For me, since this is an one-off prototype-ish design, I need all parts to be easily sourceable from DigiKey/Mouser, and preferrably in SMD packages that can be hand-soldered (read: ≥ 0.5mm pitch) without using hot air (read: no QFN/BGA/etc.). The rest of this post covers the design and implementation of DAC + Filter module.įinding the right set of parts is one of the most important parts of a good design. Analog attenuation (volume control) and HPF belong to this module should they be included. Input is I 2S output is (low-power) analog audio.
While the end product should ideally be a standalone USB-powered unit, I decided to break the system into modules that I can individually design, test, and iterate: USB-> -I2S-> -Analog/Raw-> -Analog/Line-Level-> -Analog/Phone-Level-> Thanks to the simple input/output, the (high-level) main signal chain is trivial: One advantage is that, with full control over all components in the pipeline, I have more degrees of freedom in design choices. I don’t want to have any analog audio connection in between. I want digital in and headphone out - and that’s it. Guideline: To achieve good objective performance within reasonable budget. While I cannot stand “crap gear”, I don’t think the more fancy and expensive gear make any difference once they cross a “good enough” line.
I play multiple instruments and was once diving into music production. Sidenote: I never consider myself an “audiophile”. Inevitably I came across NwAvGuy’s Objective 2 and ODAC designs, and realized that these consist of literally the same building blocks that I learned (and was quizzed and exam’d on) when taking my undergrad Introduction to Analog Electronics course. So even before I ordered my CEntrance DACPort Slim, I was already looking into how I can reinvent the wheel. “audiophile” products, the more snake oil I smell.
However, the more I looked at commercially available a.k.a. The same background as my previous post - basically I need a DAC for my AKG K702.
0 kommentar(er)
