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ARSCLIST  August 2011

ARSCLIST August 2011

Subject:

Re: digital input sound card recommendation

From:

David Seubert <[log in to unmask]>

Reply-To:

Association for Recorded Sound Discussion List <[log in to unmask]>

Date:

Wed, 10 Aug 2011 22:23:27 -0700

Content-Type:

text/plain

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text/plain (129 lines)

Thanks for all the input. I'll check out the Lynx and RME cards.

David

On Aug 9, 2011, at 6:30 PM, Konrad Strauss wrote:

> +1 on the Lynx cards. We have six AES16 that have been in service  
> for four
> years now. As with all computer systems they require tweaking from  
> time to
> time as the OS is updated, but I've found maintenance to be pretty
> straight-forward.
>
> To answer a couple of Tom's points below, jitter is not a issue in
> digital-to-digital data flow. This is called interface jitter, and  
> as long
> as the samples arrive at their destination intact no harm is done.  
> (The he
> other kind of jitter is called sampling jitter, it happens during  
> ADC and
> can cause major problems) So Firewire and USB interfaces are not
> necessarily bad, it really depends on the implementation.  
> Personally, I
> dislike the cables and connectors, especially Firewire. The whole  
> system
> seems dodgy to me. You can also run into problems if you want to use
> Firewire/USB DAC and ADC units from different manufacturers, often  
> this is
> impossible because of incompatible drivers. I much prefer to stick  
> with
> AES.
>
> The interaction between audio and video subsystems is probably  
> caused by
> an IRQ conflics. My memory is a little hazy since I haven't had to  
> deal
> with this for a few years, but occasionally PCI slots will share the  
> same
> IRQ address so if the audio and video card are in slots that share,
> glitches can be put into the audio stream when minimizing windows or a
> monitor going to sleep. Usually the recommendation is that if this  
> happens
> try swapping PCI slots. I think that in Windows 7 you can manually  
> assign
> IRQ addresses but like I said I haven't had to deal with this for a  
> while
> so I may be misremembering.
>
> -- 
> Konrad Strauss
> Director of Recording Arts, Professor of Music
> Indiana University Jacobs School of Music
> http://mypage.iu.edu/~kstrauss
> http://www.music.indiana.edu/departments/academic/recording-arts/
>
>
>
>
>
>
> On 8/9/11 1:46 PM, "Tom Fine" <[log in to unmask]> wrote:
>
> Hi David:
>
> That's a real bummer. Those are my front-line ADC's too.
>
> There has been much progress in recent years with external ADC's.  
> However,
> I keep reading articles
> and papers about the USB connection not being ideal due to jitter and
> latency issues. And yet,
> firewire keeps getting de-emphasized by hardware manufacturers. I'm  
> also
> not sure what role video
> circuitry plays in a modern Windows system. Even thru XP, there was  
> some
> interaction between digital
> audio and the video subsystem, I'm not expert enough to discuss  
> details
> but there are articles and
> white papers out there.
>
> If you're doing your analog-to-digital conversion externally and then
> "recording" an AES/EBU stream,
> it seems like you could use a very simple interface, but again I'm not
> sure how much clocking and
> latency matter in that setup.
>
> I've had some CardDeluxe cards since 1999 and they still work fine.  
> Why
> not just recycle them as you
> upgrade computers, or are you building out more workstations and now  
> need
> a new way to skin the cat?
>
> -- Tom Fine
>
> ----- Original Message -----
> From: "David Seubert" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, August 09, 2011 1:38 PM
> Subject: [ARSCLIST] digital input sound card recommendation
>
>
>> This discussion has come up repeatedly over the years but I just  
>> learned
>> that the Digital Audio
>> Labs CardDelux has been discontinued. I'm not sure why they have been
>> discontinued, but we got a
>> call from the manufacturer who said that they are "obsolete." We have
>> long used their cards (we
>> are a PC shop) and I need to spec out another PC-based audio
>> workstation. I use the CardDelux for
>> the AES/EBU digital inputs.
>>
>> What are people using for digital input from an external ADC these  
>> days?
>> Is there an equivalent
>> sound card to the DAL card with AES/EBU digital inputs? I know some  
>> ADCs
>> offer firewire/USB
>> outputs, but I haven't really explored that.
>>
>> Please send any suggestions to me on or off list.
>>
>> David Seubert
>> UCSB
>>

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