NAMM 2023 - Dave Rossum - Sound Semiconductor

video upload by sonicstate

"At NAMM 2023, Sonic State caught up with Dave Rossum, the founder of Sound Semiconductor, to discuss the company's exciting developments. Sound Semiconductor is a development from SSM, a company that designed synthesizer chips for the first Prophets in the early 1970s. SSM went on to produce chips for professional audio and was later acquired by Analog Devices. In 2016, Rossum, along with Marco Alpert and a little bit of seed capital from Universal Audio, started Rossum Electro Music. At NAMM, they met Dan Parks, who used to run SSM, and talked about the idea of resurrecting the classic SSM chips. Six months later, they started Sound Semiconductor, which includes some resurrections of the classic SSM chips and some new ideas.

Rossum explained that the analog chips give instruments their own unique character, which digital processing cannot achieve. Analog chips have variations from unit to unit, and the designer's job is to make those variations as small as possible while allowing those variations to give instruments their own individual character. Analog distortions are also natural, making them more appealing to the ears than digital algorithms that give aliasing, and Dave told us he finds designing analog chips to be more artistic and enjoyable than designing digital ones.

https://soundsemiconductor.com/"

Phase modulation of the Analog Devices AD9833 DDS

Published on Apr 23, 2018 DutchBigEd

"This is a short demo of phase modulation of the Analog Devices AD9833 DDS chip with an Arduino (Atmega328p).
First part is where the hard sync input frequency is varied, than the phase of the hard sync is modulated en than the frequentie of the ad9833 is modulated.

The last part all three variables are modulated.

The sync input is PD2 (INT0), the phase input is ADC0 (PC0) and the Frequency input to control the AD9833 is ADC1 (PC1)."

Note this is the first post to feature the Analog Devices AD9833 DDS chip. You can find previous DIY videos from DutchBigEd here.

via Analog Devices:

"The AD9833 is a low power, programmable waveform generator capable of producing sine, triangular, and square wave outputs. Waveform generation is required in various types of sensing, actuation, and time domain reflectometry (TDR) applications. The output frequency and phase are software programmable, allowing easy tuning. No external components are needed. The frequency registers are 28 bits; with a 25 MHz clock rate, resolution of 0.1 Hz can be achieved. Similarly, with a 1 MHz clock rate, the AD9833 can be tuned to 0.004 Hz resolution.

The AD9833 is written to via a 3-wire serial interface. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards. The device operates with a power supply from 2.3 V to 5.5 V.

The AD9833 has a power-down function (SLEEP). This allows sections of the device that are not being used to be powered down, thus minimizing the current consumption of the part, e.g., the DAC can be powered down when a clock output is being generated.

The AD9833 is available in a 10-lead MSOP package.

Applications

Frequency Stimulus/Waveform Generation
Liquid and Gas Flow Measurement
Sensory Applications–Proximity, Motion, and Defect Detection
Line Loss/Attenuation
Test and Medical Equipment
Sweep/Clock Generators
Time domain reflectometry (TDR) applications"