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Noise floor spectrograms at 48000


The spectrogram of a linear sine sweep can summarize the ADC and DAC performance of an audio device in a single image.  The noise floors of several audio devices at 48000 (or their native sample rate) are compared below.  Signal generation and collection were in full duplex loopback mode with both the ADC and DAC set to the device's native sample rate.

This gallery is part of the Full Duplex DAQ comparison survey. 


Cirrus Logic CS4236B CS4236B (44100) Sound Blaster Vibra16X

Sound Blaster 16 PCI Sound Blaster 128 Sound Blaster Live!

VIA 8235 SiS 7012 ESS Maestro 2E

Griffin iMic v0.06 Griffin iMic v3.00 Edirol UA-25


Most of the spectrogram images have very clean noise floors.

The Cirrus Logic CS4236B (44100) and the Sound Blaster Vibra16X ISA card have noise floor spectrograms that look almost identical.  This is because the Vibra16X is a half duplex card and the CS4236B was used as the test sink.

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