TAS5538 Loudness Algorithm of TAS5538 and TAS3103

Sadanori Kato

Other Parts Discussed in Thread: TAS5538, TAS3103, TAS5508

Hi,

Is the loudness algorithm of TAS5538 and TAS3103 same?
When we suggested the ALE tool to our customer, we have obtained this question from him.
Could you please advise us about it?

Best Regards,
Kato

over 9 years ago

0 Don Dapkus over 9 years ago

TI__Guru**** 189399 points

Hi, Kato-san,

I've asked my colleague to work with you on this issue.

-d2

0 Sadanori Kato over 9 years ago in reply to Don Dapkus

Guru 36490 points

Hi Don-san,

I am looking forward to your reply for this issue.

Best Regards,
Kato

0 user5276421 over 9 years ago in reply to Sadanori Kato

TI__Mastermind 37045 points

Kato-san,

I will get back to you on this.

reg,

Paul.

0 user5276421 over 9 years ago

TI__Mastermind 37045 points

8182.ALE 5.2.zip

Hi, Kato-san,

Do you have the ALE5.2 attached? You can use the loudness design tool for TAS5508 and TAS5538.

reg,

Paul.

0 Sadanori Kato over 9 years ago in reply to user5276421

Guru 36490 points

Hi Paul-san,

Thank you for your reply.
I have obtained the ALE5.2 tools from your team.
So, our customer would like to know the difference between TAS5538 and TAS3103 regarding the loudness algorithm.
Could you please confirm it again?

Best Regards,
Kato

0 Tuan over 9 years ago in reply to Sadanori Kato

TI__Mastermind 33420 points

Hi Kato-san:

Both TAS5538 and TAS3103 loudness functions are volume based so the algorithms are the same. You can compare the loudness equations in the data sheets and they are the same. Even the formats for volume, gain and offset are the same.

The only difference is that in the TAS5538, the loudness biquads have default values. For TAS3103, the customer needs to define these values. Hope this helps.

Best regards,

Tuan

0 Sadanori Kato over 9 years ago in reply to Tuan

Guru 36490 points

Hi Tuan-san,

Thank you for explaining so politely.
I understood that these loudness algorithm are same.
In addition, could you please give me your advice if you know as below?

<TAS5534 Loudness Processing Block Diagram>
http://e2e.ti.com/support/amplifiers/audio_amplifiers/f/6/p/324353/1169505.aspx#1169505

<TAS5534 Max Volume of Loudness Compensation Parameters>
http://e2e.ti.com/support/amplifiers/audio_amplifiers/f/6/p/324345/1169503.aspx#1169503

Best Regards,
Kato

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TAS5538 Loudness Algorithm of TAS5538 and TAS3103