15 DSP = 14 DSP ?

A place to talk about whatever Scope music/gear related stuff you want.

Moderators: valis, garyb

Post Reply
nebelfuerst
Posts: 479
Joined: Tue Jun 23, 2009 10:55 am

15 DSP = 14 DSP ?

Post by nebelfuerst »

I'm owner of 14 DSP and 15 DSP cards.
The 15 DSP-card has a DSP soldered close to the pci bridge, while the 14 DSP has an empty socket on the pcb here.

Using scope 4.5 all cards are shown as 14 DSP.
Is there a reason for that DSP to be "hidden" ?
\\\ *** l 0 v e | X I T E *** ///
User avatar
valis
Posts: 7306
Joined: Sun Sep 23, 2001 4:00 pm
Location: West Coast USA
Contact:

Re: 15 DSP = 14 DSP ?

Post by valis »

On those cards the DSP chip is (I believe, if memory serves) used to load core components of the "Scope Operating System" code that coordinates everything happens after. The chip was added to ease certain resource usage situations (again from memory, defer to gary on this) so that you had more of your declared DSP usage at your disposal.

Proposition: It was an improvement in the design because people became more aware of how the sync & async numbers lined up with device usage, and wondered where the 'extra dsp usage' was going on such an expensive card.
User avatar
Bud Weiser
Posts: 2684
Joined: Tue Sep 14, 2010 5:29 am
Location: nowhere land

Re: 15 DSP = 14 DSP ?

Post by Bud Weiser »

valis wrote: Wed Dec 22, 2021 1:54 pm The chip was added to ease certain resource usage situations ...
That sounds like there was a chip added later improving something.
Maybe I´m wrong,- but I think one of the chips was ditched later,- going from "Power Pulsar" (15DSP) to "Scope Pro" (14 DSP),- saving costs and when it was possible to get same results,- possible by optimized software,- no ?

I also remember, earlier 15DSP cards were "gen #1" cards w/ 3 ADAT I/Os,- while "gen 2" cards w/ only 2 ADAT I/Os might have been fine w/ 15 and 14 DSPs onboard.
I own one of these "gen2" 15 DSP cards going down to less than 13ms of ASIO latency already (7ms ULLI @44.1K SR).
It has the "Classic20" plate" w/ just "only" 2 ADAT I/Os.
I understood, 15DSP cards w/ 3 ADAT I/Os were the "gen #1" cards.

:)

Bud
User avatar
valis
Posts: 7306
Joined: Sun Sep 23, 2001 4:00 pm
Location: West Coast USA
Contact:

Re: 15 DSP = 14 DSP ?

Post by valis »

Ah you're correct, I recalled it in reverse. Thanks Bud
User avatar
garyb
Moderator
Posts: 23248
Joined: Sun Apr 15, 2001 4:00 pm
Location: ghetto by the sea

Re: 15 DSP = 14 DSP ?

Post by garyb »

3x ADAT i/o were available with gen2 cards.

14 and 15 dsp cards are more or less equivalent. removing a dsp saved money, but didn't affect performance, so....
the 15th dsp was mainly used for card management.
User avatar
valis
Posts: 7306
Joined: Sun Sep 23, 2001 4:00 pm
Location: West Coast USA
Contact:

Re: 15 DSP = 14 DSP ?

Post by valis »

I'm amazed, we found an error in my memory. I must not be uploaded into the VR sim yet after all.
User avatar
Bud Weiser
Posts: 2684
Joined: Tue Sep 14, 2010 5:29 am
Location: nowhere land

Re: 15 DSP = 14 DSP ?

Post by Bud Weiser »

garyb wrote: Wed Dec 22, 2021 6:03 pm 3x ADAT i/o were available with gen2 cards.
So, ULLI is the only indicator ?

@44.1K SR

13ms = Gen #1
7ms = Gen #2

or are there more attributes ?

:)

Bud
User avatar
garyb
Moderator
Posts: 23248
Joined: Sun Apr 15, 2001 4:00 pm
Location: ghetto by the sea

Re: 15 DSP = 14 DSP ?

Post by garyb »

the cards are different shapes, but unless you have cards to compare, it's hard to tell. date of production might also tell, but ULLI and PCI capacity are easy tells.
User avatar
Bud Weiser
Posts: 2684
Joined: Tue Sep 14, 2010 5:29 am
Location: nowhere land

Re: 15 DSP = 14 DSP ?

Post by Bud Weiser »

garyb wrote: Thu Dec 23, 2021 7:48 am the cards are different shapes, but unless you have cards to compare, it's hard to tell. date of production might also tell, but ULLI and PCI capacity are easy tells.
Thank you, Gary !

:)

merry x-mas !
User avatar
garyb
Moderator
Posts: 23248
Joined: Sun Apr 15, 2001 4:00 pm
Location: ghetto by the sea

Re: 15 DSP = 14 DSP ?

Post by garyb »

likewise!
Post Reply