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ModusToolbox Bluetooth SDK

New Contributor II

Dear all.

Have any question of CYW20721 support audio codec.

My customer going to produce the audio device through CYW20721.

CYW20721 support aptx audio codec ?

And how can i check the support codecs?

if CYW20721 series not supported aptx codec, Could you advice substitute chipset?

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1 Solution
Employee

Hi,

The CYW20721B2 only supports AAC and SBC as the software formatting codecs for A2DP playback.  We do not support AptX nor AptX HD on any of our products.

Dili

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6 Replies
Moderator
Moderator

Hi BeKi_4844661 ,

You can choose the Codec compatible with the I2S/PCM parameters supported by CYW20721.

For frequency and word length details, please refer CYW20721 datasheet : https://www.cypress.com/documentation/datasheets/cyw20721-enhanced-low-power-bredrble-bluetooth-50-s...

We don not have any specific recommendations for Codec. WM8731 , AK4679 and CS47L35 (Cirrus) are the few which we tested & used for internal testing.

Other references:

Regards,

Anjana

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New Contributor II

Dear Anjana.

CYW20721 supported 48 kHz x 32 bits per frame, this is right?

but aptx hd used sampling rate 48khz & 24bits.

Can i implement the aptx hd through CYW20721?

may possible generate problem?

thank you for your supports.

Regards,

BRK.

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Employee

Hi,

The CYW20721B2 only supports AAC and SBC as the software formatting codecs for A2DP playback.  We do not support AptX nor AptX HD on any of our products.

Dili

View solution in original post

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New Contributor II

Dear Dili.

According to your response CYW20721B2 not support APTX or APTX HD audio codec.

therfore CYW20721B2 use APTX or APTX HD audio codec impossible?

because to bitrate or anything else ?

Can i get anything else support  from Cypress to use APTX, APTX HD audio codec?

for example Patch ram, library and so on.

thank you for your supports.

Regards,

BRK.

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Employee

Hi,

AptX and AptX HD are audio codecs from Qualcomm.  Qualcomm is a direct competitor.   

Dilli

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New Contributor II

Dear Dili.

thank you for response.

Our customer want to implement AAC & APTX codec through  CYW20721B2.

They to be curious to the upper content implement.

You mean the nothing way to use APTX, right?

thank you for your supports.

Regards,

BRK.

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