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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 domainl, which does not have to conform to the analog measurement principes and yield strict identical readings. Typical tolerances across typologies of test instruments should be expected.
Minimum System Requirements
| OS |
macOS 10.11 (El Capitan) or later
Windows 10 (build 17763) or later (except Enterprise) |
| CPU |
>2.4GHz with at least two cores
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| Sound Card |
Must have standard stereo input and stereo output, sample rate
44.1kHz ~ 96kHz (higher sample rate may also work but not
guaranteed)
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How to Install:
The software is being distributed via App Store or Microsoft Store.
The best way to download and install the app is to use the OS built-in "Store" app (such as "App Store" on macOS or "Microsoft Store" on Windows 10+). A registered user account with Apple or Microsoft will be required to start. Although a transaction can be finished outside of the Store, e.g.: via a Web browser, the actuall download/install should be completed by using the OS built-in "Store" app. So, it is recommanded to do all the procedures by using the "Store" app.
Functions and Specifications
| Generator |
21 spot sinusoidal plus white, pink noise and square wave |
| Level |
-80dB ~ +10dB RMS or Peak
(extendable to +30dB with physical input attenuator)
0dB = 1.0V (after calibration)
20Hz ~ 20kHz |
| AC Volt |
10mV ~ 300mV, 0.1V ~ 1V
1V ~ 10V (with physical input attenuator)
20Hz ~ 20kHz
Requires calibration with an AC volt-meter as a reference |
| Distortion |
THD+N
0.01% ~ 0.3%, 0.1% ~ 3%
400Hz or 1000Hz base frequency |
| Speed |
3000Hz or 3150Hz, ±3% |
| Wow & Flutter |
0.01% ~ 0.3%, 0.1% ~ 3%
Quasi-Peak (DIN 45507)
WRMS (JIS)
Peak unweighted
RMS unweighted
Spectrum display: 0.2 ~ 100Hz, with periodicity estimation |
Signal/Noise
Ratio |
-100dB ~ -10dB, IHF-A weighted |
Frequency-
Response |
10 ~ 20kHz (extendable to 40kHz upon digital sample rate)
-100dB ~ +10dB
White noise
Pink noise
Sweep frequency (asynchronous)
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| Lissajous |
Ellipse figure with time stabilizer |
| Oscilloscope |
Two channel, non-quantitative |
| Meter Ballistics |
RMS: 300mS
Peak: 10mS raise, 2000mS fall |
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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 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 decades before this app.
5. The Scope mode is a GUI add-on that displays complex measurement results in 2-dimensional plots. It is a lite graphic display without a set of pro settings.
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 standard stereo audio input (line-in) and standard stereo audio output (regardless of built-in or external) in order to allow the app functioning properly.
9. The app does not have hardware-level control on
sound device. All sound configurations (such as sample rate, bitdepth, channel map and I/O gain) must be done with the standard tools provided by the Operating System.
10. The app works the best with a standard 2-channel stereo sound card by default. But this doesn't mean that it can't work with any multi-channel PRO sound device. It is just not effortless — additional multi-channel re-mapping may be required at the Operating System level.
11.Relatively faster computer with less busy multi-tasking workload is recommended. |
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