Multitone generator with more entries and exits of computer speakers

I would like to add several harmonically related sinewave tones (maybe 10) and output for computer or line out speakers. Ideally want to use full range audio 44100 Hz sampling rate as well. I managed to combine two or three screws and get something that works to but lower sampling frequencies be dynamically updated if I change of frequency or phase. And to higher sampling frequency, it is not a continuous sound. It just beeps, then waits, beeps and then waits. I'm sure that oters have attempted to address this problem in the past but can't find much info. Currently using a Mac but could switch to a pc if necessary. Orientation will be most graciously accepted.

I found several things that keep all your VI to work as you wish. The attached VI works fine on my Mac.

1. I configured the sound and tone generator to use the same sampling information. Any other combination creates complications.

2. I discovered the hard way that the tone generator wants the frequency to be an integer multiple of /(# samples) (sampling frequency). It does not appear in the documentation (help file) but other combinations Sunrise errors.

3 set the input of the amplitude (not your Amplitudes) on the Generator.vi of Multitone to 1.00. This makes its compatible with the screw Sound output. It is documented in the help, but it must be read in several places and set up thepieces.

4. the reset to Multitone Generator.vi entry must be filled to deal with changes in frequencies, amplitudes or phases. I connected just a real constant for now. Later, this could be better managed by a structure of the event.

5 consider the frequency, amplitude, and phase controls at tables or a 2D array as an arbitrary number of tones can be used without changing the program.

6. a sort of waiting may be required. Without it, I sometimes got a timeout error. Several options are often different from the Structure off the diagram. The sound output wait will ensure that the time-out does not occur, but it also produces small openings in the sound. Forward (ms) works well enough, but it's a guess as to the optimal value for the wait.  After all the changes, I have madevene that the any waiting seems to work.

Lynn

Tags: NI Software

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