Category

Hardware

Guitar effect pedals with embedded DSP firmware on STM32H750, all hand-written from scratch.

KAROUSEL

KAROUSEL

Shipped

CTO at Keystone Musical Instruments. Sole engineer and technical decision-maker.

Rotary and drive pedal with Leslie cabinet modeling, variable horn/drum speed, and stereo output.

MCU: STM32H750 (ARM Cortex-M7, 480MHz) via Daisy SeedMemory: 128KB Flash + 480KB SRAM + 64MB SDRAM + 8MB QSPI FlashAudio: 24-bit/96kHz stereo codec, DMA-managed buffersLanguages: C++, ARM assembly (VTOR/FPU setup)
KASCADE

KASCADE

Shipped

CTO at Keystone Musical Instruments. Sole engineer and technical decision-maker.

Tape stop and delay hybrid pedal with 3 routing modes, 3 trigger modes, and true stereo with Haas offset.

MCU: STM32H750 (ARM Cortex-M7, 480MHz) via Daisy SeedMemory: 128KB Flash + 480KB SRAM + 64MB SDRAM + 8MB QSPI FlashAudio: 24-bit/96kHz stereo codec, DMA-managed buffersLanguages: C++, ARM assembly (VTOR/FPU setup)
KAVERN

KAVERN

Shipped

CTO at Keystone Musical Instruments. Sole engineer and technical decision-maker.

Plate reverb and freeze pedal with configurable diffusion, pre-delay, and stereo output.

MCU: STM32H750 (ARM Cortex-M7, 480MHz) via Daisy SeedMemory: 128KB Flash + 480KB SRAM + 64MB SDRAM + 8MB QSPI FlashAudio: 24-bit/96kHz stereo codec, DMA-managed buffersLanguages: C++, ARM assembly (VTOR/FPU setup)
KLIPTOR

KLIPTOR

Shipped

CTO at Keystone Musical Instruments. Sole engineer and technical decision-maker.

Tremolo and filter pedal with an 8-step beat-locked filter sequencer, 3 gate shapes, and zero-latency operation.

MCU: STM32H750 (ARM Cortex-M7, 480MHz) via Daisy SeedMemory: 128KB Flash + 480KB SRAM + 64MB SDRAM + 8MB QSPI FlashAudio: 24-bit/96kHz stereo codec, DMA-managed buffersLanguages: C++, ARM assembly (VTOR/FPU setup)
KONTINUUM

KONTINUUM

Shipped

CTO at Keystone Musical Instruments. Sole engineer and technical decision-maker.

Tap-tempo delay pedal with MIDI sync, flutter/wow modulation, and tempo divisions including dotted and triplet modes.

MCU: STM32H750 (ARM Cortex-M7, 480MHz) via Daisy SeedMemory: 128KB Flash + 480KB SRAM + 64MB SDRAM + 8MB QSPI FlashAudio: 24-bit/96kHz stereo codec, DMA-managed buffersLanguages: C++, ARM assembly (VTOR/FPU setup)
KOSMOS

KOSMOS

Shipped

CTO at Keystone Musical Instruments. Sole engineer and technical decision-maker.

Multi-stage phaser pedal with deep modulation control, stereo output, and MIDI sync.

MCU: STM32H750 (ARM Cortex-M7, 480MHz) via Daisy SeedMemory: 128KB Flash + 480KB SRAM + 64MB SDRAM + 8MB QSPI FlashAudio: 24-bit/96kHz stereo codec, DMA-managed buffersLanguages: C++, ARM assembly (VTOR/FPU setup)
KUTTOR

KUTTOR

Shipped

CTO at Keystone Musical Instruments. Sole engineer and technical decision-maker.

Beat repeater and slice shaper pedal with 3 scale modes (Pulsar/Quasar/Magnetar), 10 pitch scales, and arpeggio generation.

MCU: STM32H750 (ARM Cortex-M7, 480MHz) via Daisy SeedMemory: 128KB Flash + 480KB SRAM + 64MB SDRAM + 8MB QSPI FlashAudio: 24-bit/96kHz stereo codec, DMA-managed buffersLanguages: C++, ARM assembly (VTOR/FPU setup)