[RWP] Recommendations on a USB sound device with asio?

[Jim Snowbarger]

O jees,
In my pragmatic, old fashioned  opinion, 192KHz sampling rate is absolutely 
obscene.  Totally unnecessary, and will possibly cause performance problems 
when you stack up lots of tracks, especially if you apply effects, unless 
you've got some pretty high performance equipment.
But, to a point, what higher sampling rates get you is not wider usable 
frequency response.  They do that, but 44.1 is already as wide as most 
humans can hear, supporting a 22khz upper frequency limit.  Instead, what 
you get is less distortion at higher frequencies, less so-called aliasing 
when two higher frequency tones interact.  For example, if you combine two 
tones, say 16khz and 17khz, like might be part of a symbol hit, the two 
tones will combine to form a difference frequency when combined in a 
nonlinear fashion.  The nonlinearity comes from the fact that a 44khz 
sampling rate, sampling a 22khz tone, no matter how high the bit depth, 
doesn't give you a sign wave.  It gives you one low pulse, followed by a 
high pulse, more like a square wave.
So, due to that nonlinearity, with 44khz sampling, those two tones will 
combine to produce a phantom 1khz intermodulation tone.  With the higher 
sampling rates,  those tones are combined in a more linear fashion, which 
means the 1khz intermodulation is less.  Higher bit depth also helps 
somewhat  with that particular problem, but not in a frequency dependent 
way.  It reduces distortion across the  total spectrum.  Still, 16bit 
samples are good to one part in 65535, which is still pretty darned good. 
But, mostly , it makes for a nicer, and lower noise floor.
But, all that is mostly theoretical.  I suspect that most people, in a 
carefully controlled, double blind test, could not tell you the difference 
even between 44 and 96khz, running with normal, typical program content. 
Perhaps they could with properly chosen test tones.  But, who the heck 
grooves on test tones.  Oh, Patrick,  I forgot.  <grin>

But, wasn't this mailing list about reaper?



----- Original Message ----- 
From: "Jes" <theeternalkid at gmail.com>
To: "Reapers Without Peepers" <rwp at reaaccess.com>
Sent: Thursday, August 12, 2010 5:08 PM
Subject: Re: [RWP] Recommendations on a USB sound device with asio?


>I looked at zzounds reviews of both the M-audio fasttrack pro and the Emu 
>0404, and it seems that the Emu 0404 is easier to set up and it goes up to 
>192 khz. While the m-audio fasttrack pro looks okay, it only goes to 96 
>khz. Thinking of going with Emu 0404.
> Jes
>
> On Aug 11, 2010, at 9:16 PM, Derek Lane wrote:
>
>> I'd start with the M-Audio fasttrack pro, look at reviews and similar 
>> interfaces.
>> That's the best for the money I personally have seen given you want USB.
>> ----- Original Message ----- From: "Jes" <theeternalkid at gmail.com>
>> To: "Reapers Without Peepers" <rwp at reaaccess.com>
>> Sent: Wednesday, August 11, 2010 2:03 PM
>> Subject: Re: [RWP] Recommendations on a USB sound device with asio?
>>
>>
>>> Okay Derek, which usb audio interface would you recommend then?
>>> Jes
>>>
>>> On Aug 10, 2010, at 1:36 PM, Derek Lane wrote:
>>>
>>>> wonder if the m-audio fast track pro would do it?
>>>> Honestly unless you're tracking several people live in 1 pass, multiple 
>>>> ins and outs arn't as critical as a clean signal path would be, for 
>>>> example.
>>>> So, if you have the ability to play keyboard  and guitar at the same 
>>>> time, and need those discrete for later mixing, then you'd be set with 
>>>> just 2 outputs.  This also holds true with the more practical solution 
>>>> of overdubbing 1 part, then adding the  others.
>>>>
>>>> ----- Original Message ----- From: "David Engebretson Jr." 
>>>> <d.engebretson at comcast.net>
>>>> To: "Reapers Without Peepers" <rwp at reaaccess.com>
>>>> Sent: Tuesday, August 10, 2010 1:05 PM
>>>> Subject: Re: [RWP] Recommendations on a USB sound device with asio?
>>>>
>>>>
>>>>> Reaper doesn't play nice with the Presonus AudioBox.  Just as an FYI.
>>>>>
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