Example Code

palm-harbor · ‎04-14-2015

Overview

This example illustrates how to play a sound file continuously, reading the sound 2D Array (DBL) in pieces, and playing each piece at a time.

Description

The equalizer upload a wav file into the memory and then convert it into 2D array data. The Front Panel contains many controls and objects in this program, one of the goal using this example is to use visual effects and play music to understand the filter options in LabVIEW; one wav file is included in the zip. For additional wav files, go to section "Aditional Instructions" to see how configure Windows Media Player [Rip Music] to create and store wav files for this equalizer. See Figure 1.

The Figure (2) shows the equalizer's Front Panel, it is recommended to use a wide monitor (22"). The Figure (3) shows the Block Diagram with minimum of subVIs in order to maximize the use of the CPU and high refresh rate in the Front Panel indicators.

Steps to Implement or Execute Code

Unzip the attached file to a temporary folder or
Move into your personal project
Open the "Sound Equalizer" folder, then
Open the LabVIEW Project "Experimental Equalizer" and run the VI called Equalizer.vi
Select from "sound files" folder a sample sound wav file using the path control on top
Press execution arrow to run the program.

Requirements

Software

LabVIEW 2014 Professional Development System (download trial)

Hardware

Minimum CPU requirements
Intel® Core™ i3-2310M Processor or better
(3M Cache, 2.10 GHz)
Installed Memory 6GB

Note: this is a real time example and requires full processor performance for better results.

Additional Instructions

Additional wav files can be created using Windows Media Player, Rip Music Options, the following image shows the options required for best quiality source of sound wav files: