SigmaDSP Processors & SigmaStudio Dev. Tool

Q&A How do I change the sample rate of my SigmaStudio system?

Products Mentioned

AD1940 Production
The AD1940 / AD1941 are a complete 28-bit, single-chip, multi-channel audio SigmaDSP™ for equalization, multiband dynamic processing, delay compensation...
Datasheet
AD1940 on Analog.com

ADAU1702 Production
The ADAU1702 is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. Signal processing...
Datasheet
ADAU1702 on Analog.com

Associated Drivers

ADAU1401 Not Recommended for New Designs
The ADAU1401 is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. Signal processing...
Datasheet
ADAU1401 on Analog.com

Associated Drivers

AD1941 Obsolete
The AD1940/AD1941 are a complete 28-bit, single-chip, multi-channel audio SigmaDSP™ for equalization, multiband dynamic processing, delay compensation...
Datasheet
AD1941 on Analog.com

ADAU1446 Production
The ADAU1442 / ADAU1445 / ADAU1446 are enhanced audio processors that allow full flexibility in routing all input and output signals. The SigmaDSP® core...
Datasheet
ADAU1446 on Analog.com

ADAU1442 Production
The ADAU1442 / ADAU1445 / ADAU1446 are enhanced audio processors that allow full flexibility in routing all input and output signals. The SigmaDSP® core...
Datasheet
ADAU1442 on Analog.com

ADAU1445 Production
The ADAU1442 / ADAU1445 / ADAU1446 are enhanced audio processors that allow full flexibility in routing all input and output signals. The SigmaDSP® core...
Datasheet
ADAU1445 on Analog.com

ADAU1761 Production
The ADAU1761 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback at 14 mW from...
Datasheet
ADAU1761 on Analog.com

Associated Drivers

ADAU1701 Production
The ADAU1701 is a complete single-chip audio system with a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces. Signal processing...
Datasheet
ADAU1701 on Analog.com

Associated Drivers

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How do I change the sample rate of my SigmaStudio system?

ADIApproved

on Oct 12, 2009

The default sample rate for SigmaStudio projects is 48 kHz. I want to run my system at a different sample rate. How do I do so?

Tags: ad1940 Audio Signal Processors adau1702 adau1401 ad1941 adau1446 adau1442 adau1445 rate sigmastudio SigmaDSP Audio Processors sample adau1761 frequency SigmaDSP adau1701 Show More

0 ADIApproved

on Oct 12, 2009 3:20 PM
In order to change the sample rate of a system, follow these steps:

Setting Software Sample Rate

Locate the sample rate section of the toolbar.

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/d5e501686954d41ebb4979ec44fc5cb2.bin

Click the drop-down box, and select a new sample rate.

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/bc883583d59c68c187e1005f1a904587.bin

Click the "Set System Sample Rate" button to the left of the drop-down box.

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/6b1402468ba0536272c146f32abe8bbf.bin

Click the "Yes" button to confirm the sample rate change.

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/e44ffce79be6df65aba8d9f620992732.bin

Link-Compile-Download the project in order to calculate and download the new coefficients for time-dependent algorithms.

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/145933e39346fcb877908a8023f39dc1.bin

Setting Hardware Sample Rate

Locate the core frame rate register in the Register Control Window and set it to the new sample rate. The name and address of this register differs depending on which IC is being used. Here are a few examples:

AD194x:

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/5c1b81e43e0d2f751c28b1d587af7401.bin

ADAU144x:

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/a62cce5c998fef9712d1ac19acbd5a9f.bin

ADAU170x/ADAU1401:

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/c8ef46dd59aec516ad8d68440218ac7f.bin

ADAU176x:

https://ez.analog.com/cfs-file/__key/communityserver-discussions-components-files/396/48eb4621a2e2d1662cbca6c813d9dd76.bin
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0 francescodenetto
on Dec 25, 2015 6:36 PM
It's possible to do this in adau1452 evaluation board? It's will work?
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0 EZAdministrator
on Apr 29, 2019 6:14 AM
This question has been closed by the EZ team and is assumed answered.
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0 bnilsson
on Jan 22, 2020 3:16 AM in reply to EZAdministrator
Sorry, but I have the same question but now for my ADSP-SC589_EZ evaluation board, which is not included here.

Are there any updated instructions on this issue?

BN
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0 DaveThib

on Jan 24, 2020 5:53 PM in reply to bnilsson
Hello bnilsson,

I would post this question on the SHARC section of this forum.

SigmaStudio will work the same way for the SHARC DSPs, the sample rate at the top of the window is only for SigmaStudio to properly program code that needs to know what the sample rate is. It is up to you to be certain that the registers in the DSP are properly set and the clocks going to the part are correct to obtain the desired sample rate inside the DSP. SigmaStudio does not know what rate the DSP is actually running at.

Dave T
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0 gdqw
on Apr 3, 2023 2:42 AM in reply to ADIApproved
电路硬件方面需要修改吗？比如晶振 PLL的参数
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