Many DAC chips and devices using those chip have user selectable options for digital filter response to fine-tune tonal characteristics. I will take PCM1794A used on H-DAC as an example and see what effects these filter types have on impulse and frequency responses. This is just scratching the surface of the topic by briefly introducing some technical effects that can be measured. Tonal characteristics are not discussed here; those are highly subjective and a topic of another post (or debate).
Dual Trafo provides three unregulated low power voltage rails for mixed signal devices, such as DACs. The board can be followed by a regulator board such as SmartPSU3 or SimplePSU3 (without filter capacitors) or it can be used to feed application board’s regulators.
Digital signal processor designed for my 4-channel DIY system.
Note that this is one of my “old” projects and is kind of obsolete. I do have bare PCBs if someone wants but I have no intentions to further develop the design, documentation, or measurements, which are not really comprehensive. However, the device was fully functional so feel free to pick tips for your own implementation.
This is not my own design but incorporates OEM/DIY modules from Hypex to make up a rather impressive stereo power amplifier: