{"type":"firestarter.listing","listing":{"id":"lst_MUffR3sz","product_name":"Knight School Trem (Built Pedal)","category":"Effects","description":"NOT A DIY KIT. THIS IS A FULLY BUILT PEDAL. \nWhile most guitarists recognize the word “transistor” as the fundamental effects pedal amplification parts, they have several other functions depending on how they’re wired. One such function is that of a switch. When voltage is applied to the base pin of a transistor, it “opens” the switch, i.e. connects the other two pins together.\nThis is how Boss and Ibanez’s bypass switching works, in a nutshell. But what if a pedal’s input signal was connected to a transistor’s collector, and the transistor emitter was connected to ground? When voltage is applied to the transistor base, the signal gets dumped to ground. When the voltage is cut, the signal passes through. Now, what if you could find a way to send a rhythmic positive voltage to that transistor base? It would rhythmically modulate the signal. Uh-oh, this sounds like tremolo!\nOf course, there are many ways to achieve this effect, but this is one best suited to DIY. The crudest form of this effect was first developed by Jordan Electronics with their Vico Vibe plug-in unit that definitely does the thing I just described but the LFO’s speed range isn’t so hot and only does one waveform. BO-RING!\nOur Knight School Trem gives you SIX distinct waveforms, a huge speed range control, a depth control and an LED rate indicator that mimics the selected waveform, all in an easy-to-build fully-analog package. Let’s go!","images":["https://cdn.shopify.com/s/files/1/0370/1873/0628/files/ks-trem-shop_f14f4ff8-a3cb-4bf9-aebb-2d3e2e099991.png?v=1751927927"],"price":134.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:04.157Z"},"share_url":"https://firestarter.network/l/lst_MUffR3sz","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_MUffR3sz' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Knight School Trem (Built Pedal)' and a budget_max comfortably above $134.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}