Kizami 刻み

A Rust audio recorder that stamps recordings with SMPTE timecode and publishes proof of when they happened as Nostr events.

刻み means "a notch, a tick, to engrave" — every frame of audio gets its notch in time, and that notch gets written somewhere nobody can quietly edit.

How it works

Tentacle Sync (BLE / LTC) ──► shokushu ──► Kizami ──► Nostr event ──► wss://hasky.chat
                                            │
                                            └── audio recording, timecode-stamped

• Timecode comes from a Tentacle Sync over BLE, read via jb55's shokushu crate.
• Kizami records audio, tags it with the running timecode, and publishes a signed note describing the recording to a Nostr relay.
• Anyone can later verify the note's signature and timestamp against the audio.

The hardware side — a cycle-exact timecode core on an open FPGA — lives in kizami-core.

Status

Early. Working today:

• BLE scanning for Tentacle Sync devices
• Publishing a Kizami note to wss://hasky.chat
• Audio recording wired to timecode
• Hash of the audio inside the note
• kizami-core over UART as a timecode source

Build

git clone git@github.com:hasky00/kizami.git
cd kizami
cargo build --release

Set a permanent identity for the notes (otherwise a throwaway key is used):

export KIZAMI_NSEC=nsec1...
cargo run

Requires Rust stable and Bluetooth on the host (tested on macOS).

Stack

Rust · shokushu · nostr-sdk · tokio

License

MIT