At CTA stations, the end of the track should be terminated with a pressure plate to trigger note blocks. Here's how you do it:
Step 1: Prepare tracks
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| Starting tracks |
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| Break 2 sections of track. Place a stone pressure plate on the first empty block, and another block (any type) on the second empty block. |
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| Directly underneath the block containing the stone pressure plate, place redstone dust (for both tracks). This marks where your pressure plate is once you dig the room under the tracks. |
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Step 2: Dig bell room
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| Dig down 3 blocks, so the roof is the same level as the tracks. The block containing the redstone should be 2 blocks above the floor of the room. |
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| Dig out a room that contains both of the redstone "towers", and make it large enough (at least 10x20 blocks) |
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Step 3: Lay redstone
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| Connect the two pieces of redstone into a single wire. |
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| Create a fork partway through the wire, and fork it out to two pieces of wool. The wool is important, as it will make a bell noise. The redstone must be directed at the wool, otherwise, the bell will not work. |
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| Do the same on the other side, except make the wool at least 5 blocks away from the wire. A delay circuit will go here, and it needs a little bit more room. |
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| Place 2 blocks halfway in the wire you just made. Ideally, to get the most delay, the two blocks should be facing north-south. |
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| Place redstone torches as shown. |
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| Place redstone wire on the last block. |
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| Place a block on top of the redstone torch as shown. |
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Step 4: Note blocks
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| Place note blocks on each of the 4 wool blocks. |
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| Tune the two note blocks not connected to the delay circuit to A (15 clicks) and E (10 clicks) as shown. |
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| Tune the two note blocks connected to the delay circuit to F# (12 clicks) and C# (7 clicks) as shown. |
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