TAS5711: Amount of time until DRC operated

na na78

Guru 16770 points

Part Number: TAS5711

Our customer want to estimate the amount of time until DRC operated.

Is the sum of time "Energy Filtering" and "Compression Control" and "Attack and Decay Filtering"?

Is it possible to calculate amount of time?

BestRegards

over 5 years ago

0 Adam Sidelsky over 5 years ago

TI__Guru 61280 points

Hello,

Are they asking the propagation delay through these elements?

Regards,

-Adam

0 na na78 over 5 years ago in reply to Adam Sidelsky

Guru 16770 points

I'm sorry for ambiguous question.

Let me post question again with other words.

The customer wants to expect the actual time until DRC detecting over threshold and compressing output.

They expected 20msec (Energy = 10msec and Attack time = 10msec) until clipping starts (over threshold) and resolved, but it takes 46msec actually.

I attached some data.

Do you have reason why it occurs?

BestRegards

0 Adam Sidelsky over 5 years ago in reply to na na78

TI__Guru 61280 points

Hello,

If the customer reduces the Energy and Attack time, does the 46mS reduce?

How is the 46mS measured?

Regards,

-Adam

0 na na78 over 5 years ago in reply to Adam Sidelsky

Guru 16770 points

Hi Adam

Thank you for your reply.

I add supplemental.

I could have confirmed that the customer reduced energy and attack time.

However, they said that the time with setting energy =10msec and attack = 50msec results in 140msec by measurement.

The customer wants to confirm the relevance of energy time, attack time, decay time and actual time.

If there is an formula or specific way for calculation, please tell us. I will share it with customer.

BestRegards

0 Adam Sidelsky over 5 years ago in reply to na na78

TI__Guru 61280 points

Hello,

From the scope image I am not able to see clear enough detail where the clipping starts and ends, can you send a larger picture?

Regards,

-Adam

0 Shawn Zheng over 5 years ago in reply to Adam Sidelsky

TI__Mastermind 24835 points

Hi nana-san,
The attack time(10ms) is the preiod that the signal decreases from 100% to 36.8%(1/e). When it gets to 0%, the signal becomes unclipped. I think your measurement is from 100% to 0%, the 46ms total time looks reasonable.
Best regards,
Shawn Zheng

0 na na78 over 5 years ago in reply to Shawn Zheng

Guru 16770 points

Hi Shawn

I'm sorry for my late reply and thank you for your help.

I will open another thread if I got additional questions.

BestRegards

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TAS5711: Amount of time until DRC operated