Welcome, Guest
Username: Password: Remember me
Forgot your password? Forgot your username? Create an account
Forum
Tutorials - Community powered
System equalization
Is it possible to do this?
All tutorials related to equalization of a system with miniDSP platforms.

TOPIC: Is it possible to do this?

Is it possible to do this? 1 year 11 months ago #21270

  • lito
  • lito's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 4
  • Karma: 0
hi,
is it possible to use biquad filters to say increase or drecrease the output by say 3 db using biquad without using the digital output gain. How do you do this? Thanks

Lito
The administrator has disabled public write access.

Is it possible to do this? 1 year 11 months ago #21271

  • john.reekie
  • john.reekie's Avatar
  • Offline
  • Platinum Boarder
  • Posts: 2727
  • Thank you received: 1130
  • Karma: 114
I believe if you set b0 to 1.414 or 0.707 (others at zero), that will do it.

Not sure why though - ?
I am not miniDSP support.

"You must ask the right questions." - Dr. Alfred Lanning's hologram.
-> Have you read the User Manual??
-> Have you drawn and posted a diagram?
-> Have you posted a screenshot?
-> Have you posted your config file?
The administrator has disabled public write access.

Is it possible to do this? 1 year 11 months ago #21302

  • devteam
  • devteam's Avatar
  • Offline
  • Administrator
  • Posts: 5837
  • Thank you received: 709
  • Karma: 132
@ Lito,

Yes, you indeed can do it:

If you want to combine Gain (GdB) to one of your biquad filter, there is a simple way. Simply "Multiply" your numerators (all b0, b1, b2) to the linear gain value. (Glin)

e.g. H(z) = Glin * (b0 + b1z-1 + b2z-2) / ( 1+a1z-1 + a2z-2)
So Glin = 10^(GdB/20)

DevTeam
MiniDSP, building a DIY DSP community one board at a time.
The administrator has disabled public write access.
Forum
Tutorials - Community powered
System equalization
Is it possible to do this?
Time to create page: 0.077 seconds