Hacker News: WeebLabs

New comment by WeebLabs in "Fully Featured Audio DSP Firmware for the Raspberry Pi Pico"

WeebLabs — Mon, 27 Apr 2026 20:00:11 +0000

There is a comprehensive readme on the repository but I will soon be adding a simplified "Getting Started" section.

New comment by WeebLabs in "Fully Featured Audio DSP Firmware for the Raspberry Pi Pico"

WeebLabs — Mon, 27 Apr 2026 19:40:58 +0000

For USB input and SPDIF output, all that you need is a TOSLINK TX module(s) or a couple of capacitors and a resistor if you want coaxial SPDIF. For I2S output, the PCM5102A modules that you find on Amazon work very well, with very reasonable performance (SNR >100dB, THD+N ~95dB).

For 2.1 configurations in a pinch, the firmware includes a software DAC that's more than adequate to drive a subwoofer, so only one external DAC is needed.

New comment by WeebLabs in "Fully Featured Audio DSP Firmware for the Raspberry Pi Pico"

WeebLabs — Mon, 27 Apr 2026 18:32:44 +0000

Thank you! I will soon be producing a comprehensive introductory video on YouTube, which should make things more accessible.

There will also be an official plug-and-play custom board that includes all of the relevant IO, connectors and codecs.

New comment by WeebLabs in "Fully Featured Audio DSP Firmware for the Raspberry Pi Pico"

WeebLabs — Mon, 27 Apr 2026 18:29:59 +0000

PSRAM is a possibility that I have explored for offloading the delay line buffers, which occupy quite a significant chunk of SRAM at the moment. It should be fast enough.

New comment by WeebLabs in "Fully Featured Audio DSP Firmware for the Raspberry Pi Pico"

WeebLabs — Mon, 27 Apr 2026 15:05:40 +0000

Hello. I am the creator of this project! Nominal latency is currently 8ms, with ±1ms of variance. All output channels are phase-locked, so this doesn't present a problem for multi-way crossover implementations.