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This Week In Security: Symbiote, Smart Locks, And CosmicStrand 21 Comments Switch mode supply with thin input wire where there is going to be huge discontinuous switching waveform… That is asking for trouble as some of the return current might decided to go through the audio grounds to the amp.

You basically have no clue how quickly it folds at higher frequency.Īlso have to think about grounding of the setup. I wouldn’t trust the 50dB PSRR of the DSP too much as they only give you a single number at 1kHz and not even show you a plot vs frequency of the typical part. If not carefully treated, some of that can alias into the audio range. Probably should use some additional RC filtering on the output side and a better LDO with PSRR at the switching frequency of the power supply. The output current waveform is continuous, but still want to have a snubber as they tend to have a high frequency ringing due to parasitic. That can get injected back to the power amplifier power supply. In a buck configuration, the input filter is critical as the input side sees a discontinuous chopping waveform. They are not know to put in additional filters nor use good quality capacitors. He kinda of ruined some of the noise floor for using $2 Chinese switch mode power supply drawn from the amplifier to power the DSP. Posted in digital audio hacks Tagged adau1701, adc, crossover, dac, dsp, SigmaDSP, SigmaStudio, speakers Post navigation

By dropping a few components in and programming to EEPROM, the DSP can be easily reconfigured for a variety of applications. This is critical for good audio performance since drivers can only perform well in a certain part of the audio spectrum.Īnalog Devices provides SigmaStudio, a free tool that lets you program the DSP using a drag-and-drop interface. This device takes an input audio signal and splits it up based on frequency so that subwoofers get the low frequency components and tweeters get the higher frequency components. ’s main goal with the DSP 01 was to implement an audio crossover. This DSP chip includes two ADCs for audio input, and four DACs for audio output. These can be controlled by the built in DSP processor core, which has I/O for switches, buttons, and knobs. The DSP 01 is based around the Analog Devices ADAU1701.

They’re also hard to tinker with, since modifying parameters involves replacing components. Analog systems can provide great audio performance, but they tend to be quite costly. Audiophiles tend to put analog systems on a pedestal.