ampMeasure 1.0.2 is now live on the Mac App Store, as a free update for existing users.
What’s new
- External source mode: measure DACs and players running on their own clock. The tone is found automatically, with power averaging and a new Blackman-Harris 7 window.
- New readouts: SINAD, ENOB (optionally referenced to full scale), and absolute noise in µVrms / dBV. The former “SNR” is now labelled as what it is: noise relative to the fundamental.
- THD: harmonic range up to H22 (REW’s default), harmonics at the noise floor marked, and harmonic labels in the spectrum.
- Averaging: up to 256 averages with “Stop when averaged”, and an auto-fitting Y axis.
- Report PNG: settings, spectrum and every channel’s readouts on one page, with its own light/dark setting.
- Input protection: a hint with a one-click fix when the protection relay keeps cycling.
- Correct noise at 96/192 kHz: a DC offset no longer leaks into the measurement band.
- automatic reconnect after unplugging;
- a working LINK LED;
- silent connect, with the relays parked safely on quit;
- range changes go to the QA403 immediately;
- a timestamped range log in the Probe tab for matching relay clicks.
Thank you to the beta testers.
Coming in 1.1
- SNR referenced to full scale (unweighted and A-weighted), the way ASR and AP publish it.
- Dynamic range per AES17 at −60 dBFS.
- dBFS readouts and a noise floor in nV/√Hz.
- A power readout for amplifier testing.
After that: selectable FFT length up to 256k.
Feedback and bug reports always welcome!
Link to App Store: ampMeasure App - App Store