Line Input Test Modules

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Level / Frequency -- measure the dB level and frequency of the iAudioInterface2 line input or line output (also works with any dock input audio source).

With iAudioInterface you can measure the loaded generator output level.

Units of dBu, dBV, Vrms, Vpp, and Vave may be selected.

Included free in the AudioTools app.




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Audio Scope -- A dual-trace audio-band oscilloscope that includes auto- and single-trigger modes, variable sweep rate, and up to 128x gain. 

Includes X-Y and M-S modes, and cursor readout of frequency.

Included free in the AudioTools app.


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THD+n -- Measure Total Harmonic Distortion+noise  of the line input signal. Results are shown numerically, or may be graphed. Requires iAudioInterface. 

See our new demo video.



Available as an in-app purchase in AudioTools for $9.99.



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Amplitude Sweep -- Measure the frequency response of equipment. Requires iAudioInterface. See the demo video of this module.

Includes support for the optional Reference Curves feature.

Available as an in-app purchase in AudioTools for $14.99.



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VU Meter -- Dual display VU / PPM meters for monitoring mono or stereo level. See our new demo video.

Available as an in-app purchase in AudioTools for $2.99.