SB Live! 24-Bit USB External Setup

Here are the detailed steps for setting up the SB Live! 24-Bit USB External soundcard for use with REW under Windows XP.

Sample rate and bit depth settings

Although REW uses 16 bit audio samples at either 44.1 or 48kHz, it is possible to set the SB Live! card to use 16 or 24-bit samples at 44.1, 48 or 96kHz. Changing the sample rate settings slightly alters the internal filtering in the soundcard, example measurements in the different settings are shown in the graphs below. Using 16 or 24 bit settings makes no difference as REW uses 16 bit samples. 48kHz/16-bit is recommended, make sure the REW rate is the same as that set for the soundcard, when the rates are different the soundcard will resample slightly degrading the measurement quality. Note that 96kHz/24-bit may not be possible depending on your USB connection, if so this message will appear:
SB Live Insufficient Bandwidth message

Measurement Results at various sample rates

Measured with a single 256k sweep at -12 dBFS Sweep Level.

Frequency Responses

SB Live! at 44.1kHz, 48kHz and 96kHz

Impulse Responses

SB Live! at 44.1kHz, 48kHz and 96kHz

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