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: 202076" data-attributes="member: 830"><p>Hi Mark,</p><p></p><p>With the latest updates in Version 1.5, I've come up with some example screenshots which might help.</p><p></p><p>Lets say after filtering, you want the mid driver to have a response of LR24 HPF minimum phase at 100 Hz and LR24 LPF linear phase at 650 Hz.</p><p></p><p>In FIR Designer,</p><p>- choose the "Direct Design" mode</p><p>- set two of the filters on the Magnitude Design tab (one to Min LRHPF 4th order & another to Lin LRLPF 4th order)</p><p>- set the filter delay and length fairly large so there is negligible error from windowing (e.g. 2048 and 4096 samples)</p><p>- export (e.g. to 24 bit wav file.)</p><p></p><p>[ATTACH]202086[/ATTACH] [ATTACH]202079[/ATTACH] [ATTACH]202078[/ATTACH]</p><p></p><p>This file will be the "Target"</p><p></p><p>In FIR Designer</p><p>- In the menu, select Project -> New</p><p>- Go to the Target tab, select File and Load the above WAV file. Set the delay to minus the filter delay from Direct Design above. (e.g. -2048 samples)</p><p>- Go to the Import tab, load your measurement, then take a look at the way I've configured the settings on the all the tabs.</p><p>- The result is you have a FIR filter that will filter the driver to meet your target magnitude and phase response, including crossovers, down to -12 dB on the sides or a little lower.</p><p></p><p>[ATTACH]202083[/ATTACH] [ATTACH]202077[/ATTACH] [ATTACH]202082[/ATTACH] [ATTACH]202084[/ATTACH] [ATTACH]202081[/ATTACH] [ATTACH]202080[/ATTACH] [ATTACH]202085[/ATTACH]</p><p></p><p>I'll email you the files too.</p><p></p><p>Best,</p><p>Michael</p></blockquote><p></p>
[QUOTE="Michael John, post: 202076, member: 830"] Hi Mark, With the latest updates in Version 1.5, I've come up with some example screenshots which might help. Lets say after filtering, you want the mid driver to have a response of LR24 HPF minimum phase at 100 Hz and LR24 LPF linear phase at 650 Hz. In FIR Designer, - choose the "Direct Design" mode - set two of the filters on the Magnitude Design tab (one to Min LRHPF 4th order & another to Lin LRLPF 4th order) - set the filter delay and length fairly large so there is negligible error from windowing (e.g. 2048 and 4096 samples) - export (e.g. to 24 bit wav file.) [ATTACH=CONFIG]202086.vB5-nodeid=202086[/ATTACH] [ATTACH=CONFIG]202079.vB5-nodeid=202079[/ATTACH] [ATTACH=CONFIG]202078.vB5-nodeid=202078[/ATTACH] This file will be the "Target" In FIR Designer - In the menu, select Project -> New - Go to the Target tab, select File and Load the above WAV file. Set the delay to minus the filter delay from Direct Design above. (e.g. -2048 samples) - Go to the Import tab, load your measurement, then take a look at the way I've configured the settings on the all the tabs. - The result is you have a FIR filter that will filter the driver to meet your target magnitude and phase response, including crossovers, down to -12 dB on the sides or a little lower. [ATTACH=CONFIG]202083.vB5-nodeid=202083[/ATTACH] [ATTACH=CONFIG]202077.vB5-nodeid=202077[/ATTACH] [ATTACH=CONFIG]202082.vB5-nodeid=202082[/ATTACH] [ATTACH=CONFIG]202084.vB5-nodeid=202084[/ATTACH] [ATTACH=CONFIG]202081.vB5-nodeid=202081[/ATTACH] [ATTACH=CONFIG]202080.vB5-nodeid=202080[/ATTACH] [ATTACH=CONFIG]202085.vB5-nodeid=202085[/ATTACH] I'll email you the files too. Best, Michael [/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!