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Android Audio Oscilloscope
- Timebase 0.1 ms - 0.5 sec
- Sync control
- Single shot
- Storage
- Index
- Spectrum
The icons on the toolbar are, from left to right:
- Bright line - Defeats the sync and single shot
- Single shot - Touch the trigger icon to get a trace
- Trigger - Touch for a trace
- Timebase - Drops a submenu of timebase timings
- Storage - Does not clear the display between traces
- Clear - Clears the display
- Left - Moves the trace to the left
- Right - Moves the trace to the right
- Start - Moves the trace to the start
- End - Moves the trace to the end
- Spectrum - Spectrum display
- Settings - Input source, Screen and About items
The last two or six items may be on the menu, depending on the size of the device.
Touching the display will produce a vertical index line, which will show the value at that point. The value is arbitrary, as there is automatic gain control on the audio input so the trace does not get clipped. The position of the index can be finely adjusted by rolling the finger tip. The index can be removed by swiping it off to the left, or touching the Start icon.
Touch the left edge Y scale to adjust the sync level. A pointer will appear which can be adjusted by sliding up and down. Touch the start icon to reset the level to zero.
In single shot mode the timebase may be changed to zoom in and pan left and right using the right and left icons.
The spectrum display shows a spectrum with a logarithmic frequency scale. An index line shows the dominant frequency in the input. The frequency and input level is also displayed in the toolbar. To lock the display, touch spectrum display or the lock icon in the toolbar. Touch it again to release the lock. To display the help screen, touch the help icon.
The audio input source may be selected. Some of the selections will not be available, depending on the device. The screen option will stop the screen turning off. The about item shows the version and copyright.