[shiura] had an issue — they needed a pleasant high-quality audio output for his or her pc, however they didn’t fancy any of the DACs that had been available in the marketplace. They particularly needed one which was inexpensive, succesful, and included a graphic equalizer so they may merely hook it as much as a daily amplifier and dial within the excellent sound. Once they couldn’t discover such a tool, they determined to construct their very own.
The construct relies round a Raspberry Pi Pico, chosen for its function set that makes it simple to configure as a USB audio system. It’s paired with a Waveshare Pico Audio module, which relies on the PCM5101A stereo DAC and slots neatly on high of the microcontroller board. An SPI-controlled LCD display was additionally fitted with the intention to show the graphic equalizer interface that [shiura] whipped up. The mission write-up explains the code required to implement the equalizer intimately. A four-channel equalizer was attainable on the unique Pi Pico (RP2040), whereas upgrading to a extra highly effective Pi Pico 2 (RP2350) allowed implementing eight channels in complete.
For those who’re trying to construct a digital audio system with the flexibility to do some equalization to fit your listening room, this may be a mission of curiosity to you. We’ve featured different tasks on this realm earlier than, too.
