by Brewster LaMacchia | Nov 16, 2025 | Audio, Bluetooth, Testing
Clockworks works with Cloud2GND on Bluetooth Low Energy (BLE) audio applications development. The first part of a four part articles series is available on line for subscribers of audioXpress magazine. About 6 months after the last part’s publication date...
by Brewster LaMacchia | May 9, 2020 | Audio, Hardware, Testing
In testing some of the A2B hardware what appeared to be high jitter on the clocks was observed. While specialized scopes & software are available for making jitter measurements one was not available at the time measurements were needed. The basic idea is simple...
by Brewster LaMacchia | May 25, 2018 | Audio, Testing
This is the long delayed followup to the earlier post about power resistors as dummy loads and the nonlinearities found. After some further experimentation an 8 ohm load was built from four Riedon PF2270 series 2 ohm 200W thin film resistors (to give an 8 ohm load)...
by Brewster LaMacchia | May 25, 2018 | Audio, Design, Testing
As part of some ongoing work earlier this year I needed to test the performance of a high performance 200W/channel class D amp (more on the amp in some future post). To get accurate SNR and THD+N measurements a low pass filter is needed in front of the measurement...
by Brewster LaMacchia | May 1, 2018 | Hardware, Testing
In a previous post a distortion producing alligator clip was unearthed. In this post high resistance test leads are discovered. These are generic banana plug to alligator clips (Vellman TLM3) that were purchased from Jameco: which are obvious generic made in China...
by Brewster LaMacchia | Mar 1, 2018 | Audio, Audio Builders Workshop, Testing
This post is one of three related to the work done to measure resistor excess noise. A summary writeup and three other documents with experimental detail are provided to those interested in performing their own experiments. These long form reports were summarized in...
