In the latest issue of Linear Audio − Linear Audio Volume 3 − a team of recognised authors has created interesting, entertaining and project-ready articles.
Richard Burwen starts off by explaining how audio tweaks that ‘cannot work’ may still cause audible differences. Then there are a couple of tutorials: How signal interpolation can improve DAC performance, and how to design that great class-A enclosure from a thermal and dissipation point of view.
Several circuit design articles follow: a headphone buffer/amp with in-ear equalization; the long-awaited Part II of Scott Wurcer’s mic preamp article; how to correct for cartridge resonance; and a pair of passive, discrete DAC I/V converters.
On the speaker front there is an article on how to design a subwoofer for THX performance, while your lab gets a boost from a floating simulated inductor from 10mH to 10H for filter and xover experiments, and a low noise, lab-grade measurement preamp.
Stan Curtis reviews the state of audio and concludes that lots of work still has to be done, especially in digital format.