Stimulus

Tones, sweeps, noise, GLITS

$4.99

A four-generator test signal rack for live sound: tones, sweeps, harmonics, noise, GLITS and polarity pops, plus period-matched measurement signals. Stimulus is a test signal rack for live sound engineers. Four generators, a proper master section, and measurement signals that behave the way your analyzer expects. GENERATORS - Tone: sine from 10 Hz to 22 kHz with a log slider, typed entry, and keyboard nudge (1 percent steps, 10 percent with Shift). - Sweep: log or linear, any range in either direction, continuous or stepped in 1/3-octave dwells, one-shot or looped, with return. Hold freezes the sweep at its current frequency and lets you scrub the held tone. - Harmonics: a fundamental with seven partials (f/4 to 5f) on faders, for exercising a rig with controlled harmonic content. - Noise: pink, red/brown, or white, full range or band-limited to 1 octave or 1/3 octave around a centre frequency. - Identify: GLITS (Graham's Line Identification Tone System) for stereo left/right checks, and positive-going polarity pops in click, full-range, and sub widths. - Measure: pseudorandom pink noise period-matched to your analyzer's FFT frame (32K, 64K, or 128K), and a cycle-synchronised log sweep. Both loop seamlessly; export writes exactly one frame for analyzer playback. RACK AND MASTER - Up to four generators at once, each with level, left/right/both routing, polarity invert, mute, exclusive solo, and click-free fade in and out. - Master level with a hard limiter at -3 dBFS, a 20 dB dim for talking over the rig, master fade in and out in seconds, and an auto-stop timer with optional repeat. - Stereo peak meters that follow every fade. EXPORT - Render any generator or the whole mix to WAV or AIFF at 44.1, 48, or 96 kHz for playback machines and test rigs. SAFETY - New generators always start at -20 dBFS. Nothing in the app defaults loud. One purchase covers Mac and iPad.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, BSK Apps, 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

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • BSK Apps
    Size
    • 3.6 MB
    Category
    • Music
    Compatibility
    Requires iPadOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • Copyright © 2026 BSK Apps. All rights reserved.
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by BSK Apps