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+ +# hathoris + +Simple, open-source, web interface & API for controlling your HiFi amplifier on Linux. + +
+ + + +

Main screen

+ +## About the Project + +Hathoris is a web interface and API for controlling an audio amplifier on Linux. It allows selecting audio sources, whether virtual (web radio, streaming, local or remote sources) or physical (S/PDIF, analog line-in, etc., depending on the hardware). It also provides advanced control over exposed sound card parameters, such as overall volume, stereo balance, and on some hardware, settings like treble, bass, and surround. + + +## Goals and Features + +Hathoris aims to provide a simple and accessible solution for controlling a HiFi amplifier over the network. The key features include: + +- **Easy sharing of HiFi equipment:** Allow multiple users in a household to control an amplifier over WiFi. + +- **Seamless integration:** Restore the simplicity of old HiFi systems while modernizing control. + +- **Support for multiple audio sources:** Handle both physical and virtual sources (S/PDIF input, ). + +- **Sound card/amplifier controls:** Use your browser or the API to remotely change the volume or any other parameters exposed by the sound card. + +- **Integration with multiple application:** Display the current track and/or control the underlying application (like [AirPlay](https://github.com/mikebrady/shairport-sync), [MPRIS2](https://mpris2.readthedocs.io/en/latest/) (Firefox, ...), [mpv](https://github.com/mpv-player/mpv), ...). + +- **Per input volume control:** Thanks to `pulseaudio`, every sink-inputs can be mixed at a given volume. + + +## Setup + +### Prerequisites + +Hathoris is compatible with any Linux distribution that has PulseAudio. It also requires: + +- `alsa-utils` is required to control sound card parameters, and to handle some physical sources. +- `mpv` and `yt-dlp` for managing virtual sources. +- A compatible amplifier or sound card (see the [Compatible Hardware](#compatible-hardware) section). + + +### Quick Installation Guide + +TODO: Add a quick installation guide. + + +### Build the Project + +To build the project: + + +1. Clone the repository: + +``` +git clone https://github.com/nemunaire/hathoris.git +cd hathoris +``` + +2. Build the frontend: + +``` +cd ui +npm install +npm run build +cd .. +``` + +3. Then, build the API (which embed the frontend): + +``` +go build +``` + + +## Configuration and Usage + +### Audio Sources + +- **Physical sources** are automatically detected when implemented in the code. +- **Application sources** like [shairport-sync](https://github.com/mikebrady/shairport-sync), a [pulseaudio/PipeWire tunnel](https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-tunnel-sinksource), [Firefox/Chrome/VLC/... and others MPRIS2 compatible softwares](https://mpris2.readthedocs.io/en/latest/).... +- **Virtual sources** are configured via a JSON file. (A web configuration interface is planned.) + +Here is an JSON with 2 virtual sources: + +```json +{ + "custom_sources": [ + { + "src": "mpv", + "kv": { + "file": "http://stream.syntheticfm.com:8040/stream", + "name": "Radio Synthetic FM" + } + }, + { + "src": "mpv", + "kv": { + "file": "https://youtube.com/channel/UCD-4g5w1h8xQpLaNS_ghU4g", + "name": "NewRetroWave", + "opts": [ + "--shuffle" + ] + } + } + ] +} +``` + +### API + +The web interface talks directly to the REST API, so everything that can be perform in the browser can also be performed with the API. + +The API is not yet documented, but a Swagger specification is planned soon. + + +#### Source Selection + +Here is a basic API call to start listening what's received on the S/PDIF port of the amplifier: + +``` +curl -X POST http://127.0.0.1:8080/api/sources/spdif/enable +``` + +Select a virtual source, as defined earlier: + +``` +curl -X POST http://127.0.0.1:8080/api/sources/mpv-0/enable +``` + +When enabling one source, any other active source is disabled beforehand. + + +#### Volume Control + +You can control the sound card volume (and any other parameter it exposes): + +``` +curl -X POST -d '[108]' http://127.0.0.1:8080/api/mixer/1/values +``` + +`1` corresponds to the ALSA `NumID`, given by `/api/mixer`: + +``` +curl http://127.0.0.1:8080/api/mixer' +[ + { + "NumID": 1, + "Name": "Digital Playback Volume", + "Type": "INTEGER", + "RW": true, + "Min": 0, + "Max": 207, + "DBScale": { + "Min": -103.5, + "Step": 0.5, + "Mute": 1 + }, + "values": [ + 144, + 144 + ] + }, + { + "NumID": 2, + "Name": "Analogue Playback Volume", + "Type": "INTEGER", + "RW": true, + "Min": 0, + "Max": 1, + "DBScale": { + "Min": -6, + "Step": 6 + }, + "values": [ + 1, + 1 + ] + }, + { + "NumID": 3, + "Name": "Analogue Playback Boost Volume", + "Type": "INTEGER", + "RW": true, + "Min": 0, + "Max": 1, + "DBScale": { + "Min": 0, + "Step": 0.8 + }, + "values": [ + 1, + 1 + ] + }, + { + "NumID": 4, + "Name": "Digital Playback Switch", + "Type": "BOOLEAN", + "RW": true, + "Min": 0, + "Max": 0, + "values": [ + true, + true + ] + }, + { + "NumID": 5, + "Name": "Deemphasis Switch", + "Type": "BOOLEAN", + "RW": true, + "Min": 0, + "Max": 0, + "values": [ + true + ] + }, + { + "NumID": 6, + "Name": "DSP Program", + "Type": "ENUMERATED", + "RW": true, + "Min": 0, + "Max": 0, + "values": [ + 0 + ], + "items": [ + "FIR interpolation with de-emphasis", + "Low latency IIR with de-emphasis", + "High attenuation with de-emphasis", + "Fixed process flow", + "Ringing-less low latency FIR" + ] + } +] +``` + + +## Compatible Hardware + +Hathoris has been tested on several hardware configurations, including: + +- [Voltastream AMP1](https://polyvection.com/news/flashback-how-voltastream-paved-our-way/) +- [Voltastream Zero](https://polyvection.com/news/flashback-how-voltastream-paved-our-way/) +- [Raspberry Pi with DigiAMP+](https://www.raspberrypi.com/products/digiamp-plus/) + +Additional compatible hardware may be added in the future (don't hesitate to contribute). + + +## Stack Tech + +- [![Go][Go-badge]][Go-url] - A statically typed, concurrent, and garbage collected language + +[Go-badge]: https://img.shields.io/badge/Go-00ADD8?style=for-the-badge&logo=go +[Go-url]: https://go.dev/ +- [![Svelte][Svelte-badge]][Svelte-url] - A high-performance reactive JavaScript UI library + +[Svelte-badge]: https://img.shields.io/badge/Svelte-FF3E00?style=for-the-badge&logo=svelte +[Svelte-url]: https://svelte.dev/ + + +## License and Contributions + +This project is licensed under the [GNU Affero General Public License 3.0](https://www.gnu.org/licenses/agpl-3.0.html). + +Contributions are welcome! The goal is to keep the project simple, efficient, and compatible with as much Linux hardware as possible. diff --git a/assets/mainscreen.png b/assets/mainscreen.png new file mode 100644 index 0000000..1d21e81 Binary files /dev/null and b/assets/mainscreen.png differ