audioXpress - December 2016

8 Experience Disk Recording 1930 to 1960
By James Wood
Unearth this lost archive and explore a bygone era of early recordings from the “golden years of audio” and personal stories told by the late Robert Morrison.

10 Room Correction Revisited (Part 6)
miniDSP DDRC-24
By Ron Tipton
This month we investigate a new compact unit that is now the world’s smallest Dirac Live hardware processor.

32 Innovative Measurement Microphones from
PCB Piezotronics
By Stuart Yaniger
Learn more about four measurement microphones from PCB Piezotronics’ professional line.

40 Mytek Digital Brooklyn DAC Preamplifier and Headphone Amplifier
Born in New York
By Oliver A. Masciarotte
Discover Mytek’s Brooklyn, an exceptional device capable of decoding all the modern formats as well as one so new that only a handful of DACs provide support.

46 Retro-Style High-Fidelity Preamplifier
By Bill Christie
Build a full-featured preamplifier with volume, balance, and tone controls.

52 Optocouplers in a MOSFET Power Amplifier Design By Richard K. Mains
Explore a novel method of temperature compensation in audio power amplifiers that utilize MOSFETs as the output devices.

STANDARDS REVIEW
16 USB 3.1, USB Type-C, and Thunderbolt 3 (Part 1)
An Introduction to the
Latest Interfaces
By João Martins

SOUND CONTROL
26 A Complementarity Principle in Acoustics
By Richard Honeycutt
Hollow-State Electronics
60 Tremolo Circuits in Guitar Amplifiers
By Richard Honeycutt