Home  /  Music & Audio Apps  / Impulse Response
Impulse Response Application icon

Impulse Response 1.8

115 KB / 10+ Downloads / Rating 3.9 - 26 reviews


See previous versions

Impulse Response, developed and published by jjbunn, has released its latest version, 1.8, on 2020-08-01. This app falls under the Music & Audio category on the Google Play Store and has achieved over 1000 installs. It currently holds an overall rating of 3.9, based on 26 reviews.

Impulse Response APK available on this page is compatible with all Android devices that meet the required specifications (Android 2.3+). It can also be installed on PC and Mac using an Android emulator such as Bluestacks, LDPlayer, and others.

Read More

App Screenshot

App Screenshot

App Details

Package name: com.julian.apps.ImpulseResponse

Updated: 5 years ago

Developer Name: jjbunn

Category: Music & Audio

New features: Show more

Installation Instructions

This article outlines two straightforward methods for installing Impulse Response on PC Windows and Mac.

Using BlueStacks

  1. Download the APK/XAPK file from this page.
  2. Install BlueStacks by visiting http://bluestacks.com.
  3. Open the APK/XAPK file by double-clicking it. This action will launch BlueStacks and begin the application's installation. If the APK file does not automatically open with BlueStacks, right-click on it and select 'Open with...', then navigate to BlueStacks. Alternatively, you can drag-and-drop the APK file onto the BlueStacks home screen.
  4. Wait a few seconds for the installation to complete. Once done, the installed app will appear on the BlueStacks home screen. Click its icon to start using the application.

Using LDPlayer

  1. Download and install LDPlayer from https://www.ldplayer.net.
  2. Drag the APK/XAPK file directly into LDPlayer.

If you have any questions, please don't hesitate to contact us.

App Rating

3.9
Total 26 reviews

Reviews

1 ★, on 2019-02-09
Needs updating. Menu inaccessible -- icon does not show on my phone. No crosshairs to inspect dB levels on graph. No way to zoom graph. Cannot find the spectrum output file that was supposedly saved to my SD card. It's refund time...

3 ★, on 2020-08-16
I can't use for seeing time delay for my car audio. Thanks

5 ★, on 2017-03-10
Absolutely amazing app, can't believe that I can carry this around on my phone in my pocket. Very handy tool. Microphone calibration file upload would be great. The text on the graphs is tiny and almost impossible to to read. I revert to double stacking reading glasses or taking screen shots and zooming in.

5 ★, on 2017-02-10
Should look into doing Impulse Responses for rooms, having the app do the same processing but allowing for a longer decay tail to capture a room, with selectable decay time.

5 ★, on 2018-07-17
Was able to produce IR and use to simulate reverb via convolutions with another sample. Thank you. Could you describe what is the "step" plot and how does it differ from the IR plot? Also. Are there any menus to access options. In the app?

4 ★, on 2014-10-14
Can I use the saved files as a source for my IR reverb?

Previous Versions

Impulse Response 1.8
2020-08-01 / 115 KB / Android 2.3+

About this app

Turn your Android smartphone into a powerful tool for measuring the Impulse Response of audio systems.

This app will only be of interest to those who understand what an Impulse Response is!

The app generates an MLS signal from the speaker (or headset jack) and records it via the microphone, and then calculates the response of the system as a function of frequency and as a time series. The MLS signal is an alternative method to the usual sine wave sweeps, and in many ways superior.

The IR can be saved as a 44.1kHz 16bit Mono WAV file for use with third party tools such as Voxengo that use Impulse Response data.

The display shows the realtime spectral response together with the derived impulse signal as well as the step function. The spectrum can be shown in 1/1, 1/3 or 1/6 ISO octave bands, or in full pixel resolution. Another display shows the Phase of the impulse response as a function of frequency: the phase is unwrapped. The level (dB), frequency (HZ) can be adjusted via the Menu. An automatic time window feature homes in on the time region around the impulse - the duration of the window can be adjusted via the Menu.

The impulse and phase signal can be averaged, if desired. Spectrum response as well as the time series of the impulse response data can be saved in a file to the SD card for later retrieval, or offline processing (the files are simple text files easily imported into e.g. Excel), and shown alongside the realtime spectrum data.

To test the response of audio equipment, the MLS signal may be fed into its Line In input via a cable attached to the phone's headset jack. If a higher quality external microphone is to be used it can easily be attached using a Y breakout connector in the headset jack.

The MLS (Maximum Length Sequence) signal is much better than a simple pulse signal in that it has a greater power density and thus causes the equipment under test to operate in a more usual regime by exciting the whole frequency spectrum at once. This app uses a Fast Hadamard Transform to calculate the necessary convolution of the recorded signal with the MLS in order to extract the impulse response of the system.

Feedback and/or questions/problem reports are most welcome - please send email.

(If you require an Android-based SPL meter, Signal Generator, RT60 meter and Spectrum Analyser, please see our AudioTool app, also in Google Play.)

New features

v1.9 31Jul2020 Revised to include Menu button on screen. Now targets Android 28.