Log in
Register
Home
Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
News
Members
Current visitors
New profile posts
Search profile posts
Features
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Menu
Install the app
Install
Reply to thread
Home
Forums
Pro Audio
Varsity
FIR filters
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="Michael John" data-source="post: 201750" data-attributes="member: 830"><p>I agree, what's important is how the drivers interact, especially beyond the crossover frequency, and so it's important to make driver-unique adjustments so that they play nicely together. Whether that's done using independent FIR's (plus crossovers) for each driver, or done with different IIR's (EQ and crossovers) on each driver + a global FIR correction filter, shouldn't make a difference. The smarts are in how we make and interpret the driver measurements.</p><p></p><p>If we both phase match two drivers (or horn and driver) and suppress out of band oddities using IIR filters independently for each driver, and combine this with a FIR filter to linearise the phase of the combination, the result is the same (assuming the same magnitude profiles for each driver) as linearising the phase of each driver independently using FIR filters plus linear phase crossovers. The workflow of one may be easier than the other, depending on experience and taste. In both cases, temporal issues are addressed by the phase linearisation in the FIR. Remember, phase and time are duals of each other.</p></blockquote><p></p>
[QUOTE="Michael John, post: 201750, member: 830"] I agree, what's important is how the drivers interact, especially beyond the crossover frequency, and so it's important to make driver-unique adjustments so that they play nicely together. Whether that's done using independent FIR's (plus crossovers) for each driver, or done with different IIR's (EQ and crossovers) on each driver + a global FIR correction filter, shouldn't make a difference. The smarts are in how we make and interpret the driver measurements. If we both phase match two drivers (or horn and driver) and suppress out of band oddities using IIR filters independently for each driver, and combine this with a FIR filter to linearise the phase of the combination, the result is the same (assuming the same magnitude profiles for each driver) as linearising the phase of each driver independently using FIR filters plus linear phase crossovers. The workflow of one may be easier than the other, depending on experience and taste. In both cases, temporal issues are addressed by the phase linearisation in the FIR. Remember, phase and time are duals of each other. [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Pro Audio
Varsity
FIR filters
Top
Bottom
Sign-up
or
log in
to join the discussion today!