ADAU1467 Up Sampling module gives -6dB loss

SigmaDSP & SigmaStudio takumi3952 Apr 25, 2019 00:00 2 replies Original on forum ↗

ICs: ADAU1467

takumi3952 Question

Apr 25, 2019 00:00

Hi,

The following Up Sampling converter is used to convert 48K source to 96K system.

https://wiki.analog.com/resources/tools-software/sigmastudio/toolbox/multirateprocessing/upsampling

The output of this module is given a loss of -6dB.

Is this a specification?

Is there no way to avoid it?

Thanks and Regards,

Audio Signal Processors

ADAU1467 SigmaStudio SigmaDSP

adau1467

SigmaDSP Audio Processors

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DaveThib Reply

Apr 26, 2019 00:00

Hello takumi3952,

How is this being used in a schematic? The full use in the system?

This cell is meant to be used after a down sampling cell was used. This would create a multit-rate program thread so if that does not exist then it may be giving you the incorrect results.

Dave T

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takumi3952 Reply

May 8, 2019 00:00

Hi Dave,

Please see the following project.

The observed amplitude before and after the converter is different.

Please let me know if this is a specification or a problem with usage.

Design_No62_48K96K.zip

Thanks and Regards,

Design_No62_48K96K.zip17.5 KB

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