You Can DIY! Building a Guitar-Controlled Synthesizer - The Sample & Hold Time Machine

This article initiates a fascinating DIY journey through the world of synthesizers. More specifically, a guitar-controlled all-analog synthesizer project that includes a "time machine" sample & hold section, input signal detectors, noise gate, oscillators, envelope generators, filters, signal converters, and more. This first module is a sample and hold circuit designed to translate the guitar notes to equivalent oscillator frequencies.

MUTEC GmbH, the Berlin-based manufacturer of audio equipment for studio professionals and the most demanding audio enthusiasts, announced an attractive upgrade option for users of its proven MUTEC REF10 reference master clock to evolve to the evolved level of the company's latest REF10 SE120. The decision by MUTEC to offer the upgrade was taken in the interest of general sustainability and improving the lasting value of its products.

Our first issue for the New Year highlights the main technologies and product launches at the 135th Audio Engineering Society (AES) Convention, one of the best audio engineering-related events in the US. While there, AES celebrated its 65th anniversary. And, …

Charles Hansen described a DIY phase meter calibrator using all-pass, phase-shift filters in a November 2006 article published in audioXpress magazine. Being able to measure phase angle is often helpful, so Ron Tipton decided to build the calibrator as described. In Hansen's design, there was a set of five calibrations frequencies: 10 Hz, 100 Hz, 1000 Hz, 10 kHz, and 100 kHz. Hansen relied on an external oscillator to drive the calibrator at these input frequencies. Ron Tipton made some modifications that better suited his needs, described in this article.