Controls for Graph Displays, Keyboard Input, and MIDI (DSP Module)
The DSP Module includes the following controls you can use with DSP VIs. You can find these controls on the Modern»Mixed Target palette.
- 2D Spectrograph—Appears as an intensity chart in a front panel window. The 2D Spectrograph control displays two-dimensional data as a spectrograph of a signal.
- Keyboard Input—Appears as a custom text control in a front panel window. Use the Keyboard Input control to type text using the computer keyboard so that the DSP target can process the text. The output of this control is the ASCII character value for the last keyboard entry.
- MIDI Read—Appears as a custom numeric control on a front panel window. This control works with the MIDI-OX software. The MIDI Read control reads in MIDI data for any MIDI file the MIDI-OX software plays. The output of the MIDI Read control is an array of five notes that represent the musical content of a MIDI file that MIDI-OX generates.
- Multipurpose Display—Appears as a graph display in a front panel window. The display provides a method of displaying waveform data in both the time and frequency domains. Click the tabs to switch between time and frequency domains. You can select user options including manual or auto-scaling of the y-axis and cursor readout of waveform data.
- Sketchwave—Appears as a graph display in a front panel window. With the Sketchwave control you can generate an arbitrary custom waveform by using the computer mouse to drag the shape of the waveform directly in the graph display. Click the buttons on the Sketchwave control to use pre-defined waveform signals, including sine waveform, triangle waveform, positive ramp, negative ramp, and empty waveform.
- Receive Character—Allows for a scrolling history of up to twenty letters of the alphabet. The letters scroll from right to left until the characters scroll off the left side of the indicator. Input values for the letters a to z range from 10 to 35, where 10 = a and 35 = z. Use a value of 36 for a space. Separate identical consecutive input values with a value of zero. For example, to scroll the word hello on the indicator, use the following input sequence: 17 14 21 0 21 24.