Shape the file.
Keep the original.

Your classic FM voices, clearly editable.

Import a DX7-format single voice or 32-voice bank. Validate framing, parameter ranges and checksum. Edit operator rates, levels, frequency and keyboard scaling; tune voice-wide pitch, LFO and algorithm values. See exact original-to-edited differences and save named voice versions.

Files you can use.

Export a checked single voice and full 32-slot bank, untouched original, restorable JSON, all-bank changes CSV and a four-page voice sheet. Both SysEx outputs are parsed again and checked against every edited value. Native sharing sends the files to your chosen app or Files location.

Scope

This is a file editor, with no sound preview or MIDI transmission. It does not model algorithm routing, envelope seconds or hardware behavior. Curves show level stages schematically. Only classic VCED/VMEM voice data is supported; no ACED/performance, 4-op, compressed or concatenated files. No instrument tests or universal compatibility guarantee are claimed.

Library starts empty; an initialized bank and optional original parameter study provide starting points. 24 saved banks and 64 voice versions per bank. JSON restore under 2 MB. See support and exact file limits.