":"Connectivity","icon_url":"/api/icon/net.opendsp.x4x4","latest_version_code":6,"latest_version_name":"0.2.2","apk_url":"/api/apk/net.opendsp.x4x4","apk_size":1683351,"apk_sha256":"7a6b5f09519db1551fa6257001dcca5b87afc54d06347e0d01ad4b66987084f7","source_kind":"fdroid-repo","repo_slug":"fdroid-main","last_updated":1782302418,"release_timestamp":1782294399,"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.\n\nThe 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.\n\nFeatures:\n\n* Input/output routing matrix.\n* Gain, mute and polarity per channel.\n* 7-band parametric EQ with high- and low-pass crossovers.\n* Compressor, gate and output delay.\n* Preset recall and store (7 device slots) as quick launch pads.\n* Live input/output meters and full device-state read-back on connect.\n\nPrivacy:\n\n* No analytics, no telemetry, no network connections — the app talks only to the DSP over USB.\n\nPlug 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.\n\nIndependent, clean-room interoperability project. \"the t.racks\" is a trademark of Thomann; this app is not affiliated with or endorsed by Thomann.\n","categories":["Connectivity","Multimedia"]}