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<p class="whitespace-pre-wrap break-words">A Raspberry Pi 3 is a great choice for building a USB MIDI host. Here's how to set it up:</p>
<h2 class="text-xl font-bold text-text-100 mt-1 -mb-0.5">Hardware Setup</h2>
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<li class="whitespace-normal break-words">Raspberry Pi 3</li>
<li class="whitespace-normal break-words">MicroSD card (at least 8GB)</li>
<li class="whitespace-normal break-words">Power supply (2.5A recommended)</li>
<li class="whitespace-normal break-words">Case (optional but recommended)</li>
<li class="whitespace-normal break-words">USB hub (if you need more than 4 USB connections)</li>
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<h2 class="text-xl font-bold text-text-100 mt-1 -mb-0.5">Software Installation</h2>
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<li class="whitespace-normal break-words">Flash Raspberry Pi OS Lite to your SD card (lighter OS since we don't need a GUI)</li>
<li class="whitespace-normal break-words">Boot up the Pi and complete initial setup</li>
<li class="whitespace-normal break-words">Update the system:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>sudo apt update
sudo apt upgrade</code></pre>
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<li class="whitespace-normal break-words">Install required packages:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>sudo apt install alsa-utils amidiauto</code></pre>
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<h2 class="text-xl font-bold text-text-100 mt-1 -mb-0.5">MIDI Host Configuration</h2>
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<li class="whitespace-normal break-words">Install the ALSA MIDI utilities:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>sudo apt install alsa-utils</code></pre>
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<li class="whitespace-normal break-words">Install amidiauto for automatic MIDI connections:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>sudo apt install amidiauto
sudo systemctl enable amidiauto
sudo systemctl start amidiauto</code></pre>
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<li class="whitespace-normal break-words">Create a custom udev rule for your MIDI devices:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>sudo nano /etc/udev/rules.d/99-midi.rules</code></pre>
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Add:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>SUBSYSTEM=="usb", ACTION=="add", ATTRS{idVendor}=="xxxx", ATTRS{idProduct}=="yyyy", RUN+="/usr/local/bin/midi-connect.sh"</code></pre>
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(Replace xxxx/yyyy with your device IDs, which you can find using <code class="bg-text-200/5 border border-0.5 border-border-300 text-danger-000 whitespace-pre-wrap rounded-[0.4rem] px-1 py-px text-[0.9rem]">lsusb</code>)</li>
<li class="whitespace-normal break-words">Create the connection script:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>sudo nano /usr/local/bin/midi-connect.sh</code></pre>
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Add basic connection logic (this is a simplified example):
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<div class="text-text-500 text-xs p-3.5 pb-0">bash</div>
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code class="language-bash"><span class="token shebang">#!/bin/bash</span>
<span class="token">sleep</span> <span class="token">2</span>
aconnect -l
aconnect <span class="token">20</span>:0 <span class="token">128</span>:0  <span class="token"># Connect device to device (IDs will vary)</span></code></pre>
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<li class="whitespace-normal break-words">Make the script executable:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>sudo chmod +x /usr/local/bin/midi-connect.sh</code></pre>
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<h2 class="text-xl font-bold text-text-100 mt-1 -mb-0.5">Advanced Setup (Optional)</h2>
<p class="whitespace-pre-wrap break-words">To make it more user-friendly, you could:</p>
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<li class="whitespace-normal break-words">Install web-based MIDI routing with Node.js:
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<pre class="code-block__code !my-0 !rounded-lg !text-sm !leading-relaxed"><code>curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -
sudo apt install nodejs</code></pre>
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<li class="whitespace-normal break-words">Create a simple web interface to control connections using a framework like Express</li>
<li class="whitespace-normal break-words">Set up headless boot and WiFi for remote access</li>
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