# Studio Control Host & Remote Access

This page details the management nodes, network topology, SSH agent authentication chain, and operating system configurations for remote studio management.

---

## 1. Remote Access & SSH Socket Topology

All studio infrastructure is accessible securely through the main server, `ul`, via forwarded SSH authentication sockets:

```
+---------------------------------------------------------------------------------+
| Host: ul (ul.drheck.dev)                                                        |
| - Infrastructure Gateway                                                        |
| - Agent Socket Dir: ~/.ssh/agent/                                               |
+---------------------------------------------------------------------------------+
                    |                                             |
                    | SSH                                         | SSH
                    v                                             v
+---------------------------------------+     +-----------------------------------+
| Host: pikvm-studio                    |     | Host: bmo95                       |
| - IP: Static / DHCP Reservation       |     | - 48-Channel FireWire DAW Host    |
| - PiKVM V4 Plus Management            |     | - Linux 6.13 PREEMPT_RT Kernel    |
| - Sub-GHz RF Studio Power Automation  |     | - JACK & ALSA Real-time Audio     |
+---------------------------------------+     +-----------------------------------+
```

---

## 2. `pikvm-studio` Specifications & Filesystem Model

*   **Hardware**: PiKVM V4 Plus (Raspberry Pi 4 Model B, 2GB RAM)
*   **Operating System**: Arch Linux ARM (`aarch64`, Linux 6.12.100-1-rpi)
*   **Attached Peripherals**:
    *   PiKVM V4 Plus capture & ATX power control board
    *   Great Scott Gadgets YARD Stick One (`1d50:605b`, USB Bus 001)

[![pikvm.jpeg](https://wiki.drheck.dev/uploads/images/gallery/2026-08/scaled-1680-/pikvm.jpeg)](https://wiki.drheck.dev/uploads/images/gallery/2026-08/pikvm.jpeg)

### Read-Only Root Filesystem (`ro` / `rw`)

To prevent SD card corruption during sudden power losses, `pikvm-studio` boots with a **read-only root filesystem** (`/` mounted `ro`).

#### Modification Workflow

When installing new utilities, Python libraries, or modifying configuration:

```shell
# 1. Remount root partition as read-write
$ sudo rw

# 2. Make file modifications or package updates
$ sudo cp /tmp/studio-power /usr/local/bin/studio-power
$ sudo chmod +x /usr/local/bin/studio-power

# 3. Remount root partition back to read-only
$ sudo ro
```

Temporary work, logs, and transient scripts can also be written to `/tmp` (tmpfs) without switching to `rw` mode.

---

## 3. `bmo95` Audio Host Specifications

*   **Architecture**: `x86_64`
*   **Kernel**: Linux 6.13.0-rt-preempt
*   **Configuration Repository**: [link](https://git.drheck.dev/luke/audio_config)