p-funk · HackerTrans

6 năm trướcdiscuss

We did a lot of blind testing, but blind testing takes more effort and we were always swamped. Usually the engineers would just test things ourselves, and then I would give my boss a blind test for the final approval.

p-funk

6 năm trướcdiscuss

At my last company, we tested tons of combinations of class D modules with various power supplies, and the best sounding results tended to be with linear power supplies. Don't get me wrong, there's tons of tricky stuff when it comes to the subjective side of audio, so it may be at least partially placebo effect. But we pretty consistently found that off the shelf switching PSUs sounded worse subjectively, even if they measured the same on the bench.

I haven't been doing audio for a while, so I don't remember more of the details. But audio signals tend to need all their power in short bursts all at once, when a low frequency bass note hits for example, and so the transient current tends to be much more important than a stable voltage rail. A lot of switching supplies do not optimize for this. Well designed versions can both sound great, but a cheap linear supply is going to sound much better than a cheap switcher. Audio is stuck with 1960s technology for the most part anyway though.

p-funk

6 năm trướcdiscuss

This youtube channel has (seemingly good quality) Khan Academy style lecture videos on control systems, if you just want a quick introduction to the concepts.

https://www.youtube.com/watch?v=ThoA4amCAX4

p-funk

6 năm trướcdiscuss

Location: Cincinnati, OH

Remote: Yes

Willing to relocate: Yes

Technologies:

-Embedded systems: C/C++, Arm core microcontrollers, Atmel, Cypress, STM32, etc.

-Web: HTML, CSS, Javascript, React

-Other: SQL, MongoDB, Catch2, Mocha, AWS, C#, some Rust, some Python

Résumé/CV:

  pmusgrave.github.io/contact

  github.com/pmusgrave

  https://www.linkedin.com/in/paul-musgrave-74818842/

Email: [email protected]

Hi, I'm Paul, I'm a software engineer. My latest project is an IoT home automation system and dashboard in React that ties together a lot of microcontroller projects I built. I've previously designed high quality pro audio equipment and developed software in the structural engineering industry.

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