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
Test Drive
Fulcrum Acoustic FA12, FA15 and FA28 (1 of 4)
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="Langston Holland" data-source="post: 49774" data-attributes="member: 171"><p>Re: Fulcrum Acoustic FA12, FA15 and FA28 (4 of 4)</p><p></p><p></p><p></p><p>Hi Jason:</p><p></p><p>Your observations support a theory I've had about the latency issue, but I don't have enough experience to nail it down. I cannot hear any latency issues with the FA series driven by the Powersoft DSP amps. The Powersoft amps have about 1/2 the latency of the ITech HD's with the Fulcrum FIR coefficient presets, but this shouldn't be necessary and hopefully Crown can provide a fix soon. While the Powersoft amps are native 96kHz animals, the HD's can switch between 48kHz and 96kHz, the latter cutting latency in half - but that's not the end of the story.</p><p></p><p>I measured about 5ms latency in the Powersoft amps. The Fulcrum L1 presets only add about 1.7ms to that since no FIR crossover filters are involved. It requires at least 5ms additional delay to implement usable FIR crossover filters, but not so for time correction such as done by the Fulcrum process (or All-Pass filters BTW). The difficulty with the HD amps that I learned from Rich is that it appears Crown apportioned an additional 5ms or so crossover latency into the amp when importing FIR coefficients <u>even if no crossovers are involved</u>.</p><p></p><p>Whoops.</p><p></p><p>I'd be very surprised if someone could detect the latency with a Powersoft DSP amp using the Fulcrum L1 presets.</p><p></p><p>---</p><p></p><p>On the idea about eliminating the D/A/D process from console to amps by driving them digitally, I'm confident that would help with a console that does 96kHz natively. I don't have the knowledge to comment on what the latency issues would be if the console runs at 48kHz with the Powersoft DSP amps converting to 96kHz internally. I know Powersoft knows the answer to this. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Langston Holland, post: 49774, member: 171"] Re: Fulcrum Acoustic FA12, FA15 and FA28 (4 of 4) Hi Jason: Your observations support a theory I've had about the latency issue, but I don't have enough experience to nail it down. I cannot hear any latency issues with the FA series driven by the Powersoft DSP amps. The Powersoft amps have about 1/2 the latency of the ITech HD's with the Fulcrum FIR coefficient presets, but this shouldn't be necessary and hopefully Crown can provide a fix soon. While the Powersoft amps are native 96kHz animals, the HD's can switch between 48kHz and 96kHz, the latter cutting latency in half - but that's not the end of the story. I measured about 5ms latency in the Powersoft amps. The Fulcrum L1 presets only add about 1.7ms to that since no FIR crossover filters are involved. It requires at least 5ms additional delay to implement usable FIR crossover filters, but not so for time correction such as done by the Fulcrum process (or All-Pass filters BTW). The difficulty with the HD amps that I learned from Rich is that it appears Crown apportioned an additional 5ms or so crossover latency into the amp when importing FIR coefficients [u]even if no crossovers are involved[/u]. Whoops. I'd be very surprised if someone could detect the latency with a Powersoft DSP amp using the Fulcrum L1 presets. --- On the idea about eliminating the D/A/D process from console to amps by driving them digitally, I'm confident that would help with a console that does 96kHz natively. I don't have the knowledge to comment on what the latency issues would be if the console runs at 48kHz with the Powersoft DSP amps converting to 96kHz internally. I know Powersoft knows the answer to this. :) [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Pro Audio
Test Drive
Fulcrum Acoustic FA12, FA15 and FA28 (1 of 4)
Top
Bottom
Sign-up
or
log in
to join the discussion today!