NIDAQmx: how to simultaneously acquire channels at different sample rates?

I have a PCI-6229 (M-series card). It has an advertised throughput of 250K/sec. I'd like to configure the card to simultaneously sample eight (8) AIN channels at 25K/sec, and none (9) AIN channels at 5K/sec. This results in a usage of about 245K/sec out of the available 250K/sec, which seems "do-able". But how do you setup the task(s) in NIDAQmx to do accomplish this? Are there any examples (I'm using the ANSI-C API) which illustrate how to do this?
I can't just set all 17 channels to 25K (and decimate the data for the slow channels), because there is not enough bandwidth. I was also unable to setup two tasks (one for high-speed, one for low-speed) because I get an error when I start the
second task. Is there another way to accomplish this?
Thanks in advance for any help!

Greetings,
I would take a look at this KnowledgeBase that describes the process between doing this task.
http://exchange.ni.com/servlet/Redirect?id=12678799
Unfortunately, a text base example program does not currently exist, but if you have questions we'll do our best to help you out.
Regards,
Anuj D.

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DaleChamberlain wrote: Anyone know of how I can change these settings to get Audition to agree with the device settings?
I'm afraid that life is nowhere near that simple. The main issue here is that Audition, in common with most audio software, uses a driver system called ASIO to talk to the sound device - this cuts out a lot of the OS and reduces the latency of the system considerably. There are several problems with ASIO though - the first being that it only supports a single device per system (or sometimes multiple identical devices if the manufacturer can make them look like a single device), and with software designed to use this driver, then to use any other driver (like a native Windows one) you have to use a converter stage like ASIO4ALL. This will convert the ASIO streams to WDM, and let you use multiple sound devices - but with increased latency.
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There are a few ways to look at this.
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3) There are a few other options for handling this, such as EXS24, which automatically handles SRC.
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NIDAQmx: how to simultaneously acquire channels at different sample rates?

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