sajunky
AVForums Veteran
Hi, there,
It is not commercial, so I hope it will not violate forum rules.
Details are there: https://www.diyaudio.com/forums/digital-line-level/324933-lingdac-cost-effective-rbcd-multibit-dac-design.html
Note that the kit is not for 3-board ling-DAC as stated in a title, but a single board PhiDAC. This thread covers both. It is a careful design with a passive LC filter, an active I/F conversion and a DAC sounds very musical unlike delta-sigma converters. Kit contains the bare/unpopulated circuit board, and all the components needed to assemble a working board. You will need to provide the power supply, enclosure, and connectors. Soldering skills and some basic electronic experience is required, I may assist. Remember also that PhiDAC takes no USB, but I2S source, so it is a front-end to the Raspberry Pi (with proper OS) or other I2S music source.
The kits are free, but you have to cover shipping. International shipping outside the USA tends to be expensive: costs start around $25 USD. It is why I am posting. If you are interested, contact this person: https://www.diyaudio.com/forums/digital-line-level/324933-lingdac-cost-effective-rbcd-multibit-dac-design-post5860384.html
I have reserved one for myself, the shipment can be combined, avoiding SAPO and costs split, I stay in Joburg, border of Pretoria,
On a technical note: a DAC chip is TDA1387 (R2R with continuous calibration). It is 16-bit (no hires, DSD, etc...), probably recycled from old Sound Blaster AWE cards.
Filter is designed for 44.1kHz source (NOS - no oversampling), but the chip can take up to +300kHz, so it is possible to resample in Foobar with proper dithering (and it does it with better quality than any commercial player), then filter values should change, of course.
It is not commercial, so I hope it will not violate forum rules.
Details are there: https://www.diyaudio.com/forums/digital-line-level/324933-lingdac-cost-effective-rbcd-multibit-dac-design.html
Note that the kit is not for 3-board ling-DAC as stated in a title, but a single board PhiDAC. This thread covers both. It is a careful design with a passive LC filter, an active I/F conversion and a DAC sounds very musical unlike delta-sigma converters. Kit contains the bare/unpopulated circuit board, and all the components needed to assemble a working board. You will need to provide the power supply, enclosure, and connectors. Soldering skills and some basic electronic experience is required, I may assist. Remember also that PhiDAC takes no USB, but I2S source, so it is a front-end to the Raspberry Pi (with proper OS) or other I2S music source.
The kits are free, but you have to cover shipping. International shipping outside the USA tends to be expensive: costs start around $25 USD. It is why I am posting. If you are interested, contact this person: https://www.diyaudio.com/forums/digital-line-level/324933-lingdac-cost-effective-rbcd-multibit-dac-design-post5860384.html
I have reserved one for myself, the shipment can be combined, avoiding SAPO and costs split, I stay in Joburg, border of Pretoria,
On a technical note: a DAC chip is TDA1387 (R2R with continuous calibration). It is 16-bit (no hires, DSD, etc...), probably recycled from old Sound Blaster AWE cards.
Filter is designed for 44.1kHz source (NOS - no oversampling), but the chip can take up to +300kHz, so it is possible to resample in Foobar with proper dithering (and it does it with better quality than any commercial player), then filter values should change, of course.
