NOTE: This is a specialized app and not a generic audio player. It won't play regular stereo audio files nor MP3s. If you are not sure what ambisonic audio is, very likely this is not the right app to get (read below to learn more).
Video for version 2.0: http://youtu.be/gOsfo8or_0E
AmbiExplorer allows you to listen and explore ambisonic B-Format and UHJ audio files. It does it by decoding to stereo binaural or virtual microphones. You can decide were you want to be facing in the soundfield by moving a virtual 3D panner that lets you rotate and set the angles for either the virtual human head or the virtual microphones. The polar patterns for the microphones can be set ranging from omni-directional to bi-directional.
The positioning sensors in a phone or a Bluetooth tracking device can also be used for head-tracking. This can give you the option of attaching the sensing device to the top of your head or headphones and get a more realistic immersive 3D sound experience.
For any questions, suggestions or issues please email me (use the Developer's Send Email link below)
Important Compatibility Notes:
* This app currently requires Android version 4..0 or above and works better on recent devices with a powerful CPU.
* For the positioning feature using sensors, a device with accelerometer, gyroscope and magnetometer (compass) is required. If your device doesn't have these sensors this feature will be disabled.
* This app has been tested on recent high-end devices. It will very likely work on many more devices but please try to check as soon as you install so you can request a refund if necessary (Google gives a 15 minute time window only). Before requesting a refund try contacting the developer.
- First order B-Format and UHJ playback (future updates will support higher orders)
- Optimized CIPIC HRTFs from the Ambisonic Toolkit www.ambisonictoolkit.net and LISTEN
- Library management with export and import locally and online via .ambxp files (csv format)
- Geotagging, map and location aware playback
- Handles one 4 channel or split two stereo B-Format files and UHJ stereo files (wav, aiff, amb or ogg)
- Outputs to binaural, stereo virtual microphones or stereo UHJ
- Soundfield rotation and virtual mic positioning using a multitouch interface
- Use the device's orientation sensors or external Bluetooth devices for head-tracking (based on: https://github.com/ptrbrtz/razor-9dof-ahrs/wiki/Tutorial )
- Offline export to wav or ogg files
- Audio file sharing (DropBox, SoundCloud, Google Drive, etc.)
- 5 band equalizer
If you are new to ambisonics:
Ambisonics is a recording and reproduction system that was invented by Michael Gerzon of the Mathematical Institute in Oxford. This system allows to record the full 360 degrees of sound and later reproduce it through any number of speakers or headphones. These recordings can be processed to get audio signals that are equivalent to having placed a specific type of microphone pointing in a specific direction. This means it is possible to record and later decide where to place the microphones.
Ambisonic recordings can be made using a commercially available Tetrahedral microphone. The B-format files obtained from these recordings are the ones this app can play.
Instead of recording, you can also create surround mixes using already available ambisonic plugins that can be used in your multitrack audio editor. These mixes can be exported as B-Format and played with this app giving them the possibility of interactive, realistic listening.
Ambisonic recording used in the video by John Leonard and the Orfeo Trio
Some external web resources:
What is ambisonics?
What is UHJ?
Download and share B-Format recordings: