149 lines
5.1 KiB
Markdown
149 lines
5.1 KiB
Markdown
# dgm20-linux
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Control the **Maono DGM20** USB microphone on Linux. Maono Link only runs on Windows and macOS;
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this covers the same settings with a local web page and a command-line tool.
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- Noise cancellation on/off and strength
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- Vocal enhancement
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- Hear yourself (headphone monitoring)
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- Mute, kept in sync with the mic's touch pad
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- RGB ring brightness
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- Factory reset
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Pure Python, no dependencies. Nothing leaves your machine: the page is served from your own
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computer and loads no external fonts or scripts.
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> Unofficial. Not affiliated with or endorsed by Maono.
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## Supported hardware
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| Model | USB ID | Status |
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|-------|--------|--------|
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| DGM20 | `352f:0105` | Supported, tested on firmware 2.1.2 |
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| DGM20 (newer revision) | `352f:0112` | Not yet |
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| DGM20G, DGM20W | `352f:0113`, `352f:041a`-`041d` | Not yet |
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Find your mic's ID with `lsusb | grep -i maono`. If you have one of the unsupported models and want
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to help, open an issue with that output.
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## Install
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You need Python 3.9 or newer with `venv` (Debian and Ubuntu: `sudo apt install python3-venv`).
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```sh
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git clone https://git.reiners.io/ReinersCloudConsulting/dgm20-linux.git
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cd dgm20-linux
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./install.sh
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```
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Then unplug the mic and plug it back in once.
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The installer:
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1. puts the program in its own virtualenv under `~/.local/share/dgm20-linux`, with the commands
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`dgm20ctl` and `dgm20-web` linked into `~/.local/bin`, and
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2. asks for sudo once to add a udev rule (`/etc/udev/rules.d/70-maono-dgm20.rules`) that lets you
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use the mic's control channel without root.
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Run it as your normal user, not with sudo.
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### Options
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| Option | What it does |
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|--------|--------------|
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| `--service` | Runs the control page in the background now and every time you log in (systemd user service). |
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| `--lan` | Lets other devices on your network open the page too. Opens the port in firewalld or ufw for your local subnet only. Implies `--service`. |
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| `--port N` | Uses a different port (default 8720). |
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| `--group NAME` | Group allowed to use the mic from ssh sessions. Default: the first of `plugdev`, `wheel`, `sudo` that you belong to. Desktop logins always have access. |
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| `--no-udev` | Skips the udev rule. |
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| `--dry-run` | Prints every change instead of making it. |
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`--lan` has no login. Anyone on your network can change your mic settings, so only use it on a
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network you trust. If you run a firewall other than firewalld or ufw, the installer tells you what
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to allow.
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### Uninstall
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```sh
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./uninstall.sh
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```
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This removes everything the installer added: the service, firewall rule, udev rule and program
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files. The installer keeps a record of what it changed, so only those changes are undone. Your mic
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keeps its current settings.
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## Use
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```sh
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dgm20-web --open # open the control page (http://localhost:8720)
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dgm20ctl # show current settings
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dgm20ctl set nc on nc-level 80
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dgm20ctl set monitor off enhance on brightness 40
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dgm20ctl watch # print changes made on the mic itself
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dgm20ctl info # model and firmware
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dgm20ctl factory-reset --yes
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```
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| Setting | Values |
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|---------|--------|
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| `mute` | on, off |
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| `nc` | on, off: noise cancellation |
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| `nc-level` | 0-100: noise cancellation strength |
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| `enhance` | on, off: vocal enhancement |
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| `monitor` | on, off: hear yourself in headphones plugged into the mic |
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| `brightness` | 0-100: RGB ring |
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Settings are stored on the mic, so they stay the same after a replug and on other computers.
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Input gain and headphone volume are standard USB audio controls. Set them in your desktop's sound
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settings, `pavucontrol` or `alsamixer`.
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### Using the page from another computer without opening a port
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If the mic is plugged into a machine you reach over ssh, forward the port instead of using `--lan`:
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```sh
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ssh -L 8720:localhost:8720 that-machine
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```
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Then open http://localhost:8720 on your own computer.
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## Troubleshooting
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**"no permission to open /dev/hidrawN"**: the udev rule isn't applied yet. Unplug and replug the
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mic. Over ssh, make sure you're in the group the installer printed (`id -nG`). If you were just
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added to that group, log in again.
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**"DGM20 (352f:0105) not found"**: check `lsusb | grep -i maono`. A different USB ID means a
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model that isn't supported yet (see above).
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**The page says "Mic not found"**: plug the mic in. The page reconnects by itself.
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**`dgm20-web: cannot listen on 127.0.0.1:8720`**: it's already running, for example as the
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service. Open http://localhost:8720, or pick another port with `--port`.
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**Commands not found after installing**: `~/.local/bin` isn't on your `PATH`. Add
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`export PATH="$HOME/.local/bin:$PATH"` to your shell profile.
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**Service stops when you log out**: run `sudo loginctl enable-linger $USER`.
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## How it works
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The mic has a vendor HID channel next to its audio interfaces. The settings were found by reading
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Maono Link's DGM20 plugin and then checked against a real mic. [PROTOCOL.md](PROTOCOL.md) documents
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the packet format and register map. `dgm20ctl raw get|set|dump` gives direct register access for
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exploring.
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## Development
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```sh
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PYTHONPATH=src python3 -m unittest discover -s tests
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PYTHONPATH=src python3 -m dgm20.web
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```
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## License
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MIT
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