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DIY & Tutorials
DIY For Audio
Long-term active speaker project
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<blockquote data-quote="pwatts" data-source="post: 1162782" data-attributes="member: 146"><p>Last for today is the DSP module. Two of these are used, one per channel. Interfacing with the ADC & 3x DAC modules are done with high-speed connectors at the rear.</p><p></p><p>PCB is 6-layer with careful attention on power supply separation and RF planes. Very low-noise regulators again are used. The DSP is enclosed in a Faraday cage (lid removed here) to avoid the high-frequency noise from coupling to the outside.</p><p></p><p>Incoming signals and Master clock are presented on 50Ohm u.fl connectors, in the picture a temporary wire is used for a local clock for easier initial debugging. Input signals are resampled to 96kHz before entering the DSP. This board does not connect directly to the input board, but via an IanCanada McFifo board for reclocking the input signals first.</p></blockquote><p></p>
[QUOTE="pwatts, post: 1162782, member: 146"] Last for today is the DSP module. Two of these are used, one per channel. Interfacing with the ADC & 3x DAC modules are done with high-speed connectors at the rear. PCB is 6-layer with careful attention on power supply separation and RF planes. Very low-noise regulators again are used. The DSP is enclosed in a Faraday cage (lid removed here) to avoid the high-frequency noise from coupling to the outside. Incoming signals and Master clock are presented on 50Ohm u.fl connectors, in the picture a temporary wire is used for a local clock for easier initial debugging. Input signals are resampled to 96kHz before entering the DSP. This board does not connect directly to the input board, but via an IanCanada McFifo board for reclocking the input signals first. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Long-term active speaker project
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