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Re: Elecraft Digest, Vol 69, Issue 53

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N8LP

Re: Elecraft Digest, Vol 69, Issue 53

I think you'll find that the FW card takes fewer resources than a USB card, at least that's what I've found as a general rule. On my system anyway, the PCI sound cards take the least resources, followed by FW, followed by USB. The same is generally true of serial ports. If you have a desktop PC, always lean towards PCI interfaces rather than USB if you have the slots to do so.

FWIW, I have 6 sound cards installed on a 2.8GHz P4 without problems, but the USB cards add about 50% to the CPU load when they're running.

Larry N8LP

Date: Sat, 30 Jan 2010 11:35:17 -0800 (PST)
From: Wes Stewart <[hidden email]>
Subject: Re: [Elecraft] [OT] PCI Express sound card for digimodes
To: [hidden email]
Cc: [hidden email], G4ILOJulian <[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=iso-8859-1

Hi Lance,

Hmmm... I don't think so. The computer has a 2.3 GHz Core2 Duo processor and 2 GB of RAM. As I said, but not clearly enough, I gave up on the LP-Pan (for now anyway) so it wasn't running. The only thing running was whichever RTTY/log software and Firefox, which I use for looking at Internet spots. Since in some of these contests I was in an unassisted category, even that wasn't always open.

Regards,

Wes

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n7ws

Re: Elecraft Digest, Vol 69, Issue 53

I'm sure you're correct, but I went to the FW card because of problems with the built-in sound card. Presumably that had the least overhead of all.

Wes N7WS

--- On Sun, 1/31/10, Larry Phipps <[hidden email]> wrote:

> From: Larry Phipps <[hidden email]>
> Subject: Re: [Elecraft] Elecraft Digest, Vol 69, Issue 53
> To: [hidden email]
> Date: Sunday, January 31, 2010, 6:56 AM
> I think you'll find that the FW card
> takes fewer resources than a USB card, at least that's what
> I've found as a general rule. On my system anyway, the PCI
> sound cards take the least resources, followed by FW,
> followed by USB. The same is generally true of serial ports.
> If you have a desktop PC, always lean towards PCI interfaces
> rather than USB if you have the slots to do so.
>
> FWIW, I have 6 sound cards installed on a 2.8GHz P4 without
> problems, but the USB cards add about 50% to the CPU load
> when they're running.
>
> Larry N8LP
>
>
>
> Date: Sat, 30 Jan 2010 11:35:17 -0800 (PST)
> From: Wes Stewart <[hidden email]>
> Subject: Re: [Elecraft] [OT] PCI Express sound card for
> digimodes
> To: [hidden email]
> Cc: [hidden email],
> G4ILOJulian <[hidden email]>
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=iso-8859-1
>
> Hi Lance,
>
> Hmmm... I don't think so. The computer has a 2.3 GHz
> Core2 Duo processor and 2 GB of RAM. As I said, but
> not clearly enough, I gave up on the LP-Pan (for now anyway)
> so it wasn't running. The only thing running was
> whichever RTTY/log software and Firefox, which I use for
> looking at Internet spots. Since in some of these
> contests I was in an unassisted category, even that wasn't
> always open.
>
> Regards,
>
> Wes
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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N8LP

Re: Elecraft Digest, Vol 69, Issue 53

My comment didn't address built-in (integrated motherboard) sound cards.
I haven't had any trouble testing them, but don't actually use them
except for desktop PC sounds and such.

73,
Larry N8LP

Wes Stewart wrote:

> I'm sure you're correct, but I went to the FW card because of problems with the built-in sound card. Presumably that had the least overhead of all.
>
> Wes N7WS
>
> --- On Sun, 1/31/10, Larry Phipps <[hidden email]> wrote:
>
>
>> From: Larry Phipps <[hidden email]>
>> Subject: Re: [Elecraft] Elecraft Digest, Vol 69, Issue 53
>> To: [hidden email]
>> Date: Sunday, January 31, 2010, 6:56 AM
>> I think you'll find that the FW card
>> takes fewer resources than a USB card, at least that's what
>> I've found as a general rule. On my system anyway, the PCI
>> sound cards take the least resources, followed by FW,
>> followed by USB. The same is generally true of serial ports.
>> If you have a desktop PC, always lean towards PCI interfaces
>> rather than USB if you have the slots to do so.
>>
>> FWIW, I have 6 sound cards installed on a 2.8GHz P4 without
>> problems, but the USB cards add about 50% to the CPU load
>> when they're running.
>>
>> Larry N8LP
>>
>>
>>
>> Date: Sat, 30 Jan 2010 11:35:17 -0800 (PST)
>> From: Wes Stewart <[hidden email]>
>> Subject: Re: [Elecraft] [OT] PCI Express sound card for
>> digimodes
>> To: [hidden email]
>> Cc: [hidden email],
>> G4ILOJulian <[hidden email]>
>> Message-ID: <[hidden email]>
>> Content-Type: text/plain; charset=iso-8859-1
>>
>> Hi Lance,
>>
>> Hmmm... I don't think so. The computer has a 2.3 GHz
>> Core2 Duo processor and 2 GB of RAM. As I said, but
>> not clearly enough, I gave up on the LP-Pan (for now anyway)
>> so it wasn't running. The only thing running was
>> whichever RTTY/log software and Firefox, which I use for
>> looking at Internet spots. Since in some of these
>> contests I was in an unassisted category, even that wasn't
>> always open.
>>
>> Regards,
>>
>> Wes
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>
>
>
>
>

Leigh L. Klotz Jr WA5ZNU

Re: Elecraft Digest, Vol 69, Issue 53

Administrator

In reply to this post by N8LP

This may be OS dependent, or it may be due to hidden sample rate conversions in the drivers.
I use the EMU-0202 with Quisk for LP-PAN and Griffin iMic with fldigi simultaneously on Linux and don't notice this level of CPU load at all.

Leigh/WA5ZNU

N8LP wrote

I think you'll find that the FW card takes fewer resources than a USB card, at least that's what I've found as a general rule. On my system anyway, the PCI sound cards take the least resources, followed by FW, followed by USB. The same is generally true of serial ports. If you have a desktop PC, always lean towards PCI interfaces rather than USB if you have the slots to do so.

FWIW, I have 6 sound cards installed on a 2.8GHz P4 without problems, but the USB cards add about 50% to the CPU load when they're running.

Larry N8LP