七麦数据

For music professionals, audio engineers, sound technicians, sound system installers and audio students.

Equally great both for quick reference and for long - term live spectra display. Supports multiple FFT sizes, adjustable averaging time and bandwidth, selectable mic input, selectable plot color.

Main features:
- vide range of frequency resolutions & averaging times
- scalable & movable plot that animates smoothly
- uses the whole audio range even on built-in mic
- selectable input source/mic or external device


With Spectrum-Eye, You can:

- monitor sound quality on concerts,
- ring out feedback in stage monitors,
- find resonances in acoustic environments,
- evaluate spectral properties of audio material in studio,
- develop Your hearing skills (frequency - aware hearing practice),
- detect problematic frequencies in speech/music,
- tune up car sound systems

Supports external microphones & audio interfaces compatible with Your iPad or iPhone. Currently uses sum of input channels 1 & 2.

Allows selecting preferred iPad mic when no external audio input is connected. You will discover how many mics and mic directivity configurations Your device has.

Uses iOS "Audio measurement mode" to bypass built-in mic processing. This setting too can be switched on/off for comparison.

Nominal sampling rate, Hz: 48000
Measurement frequency range, Hz: 8...22000
Measurement magnitude range, dB: 144dB
Magnitude precision, dB: ± 0.2
Frequency resolution (bandwidth):
- 1 octave
- 1/3
- 1/6
- 1/12
- 1/24
- 1/48
- 1/96 (iPad only)

App also employs pink noise generator for cases where You will use it with external audio interfaces. You can use the app as a pink noice generator even when screen is off.

Basic usage tips:

Re-position plot by sliding on scales (frequency scale for moving horizontally, dB scale for moving vertically). Scale the plot horizontally or vertically using two finger pinch.

Slide Your finger over the plot to move the cursor and see it's position in Hz and dB.

You can also find some tweaks and fine - tunings in Settings, accessible using three-dot button on top left.

The app is in active development, Your suggestions welcome!

For music professionals, audio engineers, sound technicians and audio students.

Best on iPad.

Equally great both for quick reference and for long - term live spectra display. Supports multiple FFT sizes, adjustable averaging time and bandwidth, selectable mic input, selectable plot color.

With Spectrum-Eye, You can:

- monitor sound quality on concerts,
- ring out feedback in stage monitors,
- find resonances in acoustic environments,
- evaluate spectral properties of audio material in studio,
- develop Your hearing skills (frequency - aware hearing practice),
- detect problematic frequencies in speech/music.

Supports external microphones & audio interfaces compatible with Your iPad or iPhone. Currently uses sum of input channels 1 & 2 to calculate the spectrum.

Allows selecting preferred iPad mic when no external audio input is connected. You will discover how many mics and mic directivity configurations Your device has.

Uses iOS "Audio measurement mode" to bypass built-in mic processing. This setting too can be switched on/off for comparison.

Nominal sampling rate, Hz: 48000
Measurement frequency range, Hz: 8...22000
Measurement magnitude range, dB: 144dB
Magnitude precision, dB: ± 0.2
Frequency resolution (bandwidth):
- 1 octave
- 1/3
- 1/6
- 1/12
- 1/24
- 1/48
- 1/96 (iPad only)

Bandwidth corresponds to actual resolution above certain frequency indicated by "Interpolated below ..." readout in Settings. This parameter depends on current resolution and FFT size.

Resolution on frequencies lower than "Interpolated below" is lower than plot bandwidth and, as name implies, below this frequency the plot is interpolated to get smooth results.

App also employs pink noise generator for cases where You will use it with external audio interfaces. You can use the app as a pink noice generator even when screen is off.

Re-position plot by sliding on scales (frequency scale for moving horizontally, dB scale for moving vertically). Scale the plot horizontally or vertically using two fingers.

Slide Your finger over the plot to see current cursor position in Hz and dB.

You can also find some tweaks and fine - tunings in Settings, accessible using three-dot button on top left.

You are welcome for any suggestions and notes, send them via in-app feedback form!

For music professionals, audio engineers and pro audio students.
Best on iPad.

Equally great both for quick reference and for long - term live spectra display. Supports multiple FFT sizes, adjustable averaging time and bandwidth, selectable mic input, selectable plot color.

With Spectrum-Eye, You can:

- monitor sound quality on concerts,
- ring out feedback in stage monitors,
- find resonances in acoustic environments,
- evaluate spectral properties of audio material in studio,
- develop Your hearing skills (frequency - aware hearing practice),
- detect problematic frequencies in speech/music.

Supports external audio interfaces compatible with Your iPad or iPhone. Currently uses sum of input channels 1 & 2 to show the spectrum.

Allows selecting preferred iPad mic when no external audio interface is connected.

Uses iOS "Audio measurement mode" which bypasses built-in mic processing. This setting too can be switched on/off for comparison.

Spectrum bar plot has selectable bandwidth:

- 1 octave
- 1/3
- 1/6
- 1/12
- 1/24
- 1/48
- 1/96 (iPad only)

Bandwidth corresponds to actual resolution above certain frequency ("Interpolated below ...") which depends on current resolution and FFT size and can be found in settings below "FFT Size".

Resolution on frequencies lower than "Interpolated below" is lower than plot bandwidth and the plot is interpolated to get smooth results.

App also employs pink noise generator for cases where You will use it with external audio interfaces. You can use the app as a pink noice generator even when screen is off.

Re-position plot by sliding on scales (frequency scale for moving horizontally, dB scale for moving vertically). Scale the plot horizontally or vertically using two fingers.

You are welcome for any suggestions and notes, send them via in-app feedback board!