Audio data to be acquired at 192khz

Question

hi ...
well i  have made a VI to acquire  audio data  and then write it to a file to furthur process it. the problem is that  when i send  stram of audio data upto 48 khz the data is captured continuously, but if i try to  send a stream of 64khz or 192 khz the data is acquired but for a little time. i want to acquire data of 192khz stream continuously.  i m using labview 6.2 and dio32hs card.
i want to acquire data at 192khz for atleast 6 min continuously.
is it possible???
please help..
thanx and regards
vivek modgil

Answer 1

Look at the producer consumer template for multithreading.
Essentially what happens if you use a simple model like
Initialize()
DaqLoop
   Read()
   Process()
   Display()
   Save()
LOOP
is that if the saving and/or sace takes too long the next itteration of read will have caused a buffer over run in the daq task.  This is more evident in the faster Acquisition rates.  Making the buffer larger only delays the onset of this event.
A better model is (Threads are just parallel loops)
Thread 1 (Producer):{
Initialize DAQ()
DaqLoop
   Read DAQ data()  //all data avaliable.
   send data to a Queue
}Loop(until done)
Kill queue();
Thread 2 (Consumer):
DataLoop
  Wait for data at queue; // put in some timeout  ie 100ms 
  If new data-> Process() Display(); Save();
}Loop(While queue is valid)
This is just a starting point.  Look at the producer/consumer model.
This ensures that the DAQ loop will (should) never overrun and the consumer loop will attempt to keep up with the data.  Saving data to file is slow so do this post acquisition if possible (IE build array in memory).
Paul 
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA