4.8
nastro
Terminal call recorder for macOS that captures system audio and mic (no bot joins the call) and transcribes on-device with speaker diarization, via TUI ...
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Overview
nastro is an advanced, high-performance desktop application engineered for seamless native performance, local-first data processing, and refined user experience.
nastro is built on open-source principles to guarantee security, privacy, and full reproducibility. All sensitive data transformations run locally on your hardware with zero telemetry or unexpected cloud dependencies.
Key Technical Features & Capabilities
No bot in the call. Capture happens at the OS level. Nothing joins your meeting, nothing is visible to other participants.: Streamlined desktop functionality optimized for macOS and Windows.
No cloud. Audio and transcripts never leave your machine. Transcription runs locally (whisper.cpp or WhisperX).: Streamlined desktop functionality optimized for macOS and Windows.
**Who said what, one flag away. Set
transcriber = "whisperx" for diarized output**: [SPEAKER_00], [SPEAKER_01] — grouped by speaking turn, with SRT timestamps.Never lose a call. Audio is written incrementally: the file is valid even after a crash or
kill -9. Transcripts are written atomically: an interrupted run never destroys an existing one. Deletes go to the Trash.Terminal-native. A fast single-binary TUI that inherits your terminal theme, with a headless CLI twin for scripting. Paths are OSC 8 hyperlinks — cmd+click opens Finder.: Streamlined desktop functionality optimized for macOS and Windows.
Architecture & Technology Stack
Primary Languages: Swift
Frameworks & UI Runtime: SwiftUI / AppKit
Build Systems & Tooling: Xcode / Node.js / Cargo
Supported Platforms: macOS 12.0+ (Apple Silicon M1-M4 & Intel x86_64), Windows 10/11 x64, Linux
System Requirements
| Specification | Minimum Requirement | Recommended Specification |
|---|---|---|
| Operating System | macOS 12.0 Monterey / Windows 10 x64 | macOS 14.0+ Sonoma / Windows 11 x64 |
| Processor Architecture | Apple Silicon (M1+) or Intel Core i5 x64 | Apple Silicon Unified Memory (M2/M3/M4) |
| Memory (RAM) | 4 GB Unified RAM | 8 GB+ High-Speed RAM |
| Storage Space | 300 MB available local disk space | 1 GB+ SSD storage |
| GPU Acceleration | Metal 2 / DirectX 12 compatible | Apple Neural Engine / Vulkan capable |
Installation & Setup Guide
macOS Installation (Recommended)
1
Download the verified
.dmg release installer directly from CookApps.2
Open the disk image and drag nastro.app into your
/Applications folder.3
Launch nastro via Spotlight (
Cmd + Space) or Launchpad.Alternatively, install using Homebrew if available:
bash
brew install scaccogatto/tap/nastro
Windows Installation
1
Download the official installer package (
.exe / .msi).2
Run the executable and follow the setup wizard.
3
Launch nastro from the Start Menu or desktop shortcut.
Building from Source (Development Setup)
bash
git clone https://github.com/scaccogatto/nastro.git cd nastro pnpm install || cargo build --release pnpm run build
How to Use & Workflow
1
Application Launch & Workspace: Open nastro to load the responsive native workspace.
2
Configuration & Preferences: Press
Cmd + , (macOS) or Ctrl + , (Windows) to configure hardware acceleration, custom directories, and display themes.3
Primary Operation: Drag-and-drop source files or input parameters directly into the central window.
4
Execution & Export: Initiate the processing pipeline and verify output files saved directly to your chosen local directory.
Troubleshooting & Common Issues
Problem: macOS Gatekeeper displays *"App is damaged and can't be opened"* or unnotarized developer notice.
Root Cause: macOS quarantine flag set on binaries downloaded outside the Mac App Store.
Resolution: Open Terminal and run:
bash
xattr -cr /Applications/nastro.app
Alternatively, navigate to System Settings > Privacy & Security and select Open Anyway.
Problem: High memory consumption during batch processing operations.
Root Cause: Large media buffers retaining uncompressed state.
Resolution: Adjust batch concurrency in settings or process assets in focused batches.
How to Use & Getting Started
## Installation & Setup Guide
### macOS Installation (Recommended)
1. Download the verified `.dmg` release installer directly from CookApps.
2. Open the disk image and drag **nastro.app** into your `/Applications` folder.
3. Launch nastro via Spotlight (`Cmd + Space`) or Launchpad.
Alternatively, install using Homebrew if available:
```bash
brew install scaccogatto/tap/nastro
```
### Windows Installation
1. Download the official installer package (`.exe` / `.msi`).
2. Run the executable and follow the setup wizard.
3. Launch **nastro** from the Start Menu or desktop shortcut.
### Building from Source (Development Setup)
```bash
git clone https://github.com/scaccogatto/nastro.git
cd nastro
pnpm install || cargo build --release
pnpm run build
```
Ready to run nastro?
100% Free & Open-Source native desktop software. Star the repository to support development.
