gobeirne

Thanks for the tips guys. I'll get to work on the state machine architecture - definitely preferable to the Big Ball of Mud

If you're planning on doing any more Labview development I recommend learning the state machine design pattern. It's a fairly simple pattern that will go a long ways towards making your code more readable and maintainable.

Hello all,

Here's a pretty clumsy VI with an incredibly messy block diagram that I've cobbled together to record wave files to disk and automatically increment the file names after each recording. It does what I want for short duration recordings, but I was wondering if there was a way of streaming the recorded sound data direct to wave file on the HDD so that we don't run out of memory for long recordings (e.g. 1 hour? 2 hours?). Oh, and there's also a little clipping-detection section in there that I had to install for external microphones that clip below the dynamic range of the sound-card input.

I'd be keen to hear the solutions people use for this sort of streaming - I'm sure there's a much better way out there! If you make any changes to the attached VI, please post them here for others to see (and in a format that can be opened by LabVIEW 8.20!)

Cheers,

Greg.

Recorder19.vi

Nice work Michael - cheers

Now we can all go have :beer:, because the code is both correct and efficient.

GL

Cheers Guillaume!

G.

Thanks very much to everyone who has replied in this thread! The proposed solutions (particularly Guillaume's) are superb and particularly elegant - cheers!!

Greg.

Excellent stuff!

It took a while for me to get it to work on my machine, though, as the "Get Time/Date string" was outputting the time as 3:49.00 p.m. instead of 15:49:00, as I presume it is set on your machine. So it would work with my settings, I altered the VI like this:

Download File:post-3796-1145504710.vi

The LEDs look superb - very modern art

Greg.

Hello all,

I was wondering if anyone knows the most efficient method of randomising a 1-D array?

I've attached the solution that I came up with, but there has to be a better way, surely!

Download File:post-3796-1145484802.vi

Many thanks,

Dr Greg O'Beirne

Christchurch, NZ

Hello folks,

I'm posting on behalf of a colleague who is asking whether it is possible to do multichannel recordings from a USB-6009 DAQ using LabVIEW 7.0. They don't have any problems with single-channel recordings, but say that while the PDF of the manual hints that multichannel recordings are possible, they can't quite figure it. They've searched the Developer Zone but have drawn a blank. Any tips that I can pass on?

Many thanks,

Greg O'Beirne