NAK T-100 is a lightweight and all-inclusive audio analyzer for inspecting analog audio devices on computer. It is capable of completing 7+ conventional audio measurements in a single setup without swapping a stack of physical instruments. This makes it an agile tool to quickly check whether a given audio device performs to its specifications. Or during a service/repair/modify project, this is a less overkill and more cost-effective tool for conducting general audio measurements on desk top. Some of the key functions are specifically optimized for tuning analog tape players/recorders.

The app features modern DSP core with traditional analog skin. It adopts the "Skeuomorphism" design philosophy to offer era-specific operational experience in working with analog audio devices. However, the underlaying engine works purely from digital domain after all, which does not have to follow the analog measurement principles and yield strict identical readings. Typical tolerances across typologies of test instruments should be expected.

Features and Specifications
21 spot sinusoidal plus pink
-80dB ~ +10dB
(extendable to +30dB with physical input attenuator),
RMS or peak, 0dB = 1.0V (after calibration)
[AC Volt]
10mV ~ 300mV, 0.1V ~ 1V,
1V ~ 10V (with physical input attenuator)
20Hz ~ 20kHz
Requires calibration with reference AC volt-meter
0.01% ~ 0.3%, 0.1% ~ 3%
3000Hz/3150Hz ±3%
[Wow & Flutter]
0.01% ~ 0.3%, 0.1% ~ 3%
Quasi-Peak (2-sigma) DIN 45507
WRMS (2-second moving window) DIN 45507
Peak unweighted
RMS unweighted
[Signal/Noise Ratio]
-100dB ~ -10dB
IHF-A weighted
[Frequency Response]
20 ~ 20kHz (extendable to 26kHz at 96kHz sample rate)
-100dB ~ +10dB
Gaussian white noise
Pink noise
Sweep frequency (asynchronous)
Ellipse figure with time stabilizer
Two channel, non-quantitative
[Meter Ballistics]
RMS: 300mS (capacitive)
Peak: 10mS raise, 2000mS fall (capacitive)

Please note:
1. This app is by no means a replacement of laboratory grade instrument.
2. This app is intentionally designed in favour of simplicity and convenience without excessive configurability.
3. This app operates in two switchable modes: Basic and Scope.
4. The Basic mode is the primary working mode. Its UI panel may be unfamiliar to new users at first. But the same ergonomics has been repeatedly proven in the former practices.
5. The Scope mode is a GUI add-on that displays complex measurement results in 2-dimensional plots. It is a lite graphic console without a set of pro implications.
6. The specifications may vary depending on actual sound card used.
7. Calibration will be needed prior to working with a specific audio device on a specific computer.
8. The computer must have stereo audio input (line-in) and stereo audio output (regardless of built-in or external) in order to allow the app functioning properly.
9. Relatively faster computer with less busy multi-tasking workload is recommended.

What’s New

Version 1.0.1

Fixed minor display problems.

App Privacy

The developer, Chen Wang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer's privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


Chen Wang
3.5 MB

OS X 10.11 or later, 64-bit processor



Age Rating


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    With Family Sharing set up, up to six family members can use this app.

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